Quantum valence criticality in a correlated metal

Kentaro Kuga, Yosuke Matsumoto, Mario Okawa, Shintaro Suzuki, Takahiro Tomita, Keita Sone, Yasuyuki Shimura, Toshiro Sakakibara, Daisuke Nishio-Hamane, Yoshitomo Karaki, Yasutaka Takata, Masaharu Matsunami, Ritsuko Eguchi, Munetaka Taguchi, Ashish Chainani, Shik Shin, Kenji Tamasaku, Yoshinori Nishino, Makina Yabashi, Tetsuya Ishikawa, Satoru Nakatsuji

Science Advances   4 ( 2 )   eaao3547 - 6   2018.2

Strange metal without magnetic criticality

Takahiro Tomita, Kentaro Kuga, Yoshiya Uwatoko, Piers Coleman, Satoru Nakatsuji

Science   349 ( 6247 )   506 - 509   2015.7

Magnetic order induced by Fe substitution of Al site in the heavy-fermion systems α-YbAlB<inf>4</inf> and β-YbAlB<inf>4</inf>

Kentaro Kuga, Gregory Morrison, Larico Treadwell, Julia Y. Chan, Satoru Nakatsuji

Physical Review B - Condensed Matter and Materials Physics   86 ( 22 )   224413-1 - 6   2012.12

Spin-orbital short-range order on a honeycomb-based lattice

S. Nakatsuji, K. Kuga, K. Kimura, R. Satake, N. Katayama, E. Nishibori, H. Sawa, R. Ishii, M. Hagiwara, F. Bridges, T. U. Ito, W. Higemoto, Y. Karaki, M. Halim, A. A. Nugroho, J. A. Rodriguez-Rivera, M. A. Green, C. Broholm

Science   336 ( 6081 )   559 - 563   2012.5

Quantum criticality without tuning in the mixed valence compound β-YbAlB<inf>4</inf>

Yosuke Matsumoto, Satoru Nakatsuji, Kentaro Kuga, Yoshitomo Karaki, Naoki Horie, Yasuyuki Shimura, Toshiro Sakakibara, Andriy H. Nevidomskyy, Piers Coleman

Science   331 ( 6015 )   316 - 319   2011.1

Superconducting properties of the non-fermi-liquid system β-YbAlB4

K. Kuga, Y. Karaki, Y. Matsumoto, Y. Machida, S. Nakatsuji

Physical Review Letters   101 ( 13 )   137004-1 - 4   2008.9

Superconductivity and quantum criticality in the heavy-fermion system β-YbAlB4

S. Nakatsuji, K. Kuga, Y. Machida, T. Tayama, T. Sakakibara, Y. Karaki, H. Ishimoto, S. Yonezawa, Y. Maeno, E. Pearson, G. G. Lonzarich, L. Balicas, H. Lee, Z. Fisk

Nature Physics   4 ( 8 )   603 - 607   2008.8

Evidence for energy-dependent scattering dominating thermoelectricity in heavy fermion systems

Daiki Goto, Kentaro Kuga, Kiyohisa Tanaka, Tsunehiro Takeuchi, Masaharu Matsunami

Applied Physics Letters   127 ( 16 )   161903 - 161903   2025.10

Coupling of magnetism and transport properties to the lattice degrees of freedom in NdBaCo₂O_5+δ (δ ~ 0.65)

Himanshu Pant, Saurabh Singh, Jaskirat Brar, Priyamedha Sharma, M Bharath, Kentaro Kuga, Tsunehiro Takeuchi, R Bindu

Journal of Physics: Condensed Matter   37 ( 13 )   135603 - 135603   2025.2

Orbital hybridisation effects in B2 phase Cr doped Co2MnAl.

Swati Pathak, Saurabh Singh, S Khalid, Kentaro Kuga, Tsunehiro Takeuchi, R Bindu

Journal of Physics: Condensed Matter   35 ( 39 )   2023.10

Lattice effects on the physical properties of half-doped perovskite ruthenates

Jaskirat Brar, Saurabh Singh, Kentaro Kuga, Priyamedha Sharma, M. Bharath, Tsunehiro Takeuchi, R. Bindu

Journal of Physics: Condensed Matter   35 ( 19 )   2023.5

Valence fluctuation in Yb₃Si₅ probed by synchrotron X-ray photoemission spectroscopy

Kentaro Kuga, Masaharu Matsunami, Hidenori Fujiwara, Goro Nozue, Akane Ose, Akira Sekiyama, Akira Yasui, Satoru Hamamoto, Masaki Oura, Tsunehiro Takeuchi

Japanese Journal of Applied Physics   62 ( SD )   SD1014 - SD1014   2023.5

Thermoelectric performance of Fe₂V_0.9W_0.1Al thin films deposited on n-type Si substrates

Machda, F., Singh, S., Kuga, K., Ang, A.K.R., Matsunami, M., Takeuchi, T.

Japanese Journal of Applied Physics   62 ( 5 )   2023.5

Magneto-thermal conductivity effect and enhanced thermoelectric figure of merit in Ag₂Te

Keisuke Hirata, Kentaro Kuga, Masaharu Matsunami, Minyue Zhu, Joseph P. Heremans, Tsunehiro Takeuchi

AIP Advances   13 ( 1 )   2023.1

Multicritical phase diagram of PrMn_1-xSb₂ with two interacting magnetic elements

Takahiro Urata, Yusuke Takahashi, Kentaro Kuga, Tsunehiro Takeuchi, Hiroshi Ikuta

Physical Review B   106 ( 18 )   2022.11

Synthesis and structural link to the electronic and magneto-transport properties of spin-orbit Mott insulator Sr2IrO4.

Priyamedha Sharma, Saurabh Singh, Kentaro Kuga, Tsunehiro Takeuchi, R Bindu

Journal of Physics: Condensed Matter   34 ( 43 )   2022.10

Electronic structure of silver chalcogenides investigated by hard x-ray photoemission spectroscopy and density functional theory calculations

K. Sato, K. Hirata, S. Singh, K. Kuga, F. Ogawa, M. Matsunami, T. Takeuchi

Journal of Applied Physics   132 ( 4 )   2022.7

Pressure-induced changes of valence fluctuation in beta-YbAlB4 probed by x-ray

Yui Sakaguchi, Shugo Ikeda, Naomi Kawamura, Masaichiro Mizumaki, Kentaro Kuga, Shintaro Suzuki, Keita Sone, Satoru Nakatsuji, Hisao Kobayashi

PHYSICAL REVIEW B   105 ( 15 )   2022.4

Synergetic Enhancement of the Power Factor and Suppression of Lattice Thermal Conductivity via Electronic Structure Modification and Nanostructuring on a Ni- And B-Codoped p-Type Si-Ge Alloy for Thermoelectric Application

Omprakash Muthusamy, Saurabh Singh, Keisuke Hirata, Kentaro Kuga, Santhana Krishnan Harish, Masaru Shimomura, Masahiro Adachi, Yoshiyuki Yamamoto, Masaharu Matsunami, Tsunehiro Takeuchi

ACS Applied Electronic Materials   3 ( 12 )   5621 - 5631   2021.12

High-temperature antiferromagnetism in Yb based heavy fermion systems proximate to a Kondo insulator

Shintaro Suzuki, Kou Takubo, Kentaro Kuga, Wataru Higemoto, Takashi U. Ito, Takahiro Tomita, Yasuyuki Shimura, Yosuke Matsumoto, Cédric Bareille, Hiroki Wadati, Shik Shin, Satoru Nakatsuji

Physical Review Research   3 ( 2 )   2021.5

Strong in-plane anisotropy in the electronic structure of fixed-valence β- LuAlB4

Pascal Reiss, Jordan Baglo, Hong'En Tan, Xiaoye Chen, Sven Friedemann, Kentaro Kuga, F. Malte Grosche, Satoru Nakatsuji, Michael Sutherland

Physical Review B   102 ( 8 )   2020.8

Ground State Local 4f Symmetry of CeAgSb2 Probed by Linearly Polarized Hard X-ray Photoemission

H. Fujiwara, Y. Kondo, S. Hamamoto, Y. Kanai-Nakata, K. Kuga, A. Yamasaki, A. Higashiya, T. Kadono, S. Imada, T. Kiss, A. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, T. Ebihara, A. Sekiyama

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)   2020.3

Observation of Electronic Structures in Sr-Based Iridates by Bulk-Sensitive Photoemission Spectroscopy

Koya Nakagawa, Hidenori Fujiwara, Satoru Hamamoto, Sho Miyazaki, Yasuhiro Nakatani, Kentaro Kuga, Atsushi Higashiya, Toshiharu Kadono, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Takayuki Muro, Shin Imada, Akira Sekiyama, Kouichi Takase, Hiromi Kobori, Atsushi Yamasaki

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)   30   011146-1 - 6   2020.3

Local 4f Electronic Structure in PrAg2In Studied by Polarized X-Ray Absorption and Photoemission Spectroscopy

Satoru Hamamoto, Shuhei Fujioka, Yuina Kanai-Nakata, Kohei Yamagami, Kentaro Kuga, Hidenori Fujiwara, Takayuki Kiss, Hiroyuki S. Suzuki, Atsushi Higashiya, Atsushi Yamasaki, Shin Imada, Arata Tanaka, Yukiharu Takeda, Yuji Saitoh, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Akira Sekiyama

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)   30   011113-1 - 5   2020.3

Linearly Polarized Hard X-Ray Photoemission Spectroscopy of PrBe13

Satoru Hamamoto, Yuina Kanai-Nakata, Hidenori Fujiwara, Kentaro Kuga, Takayuki Kiss, Atsushi Higashiya, Atsushi Yamasaki, Shin Imada, Arata Tanaka, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka, Akira Sekiyama

Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena   29   012010-1 - 6   2020.2

Linear polarization-dependent core-level photoemission spectroscopy in Yb-based valence fluctuating system

Kentaro Kuga, Yuina Kanai, Hidenori Fujiwara, Kohei Yamagami, Satoru Hamamoto, Yuichi Aoyama, Akira Sekiyama, Atsushi Higashiya, Toshiharu Kadono, Shin Imada, Atsushi Yamasaki, Kenji Tamasaku, Makina Yabashi, Tetsuya Ishikawa, Satoru Nakatsuji, Takayuki Kiss

Journal of Electron Spectroscopy and Related Phenomena   238   146889-1 - 4   2020.1

Observation of the 4f ground-state symmetry in strongly correlated cubic Pr compounds probed by linearly polarized 3d core-level photoemission spectroscopy

S. Hamamoto, Y. Kanai, S. Fujioka, Y. Nakatani, H. Fujiwara, K. Kuga, T. Kiss, A. Higashiya, A. Yamasaki, S. Imada, A. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, H. Hidaka, T. Yanagisawa, H. Amitsuka, K. T. Matsumoto, T. Onimaru, T. Takabatake, A. Sekiyama

Journal of Electron Spectroscopy and Related Phenomena   238   146885-1 - 4   2020.1

Thermoelectric properties and electronic structure for CePd₃ and related materials

Ogawa F., Kuga K., Hirata K., Matsunami M., Takeuchi T.

Meeting Abstracts of the Physical Society of Japan   75.1 ( 0 )   1904 - 1904   2020

Revising the 4f symmetry in CeCu2Ge2: Soft x-ray absorption and hard x-ray photoemission spectroscopy

H. Aratani, Y. Nakatani, H. Fujiwara, M. Kawada, Y. Kanai, K. Yamagami, S. Fujioka, S. Hamamoto, K. Kuga, T. Kiss, A. Yamasaki, A. Higashiya, T. Kadono, S. Imada, A. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, A. Yasui, Y. Saitoh, Y. Narumi, K. Kindo, T. Ebihara, A. Sekiyama

Physical Review B   98 ( 12 )   121113\_1 - 121113\_6   2018.9

Valence fluctuating compound α-YbAlB<inf>4</inf> studied by ¹⁷⁴Yb Mössbauer spectroscopy and X-ray diffraction using synchrotron radiation

Momoko Oura, Shugo Ikeda, Ryo Masuda, Yasuhiro Kobayashi, Makoto Seto, Yoshitaka Yoda, Naohisa Hirao, Saori I. Kawaguchi, Yasuo Ohishi, Shintaro Suzuki, Kentaro Kuga, Satoru Nakatsuji, Hisao Kobayashi

Physica B: Condensed Matter   536 ( 1 )   162 - 164   2018.5

Hole doping effect on the electronic structure of layered oxypnictide LaOMnAs

A. Higashiya, K. Nakagawa, A. Yamasaki, K. Nagai, S. Fujioka, Y. Kanai, K. Yamagami, H. Fujiwara, A. Sekiyama, Amina Abozeed, T. Kadono, S. Imada, K. Kuga, M. Yabashi, K. Tamasaku, T. Ishikawa, S. Toyama, K. Takase

Journal of Electron Spectroscopy and Related Phenomena   220   58 - 60   2017.10

Frustrated magnetism in the Heisenberg pyrochlore antiferromagnets AYb2X4 (A=Cd, Mg; X= S, Se)

Tomoya Higo, Kensuke Iritani, Mario Halim, Wataru Higemoto, Takashi U. Ito, Kentaro Kuga, Kenta Kimura, Satoru Nakatsuji

Physical Review B   95 ( 17 )   174443-1 - 7   2017.5

Anisotropic Thermal Expansion of α-YbAlB<inf>4</inf>

Yosuke Matsumoto, K. Kuga, T. Tomita, R. Küchler, S. Nakatsuji

Journal of Physics: Conference Series   807 ( 2 )   2017.4

Lifetime-broadening-suppressed X-ray absorption spectrum of β-YbAlB4 deduced from Yb 3d → 2p resonant X-ray emission spectroscopy

Naomi Kawamura, Noriko Kanai, Hisashi Hayashi, Yasuhiro H. Matsuda, Masaichiro Mizumaki, Kentaro Kuga, Satoru Nakatsuji, Shinji Watanabe

Journal of the Physical Society of Japan   86 ( 1 )   014711-1 - 7   2017.1

Pressure-induced magnetic transition exceeding 30 K in the Yb-based heavy-fermion β-YbAlB4

Takahiro Tomita, Kentaro Kuga, Yoshiya Uwatoko, Satoru Nakatsuji

Physical Review B   94 ( 24 )   245130-1 - 6   2016.12

Quantum criticality and inhomogeneous magnetic order in Fe-doped α-YbAlB4

D. E. MacLaughlin, K. Kuga, Lei Shu, O. O. Bernal, P. C. Ho, S. Nakatsuji, K. Huang, Z. F. Ding, C. Tan, Jian Zhang

Physical Review B   93 ( 21 )   214421-1 - 8   2016.6

Pressure-induced local structural changes in heavy fermion β-YbAlB<inf>4</inf>

Yui Sakaguchi, Shugo Ikeda, Kentaro Kuga, Shintaro Suzuki, Satoru Nakatsuji, Naohisa Hirao, Yasuo Ohishi, Hisao Kobayashi

Journal of the Physical Society of Japan   85 ( 2 )   023602-1 - 4   2016.3

High Magnetic Transition Temperature and Semiconductor like Transport Properties of Mn-doped α-YbAlB<inf>4</inf>

S. Suzuki, T. Tomita, Y. Shimura, K. Kuga, Y. Matsumoto, S. Nakatsuji

Journal of Physics: Conference Series   683 ( 1 )   2016.2

Site-selective ¹¹B NMR studies on YbAlB<inf>4</inf>

S. Takano, M. S. Grbic, K. Kimura, M. Yoshida, M. Takigawa, E. C.T.O. Farrell, K. Kuga, S. Nakatsuji, H. Harima

Journal of Physics: Conference Series   683 ( 1 )   2016.2

Quantum Criticality Beneath the Superconducting Dome in β-YbAlB<inf>4</inf>

T. Tomita, K. Kuga, Y. Uwatoko, S. Nakatsuji

Journal of Physics: Conference Series   683 ( 1 )   2016.2

X-ray Absorption Spectroscopy in the Heavy Fermion Compound α-YbAlB4 at High Magnetic Fields

Taku T. Terashima, Yasuhiro H. Matsuda, Kentaro Kuga, Shintaro Suzuki, Yosuke Matsumoto, Satoru Nakatsuji, Akihiro Kondo, Koichi Kindo, Naomi Kawamura, Masaichiro Mizumaki, Toshiya Inami

Journal of the Physical Society of Japan   84 ( 11 )   114715-1 - 4   2015.11

Magnetic order in the frustrated ising quasi-one dimensional compound NaCo(acac)<inf>3</inf>·benzene

Yoshitomo Karaki, Kentaro Kuga, Kenta Kimura, Satoru Nakatsuji, Kazuyuki Matsubayashi, Yoshiya Uwatoko

Journal of the Physical Society of Japan   84 ( 8 )   084708-1 - 5   2015.8

Intact quasiparticles at an unconventional quantum critical point

M. L. Sutherland, E. C.T. O'Farrell, W. H. Toews, J. Dunn, K. Kuga, S. Nakatsuji, Y. Machida, K. Izawa, R. W. Hill

Physical Review B - Condensed Matter and Materials Physics   92 ( 4 )   2015.7

Conduction electron spin resonance in the α-Yb<inf>1-x</inf>xFe<inf>x</inf>AlB<inf>4</inf> (0≤x ≤0.50) and α-LuAlB<inf>4</inf>compounds

L. M. Holanda, G. G. Lesseux, E. T. Magnavita, R. A. Ribeiro, S. Nakatsuji, K. Kuga, Z. Fisk, S. B. Oseroff, R. R. Urbano, C. Rettori, P. G. Pagliuso

Journal of Physics Condensed Matter   27 ( 25 )   2015.7

Field evolution of quantum critical and heavy fermi-liquid components in the magnetization of the mixed valence compound &amp;β;-YbAlB4

Yosuke Matsumoto, Kentaro Kuga, Yoshitomo Karaki, Yasuyuki Shimura, Toshiro Sakakibara, Masashi Tokunaga, Koichi Kindo, Satoru Nakatsuji

Journal of the Physical Society of Japan   84 ( 2 )   024710-1 - 7   2015.2

Unconventional Quantum Criticality in β-YbAlB<inf>4</inf> Detached from Its Magnetically Ordered Phase

Takahiro Tomita, Kentaro Kuga, Yoshiya Uwatoko, Piers Coleman, Satoru Nakatsuji

Physics Procedia   75   482 - 487   2015

Magnetization of Yb-Based Mixed-Valent Compounds at Megagauss Fields

T. Terashima, Y. H. Matsuda, K. Kuga, Y. Matsumoto, S. Nakatsuji, K. Yoshimura, T. Nakahigashi

JPS Conference Proceedings   3   011027-1 - 5   2014.6

Two Magnetic Phases in alpha-YbAl1−xFexB4

Kentaro Kuga, Shintaro Suzuki, Satoru Nakatsuji

JPS Conference Proceedings   3   012013-1 - 4   2014.6

Suppression of the Heavy Fermion State in Magnetic Fields in the Mixed Valent alpha-YbAIB4

Yosuke Matsumoto, Kuga Kentaro, Satoru Nakatsuji

JPS Conference Proceedings   3   011076-1 - 5   2014.6

Superconducting Properties of the Ferroquadrupolar Cubic Gamma3 Compound PrTi2Al20

Akito Sakai, Kentaro Kuga, Satoru Nakatsuji

JPS Conference Proceedings   3   011066-1 - 6   2014.6

Structural and Magnetic Properties of alpha-Yb(Al1−xFex)B4 under Hydrostatic Pressure

Yui Sakaguchi, Shugo Ikeda, Kentaro Kuga, Satoru Nakatsuji, Naohisa Hirao, Yasuo Ohishi, Hisao Kobayashi

JPS Conference Proceedings   3   011059-1 - 6   2014.6

Anisotropic transverse magnetoresistivity in α-YbAlB<inf>4</inf>

Yosuke Matsumoto, Jinpyo Hong, Kentaro Kuga, Satoru Nakatsuji

Journal of Physics: Conference Series   592 ( 1 )   012086-1 - 6   2014

Synchrotron X-ray spectroscopy study on the valence state and magnetization in α-YbAl<inf>1-x</inf>Fe<inf>x</inf>B<inf>4</inf> (x =0.115) at low temperatures and high magnetic fields

T. Terashima, Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A. Kondo, K. Kindo, N. Kawamura, M. Mizumaki, T. Inami

Journal of Physics: Conference Series   592 ( 1 )   012020-1 - 6   2014

High pressure measurements of the resistivity of β-YbAlB<inf>4</inf>

T. Tomita, K. Kuga, Y. Uwatoko, S. Nakatsuji

Journal of Physics: Conference Series   592 ( 1 )   012019-1 - 5   2014

Chemical effects of high-resolution yblγ<inf>4</inf> emission spectra: A possible probe for chemical analysis

Hisashi Hayashi, Noriko Kanai, Naomi Kawamura, Yasuhiro H. Matsuda, Kentaro Kuga, Satoru Nakatsuji, Tetsuro Yamashita, Shigeo Ohara

X-Ray Spectrometry   42 ( 6 )   450 - 455   2013.11

Magnetic order induced by Fe doping in the intermediate valence system β-YbAlB<inf>4</inf>

K. Kuga, S. Nakatsuji

Journal of the Korean Physical Society   63 ( 3 )   549 - 550   2013.8

Mössbauer spectroscopy of Fe-doped valence-fluctuating α-YbAlB<inf>4</inf>

Yui Sakaguchi, Shugo Ikeda, Hisao Kobayashi, Kentaro Kuga, Keita Sone, Satoru Nakatsuji

Journal of the Korean Physical Society   62 ( 12 )   2146 - 2149   2013.7

Synchrotron X-ray spectroscopy study on the valence state in α- and β-YbAlB<inf>4</inf> at low temperatures and high magnetic fields

Y. H. Matsuda, T. Nakamura, K. Kuga, S. Nakatsuji, S. Michimura, T. Inami, N. Kawamura, M. Mizumaki

Journal of the Korean Physical Society   62 ( 12 )   1778 - 1781   2013.7

Conduction electron spin resonance in AlB₂

L M Holanda, L Mendonça-Ferreira, R A Ribeiro, J M Osorio-Guillén, G M Dalpian, K Kuga, S Nakatsuji, Z Fisk, R R Urbano, P G Pagliuso, C Rettori

Journal of Physics: Condensed Matter   25 ( 21 )   216001 - 216001   2013.5

Magnetic order induced by Fe substitution of Al site in the heavy-fermion systems α-YbAlB₄ and β-YbAlB₄

Kuga, K; Morrison, G; Treadwell, L; Chan, JY; Nakatsuji, S

PHYSICAL REVIEW B   86 ( 22 )   2012.12

Thermoelectric response near a quantum critical point of β-YbAlB <inf>4</inf> and YbRh <inf>2</inf>Si <inf>2</inf>: A comparative study

Y. MacHida, K. Tomokuni, C. Ogura, K. Izawa, K. Kuga, S. Nakatsuji, G. Lapertot, G. Knebel, J. P. Brison, J. Flouquet

Physical Review Letters   109 ( 15 )   156405-1 - 5   2012.10

Superconductivity in the ferroquadrupolar state in the quadrupolar kondo lattice PrTi <inf>2</inf>Al <inf>20</inf>

Akito Sakai, Kentaro Kuga, Satoru Nakatsuji

Journal of the Physical Society of Japan   81 ( 8 )   083702-1 - 4   2012.8

T/B scaling of magnetization in the mixed valent compound β-YbAlB <inf>4</inf>

Yosuke Matsumoto, S. Nakatsuji, K. Kuga, Y. Karaki, Y. Shimura, T. Sakakibara, A. H. Nevidomskyy, P. Coleman

Journal of Physics: Conference Series   391 ( 1 )   012041-1 - 4   2012

Anisotropic heavy-Fermi-liquid formation in valence-fluctuating α-YbAlB<inf>4</inf>

Yosuke Matsumoto, Kentaro Kuga, Takahiro Tomita, Yoshitomo Karaki, Satoru Nakatsuji

Physical Review B - Condensed Matter and Materials Physics   84 ( 12 )   125126-1 - 7   2011.9

Quantum critical kondo quasiparticles probed by ESR in β-YbAlB <inf>4</inf>

L. M. Holanda, J. M. Vargas, W. Iwamoto, C. Rettori, S. Nakatsuji, K. Kuga, Z. Fisk, S. B. Oseroff, P. G. Pagliuso

Physical Review Letters   107 ( 2 )   026402-1 - 4   2011.7

Anisotropic electrical transport in the heavy fermion compound α-YbAlB<inf>4</inf>

Kentaro Kuga, Yosuke Matsumoto, Naoki Horie, Satoru Nakatsuji

Journal of the Physical Society of Japan   80 ( SUPPL. A )   SA089-1 - 2   2011.7

Thermoelectric coefficients of the quantum critical β-YbAlB <inf>4</inf>

Y. Machida, C. Ogura, K. Izawa, K. Kuga, S. Nakatsuji

Journal of the Physical Society of Japan   80 ( SUPPL. A )   SA088-1 - 3   2011.7

NMR/NQR and Specific Heat Studies of Iron Pnictide Superconductor KFe₂As₂

H. Fukazawa, T. Saito, Y. Yamada, K. Kondo, M. Hirano, Y. Kohori, K. Kuga, A. Sakai, Y. Matsumoto, S. Nakatsuji, K. Kihou, A. Iyo, C. H. Lee, H. Eisaki

Journal of the Physical Society of Japan   80 ( Suppl.A )   SA118 - SA118   2011.7

Low temperature magnetic properties of Pr(Cu,Ga)<inf>13</inf> with orbitally degenerate ground state

Yasuyuki Shimura, Toshiro Sakakibara, Kentaro Kuga, Jung Young Cho, Julia Y. Chan

Journal of the Physical Society of Japan   80 ( SUPPL. A )   SA072-1 - 3   2011.7

Kondo lattice behavior in the valence fluctuating systems α- and β-YbAlB<inf>4</inf>

Yosuke Matsumoto, Kentaro Kuga, Naoki Horie, Satoru Nakatsuji

Journal of the Physical Society of Japan   80 ( SUPPL. A )   SA090-1 - 3   2011.7

Local moment behaviors of the valence fluctuating systems β-YbAlB <inf>4</inf> and α-YbAlB<inf>4</inf>

Y. Matsumoto, K. Kuga, N. Horie, S. Nakatsuji

Journal of Physics: Conference Series   273 ( 1 )   012006-1 - 4   2011

Low-temperature magnetic properties of Pr(Cu,Ga)<inf>12.85</inf>

Y. Shimura, T. Sakakibara, K. Kuga, J. Y. Cho, J. Y. Chan

Journal of Physics: Conference Series   273 ( 1 )   012054-1 - 4   2011

Strong valence fluctuation in the quantum critical heavy fermion superconductor β-YbAlB4: A hard x-ray photoemission study

M. Okawa, M. Matsunami, K. Ishizaka, R. Eguchi, M. Taguchi, A. Chainani, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, K. Kuga, N. Horie, S. Nakatsuji, S. Shin

Physical Review Letters   104 ( 24 )   247201-1 - 4   2010.6

Low-temperature magnetization of the quantum critical heavy fermion superconductor β-YbAlB<inf>4</inf>

Yosuke Matsumoto, Kentaro Kuga, Yoshitomo Karaki, Takahiro Tomita, Satoru Nakatsuji

Physica Status Solidi (B) Basic Research   247 ( 3 )   720 - 722   2010.3

Pronounced non-fermi-liquid behavior of the quantum critical heavy fermion superconductor β-YbAlB<inf>4</inf>

Satoru Nakatsuji, Kentaro Kuga, Takahiro Tomita, Yosuke Matsumoto

Physica Status Solidi (B) Basic Research   247 ( 3 )   485 - 489   2010.3

Crystal growth, structure, and physical properties of Ln(Cu,Al)<inf>12</inf>(Ln = y , Ce, Pr, Sm, and Yb) and Ln(Cu,Ga)<inf>12</inf> (Ln = Y, Gd-Er, and Yb)

Brenton L. Drake, C. Capan, Jung Young Cho, Y. Nambu, K. Kuga, Y. M. Xiong, A. B. Karki, S. Nakatsuji, P. W. Adams, D. P. Young, Julia Y. Chan

Journal of Physics Condensed Matter   22 ( 6 )   2010.2

Possible multiple gap superconductivity with line nodes in heavily hole-doped superconductor KFe <inf>2</inf>As <inf>2</inf> studied by <inf>75</inf>As nuclear quadrupole resonance and specific heat

Hideto Fukazawa, Yuji Yamada, Kenji Kondo, Taku Saito, Yoh Kohori, Kentarou Kuga, Yosuke Matsumoto, Satoru Nakatsuji, Hijiri Kito, Parasharam M. Shirage, Kunihiro Kihou, Nao Takeshita, Chul Ho Lee, Akira Iyo, Hiroshi Eisaki

Journal of the Physical Society of Japan   78 ( 8 )   083712-1 - 4   2009.8

Crystal growth, structure, and physical properties of Ln(Cu,Ga) <inf>3-x</inf>(Ln=La-Nd, Eu; x≈0.2)

Jung Young Cho, Evan L. Thomas, Yusuke Nambu, Cigdem Capan, Amar B. Karki, David P. Young, Kentarou Kuga, Satoru Nakatsuji, Julia Y. Chan

Chemistry of Materials   21 ( 14 )   3072 - 3078   2009.7

Role of f electrons in the fermi surface of the heavy fermion superconductor β-YbAlB4

E. C.T. O'Farrell, D. A. Tompsett, S. E. Sebastian, N. Harrison, C. Capan, L. Balicas, K. Kuga, A. Matsuo, K. Kindo, M. Tokunaga, S. Nakatsuji, G. Csányi, Z. Fisk, M. L. Sutherland

Physical Review Letters   102 ( 21 )   216402-1 - 4   2009.5

Crystal growth, transport, and magnetic properties of YbCoGa <inf>5</inf>

Edem K. Okudzeto, Kentarou Kuga, Satoru Nakatsuji, Julia Y. Chan

Crystal Growth and Design   9 ( 4 )   1956 - 1959   2009.4

Crystal structure and physical properties of polymorphs of LnAlB <inf>4</inf> (Ln = Yb, Lu)

Robin T. Macaluso, Satoru Nakatsuji, Kentaro Kuga, Evan Lyle Thomas, Yo Machida, Yoshiteru Maeno, Zachary Fisk, Julia Y. Chan

Chemistry of Materials   19 ( 8 )   1918 - 1922   2007.4