46. Multiple-site Ag doping in Bi2Se3: Compositional crossover from substitution to intercalation as revealed by photoelectron diffraction and X-ray fluorescence holography
F. Matsui, H. Ota, R. Eguchi, H. Goto, Kaya Kobayashi, J. Akimitsu, H. Ozaki, T. Nishioka, K. Kimura, K. Hayashi, T. Shimano, N. Happo, Y. Kubozono,
Journal of Electron Spectroscopy and Related Phenomena, 264, 147295 (2023).
45. Chiral phonons: circularly polarized Raman spectroscopy and ab initio calculations in a chiral crystal tellurium
K. Ishito, H. Mao, Kaya Kobayashi, Y. Kousaka, Y. Togawa, H. Kusunose, J.-I. Kishine, T. Satoh
Chirality 35(6), 338-345 (2023).
44. Semiconductor-metal transition in Bi2Se3 caused by impurity doping
T. Uchiyama, H. Goto, E. Uesugi, A. Takai, L. Zhi, A. Miura, S. Hamao, R. Eguchi, H. Ota, K. Sugimoto, A. Fujiwara, F. Matsui, K. Kimura, K. Hayashi, T. Ueno, Kaya Kobayashi, J. Akimitsu, and Y. Kubozono
Scientific Reports 13, 537 (2023).
43. Full superconducting gap in the candidate topological superconductor In1-xPbxTe for x = 0.2
M. P. Smylie,Kaya Kobayashi, J. Z. Dans, H. Hebbeker, R. Chapai, W.-K. Kwok, and U. Welp
Phys. Rev. B 106, 054503 (2022).
42. Hole doping and chemical pressure effects on the strong coupling superconductor PdTe
Li Chen, Ando Ide, Harald O. Jeschke, Kaya Kobayashi
Phys. Chem. Chem. Phys., 23, 13331-13337 (2022).
41. Current-Induced Magnetization Caused by Crystal Chirality in Nonmagnetic Elemental Tellurium
Tetsuya Furukawa, Yuta Watanabe, Naoki Ogasawara, Kaya Kobayashi, and Tetsuaki Itou,
Phys. Rev. Res. 3, 023111 (2021).
40. Time-reversal invariant and fully gapped unconventional superconducting state in the bulk of the topological compound Nb0.25Bi2Se3
Debarchan Das, Kaya Kobayashi, M. P. Smylie, C. Mielke III, T. Takahashi, K. Willa, J.-X. Yin, U. Welp, M. Z. Hasan, A. Amato, H. Luetkens, and Z. Guguchia,
Phys. Rev. B 102, 134514 (2020).
39. Superconductivity in Bi2-xSbxTe3-ySey (x = 1.0 and y = 2.0) under pressure
Tong He, Xiaofan Yang, Tomoya Taguchi, Lei Zhi, Takafumi Miyazaki, Kaya Kobayashi, Jun Akimitsu, Hirofumi Ishii, Yen-Fa Liao, Hidenori Goto, Ritsuko Eguchi and Yoshihiro Kubozono,
J. Phys.: Condens. Matter 32, 465702 (2020).
38. Magnetotransport properties of tellurium under extreme conditions
Kazuto Akiba, Kaya Kobayashi, Tatsuo C. Kobayashi, Ryo Koezuka, Atsushi Miyake, Jun Gouchi, Yoshiya Uwatoko, and Masashi Tokunaga,
Phys. Rev. B 101, 245111, (2020).
37. Optical signatures of phase transitions and structural modulation in elemental tellurium under pressure
Diego Rodriguez, Alexander A. Tsirlin, Tobias Biesner, Teppei Ueno, Takeshi Takahashi, Kaya Kobayashi, Martin Dressel, and Ece Uykur,
Phys. Rev. B, 101, 174104 (2020).
36. Superconducting Properties of AgSnSe2 Studied by 77Se-NMR and 119Sn-NMR
K. Watanabe, Y. Naijo, K. Hada, T. Furukawa, T. Itou, T. Ueno, Kaya Kobayashi, and J. Akimitsu,
JPS Conf. Proc. 30, 011057 (2020).
35. muSR Study of the Magnetic State in Hole and Electron Doped Sr2IrO4
S. Tsunoda, K. Horigane, H. Okabe, K. Machida, M. Akimitsu, K. Kawashima, R. Horie, Kaya Kobayashi, A. Koda, R. Kadono, and J. Akimitsu,
JPS Conf. Proc. 30, 011145 (2020) .
34. Two linear regimes in optical conductivity of a Type-I Weyl semimetal: The case of elemental tellurium
Diego Rodriguez, Alexander A. Tsirlin, Tobias Biesner, Teppei Ueno, Takeshi Takahashi, Kaya Kobayashi, Martin Dressel, and Ece Uykur,
Phys. Rev. Lett. 124, 136402 (2020).
33. Nodeless superconducting gap in the candidate topological superconductor Sn1-xInxTe for x=0.7
M. P. Smylie, Kaya Kobayashi, T. Takahashi, C. Chaparro, A. Snezhko, W.-K. Kwok, and U. Welp,
Phys. Rev. B 101, 094513 (2020).
32. Unusual electronic state of Sn in AgSnSe2
Y. Naijo, K. Hada, T. Furukawa, T. Itou, T. Ueno, Kaya Kobayashi, I. I. Mazin, H. O. Jeschke, and J. Akimitsu,
Phys. Rev. B 101, 075134 (2020).
31. Superconducting 3R-Ta1+xSe2 with Giant In-Plane Upper Critical Fields
Yuki Tanaka, Hideki Matsuoka, Masaki Nakano, Yue Wang, Sana Sasakura, Kaya Kobayashi, and Yoshihiro Iwasa,
Nano Letters, 20 (3) 1725-1730 (2020).
30. Superconductivity in 5d transition metal Laves phase SrIr2
R. Horie, K. Horigane, S. Nishiyama, M. Akimitsu, Kaya Kobayashi, S. Onari, T. Kambe, Y. Kubozono and J. Akimitsu,
Journal of Physics: Condensed Matter, 32, 175703 (2020).
29. Superconducting behavior of a new metal iridate compound, SrIr2, under pressure
Xiaofan Yang, Huan Li, Tong He, Tomoya Taguchi, Yanan Wang, Hidenori Goto, Ritsuko Eguchi, Rie Horie, Kazumasa Horigane, Kaya Kobayashi, Jun Akimitsu, Hirofumi Ishii, Yen-Fa Liao, Hitoshi Yamaoka and Yoshihiro Kubozono
Journal of Physics: Condensed Matter 32, 025704 (2019).
28. Pressure-induced superconductivity in Bi2-xSbxTe3-ySey
Tong He, Xiaofan Yang, Tomoya Taguchi, Teppei Ueno, K. Kobayashi, Jun Akimitsu, Hitoshi Yamaoka, Hirofumi Ishii, Yen-Fa Liao, Hiromi Ota, Hidenori Goto, Ritsuko Eguchi, Kensei Terashima, Takayoshi Yokoya, Harald O. Jeschke, Xianxin Wu, and Yoshihiro Kubozono,
Phys. Rev. B 100, 094525 (2019).
27. Fermi level tuning of Ag-doped Bi2Se3 topological insulator
Eri Uesugi, Takaki Uchiyama, Hidenori Goto, Hiromi Ota, Teppei Ueno, Hirokazu Fujiwara, Kensei Terashima, Takayoshi Yokoya, Fumihiko Matsui, Jun Akimitsu, K. Kobayashi and Yoshihiro Kubozono,
Scientific Reports 9, 5376 (2019).
26. Determination of the local structure of Sr2-xMxIrO4 (M = K, La) as a function of doping and temperature
K. Terashima, E. Paris, E. Salas-Colera, L. Simonelli, B. Joseph, T. Wakita, K. Horigane, M. Fujii, K. Kobayashi, R. Horie, J. Akimitsu, Y. Muraoka, T. Yokoya and N. L. Saini,
Phys. Chem. Chem. Phys. 20, 23783-23788 (2018).
25. Enhanced superconducting transition temperatures in the rocksalt-type superconductors In1-xSnxTe (x<=0.5)
K. Kobayashi, Yukio Ai, Harald O. Jeschke, and Jun Akimitsu
Phys. Rev. B 97, 104511 (2018).
24. Pressure-induced superconductivity in AgxBi2-xSe3
Tong He, Xiaofan Yang, Takahiro Terao, Takaki Uchiyama, Teppei Ueno, K. Kobayashi, Jun Akimitsu, Takafumi Miyazaki, Takumi Nishioka, Koji Kimura, Kouichi Hayashi, Naohisa Happo, Hitoshi Yamaoka, Hirofumi Ishii, Yen-Fa Liao, Hiromi Ota, Hidenori Goto, and Yoshihiro Kubozono,
Phys. Rev. B 97, 104503 (2018).
23. Magnetic phase diagram of Sr2-xLaxIrO4 synthesized by mechanical alloying
K. Horigane, M. Fujii, H. Okabe, K. Kobayashi, R. Horie, H. Ishii, Y. F. Liao, Y. Kubozono, A. Koda, R. Kadono, and J. Akimitsu,
Phys. Rev. B 97, 064425 (2018).
22. Crystal structure and superconducting properties of KSr2Nb3O10
T. Kawaguchi K. Horigane, Y. Itoh, K. Kobayashi, R. Horie, T. Kambe, J. Akimitsu,
Physica B: Condensed Matter, 536, 830-832 (2018).
21. Electronic structure of Ag1-xSn1+xSe2 (x = 0.0, 0.1, 0.2, 0.25 and 1.0)
Takanori Wakita, Eugenio Paris, K. Kobayashi, Kensei Terashima, Muammer Yasin Hacisalihoğlu, Teppei Ueno, Federica Bondino, Elena Magnano, Igor Píš, Luca Olivi, Jun Akimitsu, Yuji Muraoka, Takayoshi Yokoya, and Naurang L. Saini,
Phys. Chem. Chem. Phys., 19, 26672-26678 (2017).
20. Observation of current-induced bulk magnetization in elemental tellurium
T. Furukawa, Y. Shimokawa, K. Kobayashi, T. Itou
19. Evolution of the remnant Fermi-surface state in the lightly doped correlated spin-orbit insulator Sr2-xLaxIrO4
K. Terashima, M. Sunagawa, H. Fujiwara, T. Fukura, M. Fujii, K. Okada, K. Horigane, Kaya Kobayashi, R. Horie, J. Akimitsu, E. Golias, D. Marchenko, A. Varykhalov, N. L. Saini, T. Wakita, Y. Muraoka, and T. Yokoya,
Phys. Rev. B 96, 041106(R) (2017).
18. Unusual upper critical field behavior in Nb-doped bismuth selenides
Kaya Kobayashi, T. Ueno, H. Fujiwara, T. Yokoya, J. Akimitsu
Phys. Rev. B 95, 180503(R) (2017).
1. Evidence for One-Dimensional Charge Transport in the Stripe Ordered Phase of La2-x-yNdySrxCuO4
Takuya Noda, Kaya Kobayashi, Hiroshi Eisaki, Shin-ichi Uchida
Advances in Superconductivity XII. pp155-157, Springer, Tokyo (Yamashita T., Tanabe K. (eds))
2. Angular Dependent Magnetotransport and Electronic Structure in Quasi-One-Dimensional Organic Conductor (TMTSF)2ClO4
Kaya Kobayashi and Toshihito Osada
Synthetic Metals 120, 1029-1030 (2001).
3. Electric Field Effect on Magnetoresistance Angular Effects: New Tool to Study Mass Renormalization in Quasi-One-Dimensional Organic Conductors
Kaya Kobayashi, Eiji Ohmichi, and Toshihito Osada,
J. Phys. Chem. Solids 63, No.6-8, 1267-1271 (2002).
4. Influence of Interlayer and Interchain Coherence on Magnetoresistance Angular Effects in Q1D Conductors
T. Osada, Kaya Kobayashi, and E. Ohmichi,
Synthetic Metals 135-136, 653-654 (2003).
5. Tunneling Picture of Interlayer Magnetotransport in Multilayer Systems
T. Osada, M. Kuraguchi, Kaya Kobayashi, and E. Ohmichi,
6. Growth and Transport Measurement of (TMTSF)2PF6/(TMTSF)2ClO4 Hetero-Junctions
Kaya Kobayashi, E. Ohmichi, and T. Osada,
Synthetic Metals 135-136, 679-680 (2003).
7. Electric Field Effect on Magnetoresistance Angular Effects in Low-Dimensional Organic Conductorss
Kaya Kobayashi, E. Ohmichi, and T. Osada,
Synthetic Metals 133-134, 71-73 (2003).
8. Electric Field Effect on Magnetoresistance Angular Effects in Low-Dimensional Organic Conductorss
Kaya Kobayashi, M. Saito, E. Ohmichi, and T. Osada,
9. Quantum Features of Angular Dependent Magnetoresistance Oscillations in Quasi-Two-Dimensional Conductors near High Magnetic Field Quantum Limit
Kaya Kobayashi and Toshihito Osada,
Synthetic Metals 155, 670-673 (2005).
10. Electric-Field Effect on the Angle-Dependent Magnetotransport Properties of Quasi-One-Dimensional Conductors
Kaya Kobayashi, M. Saito, E. Ohmichi, and T. Osada,
Phys. Rev. Lett. 96, 126601 (2006).
11. Growth and observation of micro organic crystals in two-dimensional glass nanovolume cell
Kaya Kobayashi, H. Koyama, K. Ishikura, and T. Mitsui,
Appl. Phys. Lett.,93, 143114 (2008).
12. Instability of charge ordered states probed in mesoscopic theta-(BEDT-TTF)2RbZn(SCN)4 crystals
Kaya Kobayashi and N. Uchida,
Phys. Stat. Soli. (c) 9, 1167-1170 (2012).
13. Observation of Orbital Resonance Hall Effect in (TMTSF)2ClO4
Kaya Kobayashi, H. Satsukawa, J. Yamada, T. Terashima, and S. Uji
Phys. Rev. Lett. 112, 116805 (2014).
14. Investigation of Mechanical Agitation in the Dynamics of the Electrochemical Growth of Organic Crystals in a Nanoliter Cell
Kaya Kobayashi,
Adv. Mater. Inter., 1, 1400096 (2014)
15. Magnetic properties of chalcopyrite Cu1-xFeS2 at low temperatures
Kaya Kobayashi, Y. Azuma, K. Kawashima, K. Horigane, M. Akaki, M. Tokunaga, and J. Akimitsu,
JPS Conf. Proc. 3, 017020 (2014).
16. Anomalous local spin susceptibilities in non-centrosymmetric La2C3 superconductor
A. Potocnik, P. Jeglic, Kaya Kobayashi, K. Kawashima, S. Kuchida, J. Akimitsu, D. Arcon,
Phys. Rev. B 90, 104507 (2014)
17. Metallic Binary Copper Chalcogenides with Orthorhombic Layered Structure
Kaya Kobayashi, Shinya Kawamoto and Jun Akimitsu,