Publications

  1. "Realization of interlayer ferromagnetic interaction in MnSb2Te4 toward the magnetic Weyl semimetal state"
    T. Murakami, Y. Nambu, T. Koretsune, G. Xiangyu, T. Yamamoto, C.M. Brown, and H. Kageyama
    Physical Review B 100, 195103 (2019).

  2. "A Semimetallic State in La3Ir3O11 with the KSbO3 Structure"
    T. Aoyama, K. Emi, C. Tabata, Y. Nambu, H. Nakao, T. Yamauchi, and K. Ohgushi
    Journal of the Physical Society of Japan 88, 093706 (2019).

  3. "Deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow"
    D. Okuyama, M. Bleue, J.S. White, Q. Ye, J. Krzywon, G. Nagy, Z.Q. Im, I. Živković, M. Bartkowiak, H.M. Rønnow, S. Hoshino, J. Iwasaki, N. Nagaosa, A. Kikkawa, Y. Taguchi, Y. Tokura, D. Higashi, J.D. Reim, Y. Nambu, and T.J. Sato
    Communications Physics 2, 79 (2019).

  4. "Polar state induced by block-type lattice distortions in BaFe2Se3 with quasi-one-dimensional ladder structure"
    T. Aoyama, S. Imaizumi, T. Togashi, Y. Sato, K. Hashizume, Y. Nambu, Y. Hirata, M. Matsubara, and K. Ohgushi
    Physical Review B 99, 241109(R) (2019).

  5. "Magnetic structure and high-field magnetization of the distorted kagome lattice antiferromagnet Cs2Cu3SnF12"
    K. Matan, T. Ono, G. Gitgeatpong, K. de Roos, P. Miao, S. Torii, T. Kamiyama, A. Miyata, A. Matsuo, K. Kindo, S. Takeyama, Y. Nambu, P. Piyawongwatthana, T. J. Sato, and H. Tanaka
    Physical Review B 99, 224404 (2019).

  6. "梯子型鉄系化合物BaFe2S3における圧力誘起超伝導 (Pressure-induced superconductivity in Fe-based ladder material BaFe2S3)" (in Japanese)
    山内徹 (T. Yamauchi), 平田靖透 (Y. Hirata), 高橋博樹 (H. Takahashi), 南部雄亮 (Y. Nambu), 佐藤卓 (T.J. Sato), and 大串研也 (K. Ohgushi)
    固体物理 (Solid State Physics) 54, 27 (2019).

  7. "High-pressure electrical resistivity studies for Ba1-xCsxFe2Se3"
    C. Kawashima, H. Soeda, H. Takahashi, T. Hawai, Y. Nambu, T.J. Sato, Y. Hirata, and K. Ohgushi
    Journal of Physics: Conference Series 950, 042031/042034 (2017).

  8. "Development of a polarized 3He neutron spin filter for POLANO at J-PARC"
    T. Ino, M. Ohkawara, K. Ohoyama, T. Yokoo, S. Itoh, Y. Nambu, M. Fujita, H. Kira, H. Hayashida, K. Hiroi, K. Sakai, T. Oku, and K. Kakurai
    Journal of Physics: Conference Series 862, 012011 (2017).

  9. "Impact of minute-time-scale kinetics on the stabilization of the skyrmion-lattice in Cu2OSeO3"
    J.D. Reim, K. Makino, D. Higashi, Y. Nambu, D. Okuyama, T.J. Sato, E.P. Gilbert, N. Booth, and S. Seki
    Journal of Physics: Conference Series 828, 012004 (2017).

  10. "Thermal stability and irreversibility of skyrmion-lattice phases in Cu2OSeO3"
    K. Makino, J.D. Reim, D. Higashi, D. Okuyama, T.J. Sato, Y. Nambu, E.P. Gilbert, N. Booth, S. Seki, and Y. Tokura
    Physical Review B 95, 134412 (2017).

  11. "Pressure-Induced Metallization in Iron-Based Ladder Compounds Ba1-xCsxFe2Se3"
    T. Hawai, C. Kawashima, K. Ohgushi, K. Matsubayashi, Y. Nambu, Y. Uwatoko, T.J. Sato, and H. Takahashi
    Journal of the Physical Society of Japan 86, 024701 (2017).

  12. "Magnetic Reversal of Electric Polarization with Fixed Chirality of Magnetic Structure in a Chiral-Lattice Helimagnet MnSb2O6"
    M. Kinoshita, S. Seki, T.J. Sato, Y. Nambu, T. Hong, M. Matsuda, H.B. Cao, S. Ishiwata, and Y. Tokura
    Physical Review Letters 117, 047201 (2016).

  13. "Science from the initial operation of HRC"
    S. Itoh, T. Yokoo, T. Masuda, H. Yoshizawa, M. Soda, Y. Ikeda, S. Ibuka, D. Kawana, T.J. Sato, Y. Nambu, K. Kuwahara, S. Yano, J. Akimitsu, Y. Kaneko, Y. Tokura, M. Fujita, M. Hase, K. Iwasa, H. Hiraka, T. Fukuda, K. Ikeuchi, K. Yoshida, T. Yamaguchi, K. Ono, and Y. Endoh
    Journal of the Physical Society of Japan Conference Proceedings 8, 034001 (2015).

  14. "Spin Fluctuations from Hertz to Terahertz on a Triangular Lattice"
    Y. Nambu, J.S. Gardner, D.E. MacLaughlin, C. Stock, H. Endo, S. Jonas, T.J. Sato, S. Nakatsuj, and C. Broholm
    Physical Review Letters 115, 127202 (2015).

  15. "Pressure-induced Superconductivity in the Iron-based Ladder Material BaFe2S3"
    H. Takahashi, A. Sugimoto, Y. Nambu, T. Yamauchi, Y. Hirata, T. Kawakami, M. Avdeev, K. Matsubayashi, F. Du, C. Kawashima, H. Soeda, S. Nakano, Y. Uwatoko, Y. Ueda, T.J. Sato, and K. Ohgushi
    Nature Materials 14, 1008 (2015).

  16. "Temperature and composition phase diagram in the iron-based ladder compounds Ba1-xCsxFe2Se3"
    T. Hawai, Y. Nambu, K. Ohgushi, F. Du, Y. Hirata, M. Avdeev, Y. Uwatoko, Y. Sekine, H. Fukazawa, J. Ma, S. Chi, Y. Ueda, H. Yoshizawa, and T.J. Sato
    Physical Review B 91, 184416 (2015).

  17. "中性子散乱を用いた次元性の異なる物質からの鉄系超伝導へのアプローチ (Approach to the iron-based superconductivity through neutron scattering on separate dimensional materials)" (in Japanese)
    南部雄亮 (Y. Nambu)
    波紋 (HAMON) 25, 141 (2015).

  18. "籠目格子反強磁性体での特異な量子効果―磁気励起に現れる負の量子規格化― (Unusual Quantum Effect on the Spin Wave Excitations)" (in Japanese)
    小野俊雄 (T. Ono), K. Matan, 南部雄亮 (Y. Nambu), 佐藤卓 (T.J. Sato), and 田中秀数 (H. Tanaka)
    固体物理 (Solid State Physics) 49, 671 (2014).

  19. "Anisotropic in-plane spin correlation in the parent and Co-doped BaFe2As2: a neutron scattering study"
    S. Ibuka, Y. Nambu, T. Yamazaki, M.D. Lumsden, and T.J. Sato
    Physica C 507, 25 (2014).

  20. "Large Negative Quantum Renormalization of Excitation Energies in the Spin-1/2 Kagome Lattice Antiferromagnet Cs2Cu3SnF12"
    T. Ono, K. Matan, Y. Nambu, T.J. Sato, K. Katayama, S. Hirata, and H. Tanaka
    Journal of the Physical Society of Japan 83, 043701 (2014).
    JPSJ Editors' Choice

  21. "Ghost modes and continuum scattering in the dimerized distorted kagome lattice antiferromagnet Rb2Cu3SnF12"
    K. Matan, Y. Nambu, Y. Zhao, T.J. Sato, Y. Fukumoto, T. Ono, H. Tanaka, C. Broholm, A. Podlesnyak, and G. Ehlers
    Physical Review B 89, 024414 (2014).

  22. "Structural and magnetic properties in the quantum S = 1/2 dimer systems Ba3(Cr1-xVx)2O8 with site disorder"
    T. Hong, L.Y. Zhu, X. Ke, V.O. Garlea, Y. Qiu, Y. Nambu, H. Yoshizawa, M. Zhu, G.E. Granroth, A.T. Savici, Z. Gai, and H.D. Zhou
    Physical Review B 87, 144427 (2013).

  23. "三角格子反強磁性体NiGa2S4の二次元磁性 (Two-Dimensional Magnetism in the Triangular Antiferromagnet NiGa2S4)" (in Japanese)
    特集: フラストレーション (Special Issue: Frustration)
    南部雄亮 (Y. Nambu)
    波紋 (HAMON) 23, 19 (2013).

  24. "Ferroquadrupolar ordering in PrTi2Al20"
    T.J. Sato, S. Ibuka, Y. Nambu, T. Yamazaki, T. Hong, A. Sakai, and S. Nakatsuji
    Physical Review B 86, 184419 (2012).

  25. "Spin dynamics and spin freezing in the triangular lattice antiferromagnets FeGa2S4 and NiGa2S4"
    S. Zhao, P. Dalmas de Réotier, A. Yaouanc, D.E. MacLaughlin, J.M. Mackie, O.O. Bernal, Y. Nambu, T. Higo, and S. Nakatsuji
    Physical Review B 86, 064435 (2012).

  26. "Stripelike magnetism in a mixed-valence insulating state of Fe-based ladder compound CsFe2Se3"
    F. Du, K. Ohgushi, Y. Nambu, T. Kawakami, M. Avdeev, Y. Hirata, Y. Watanabe, T.J. Sato, and Y. Ueda
    Physical Review B 85, 214436 (2012).

  27. "中性子散乱による磁気構造解析 (Magnetic Structure Analysis by Neutron Diffraction Techniques)" (in Japanese)
    特集「中性子による構造解析の最前線」 (Special Issue: Characterization of Materials by Frontier Neutron Techniques)
    南部雄亮 (Y. Nambu)
    表面科学 (Journal of the Surface Science Society of Japan) 33, 302 (2012).

  28. "Evidence for an exotic magnetic transition in the triangular spin system FeGa2S4"
    P. Dalmas de Réotier, A. Yaouanc, D.E. MacLaughlin, S. Zhao, T. Higo, S. Nakatsuji, Y. Nambu, C. Marin, A. Amato, and C. Baines
    Physical Review B 85, 140407(R) (2012).

  29. "Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3"
    Y. Nambu, K. Ohgushi, S. Suzuki, F. Du, M. Avdeev, Y. Uwatoko, K. Munakata, H. Fukazawa, S. Chi, Y. Ueda, and T.J. Sato
    Physical Review B 85, 064413 (2012).

  30. "鉄系化合物における磁気構造-CaFe4As3の複雑な磁性から (Magnetic Structures of Iron-based Materials: Through Complex Magnetism of CaFe4As3)" (in Japanese)
    南部雄亮 (Y. Nambu)
    波紋 (HAMON) 21, 160 (2011).

  31. "Erratum: Incommensurate Magnetism in FeAs Strips: Neutron Scattering from CaFe4As3 [Phys. Rev. Lett. 106, 037201 (2011).]"
    Y. Nambu, L.L. Zhao, E. Morosan, K. Kim, G. Kotliar, P. Zajdel, M.A. Green, W. Ratcliff, J.A. Rodriguez-Rivera, and C. Broholm
    Physical Review Letters 107, 059903(E) (2011).

  32. "Successive phase transitions and phase diagrams for the quasi-two-dimensional easy-axis triangular antiferromagnet Rb4Mn(MoO4)3"
    R. Ishii, S. Tanaka, K. Onuma, Y. Nambu, M. Tokunaga, T. Sakakibara, N. Kawashima, Y. Maeno, C. Broholm, D.P. Gartreaux, J.Y. Chan, and S. Nakatsuji
    Europhysics Letters 94, 17001 (2011).

  33. "Two-dimensional magnetism and spin-size effect in the S = 1 triangular antiferromagnet NiGa2S4"
    (Special Issue on Geometrically Frustrated Magnetism)
    Y. Nambu and S. Nakatsuji
    Journal of Physics: Condensed Matter 23, 164202 (2011).

  34. "Incommensurate Magnetism in FeAs Strips: Neutron Scattering from CaFe4As3"
    Y. Nambu, L.L. Zhao, E. Morosan, K. Kim, G. Kotliar, P. Zajdel, M.A. Green, W. Ratcliff, J.A. Rodriguez-Rivera, and C. Broholm
    Physical Review Letters 106, 037201 (2011).

  35. "Neutron-Scattering Measurement of Incommensurate Short-Range Order in Single Crystals of the S = 1 Triangular Antiferromagnet NiGa2S4"
    C. Stock, S. Jonas, C. Broholm, S. Nakatsuji, Y. Nambu, K. Onuma, Y. Maeno, and J.-H. Chung
    Physical Review Letters 105, 037402 (2010).

  36. "Muons and Frustrated Magnetism in NiGa2S4 and Pr2Ir2O7"
    D.E. MacLaughlin, Y. Nambu, Y. Ohta, Y. Machida, S. Nakatsuji, and O.O. Bernal
    Journal of Physics: Conference Series 225, 012031 (2010).

  37. "Separation between Low-Energy Hole Dynamics and Spin Dynamics in a Frustrated Magnet"
    K. Takubo, Y. Nambu, S. Nakatsuji, Y. Wakisaka, T. Sudayama, D. Fournier, G. Levy, A. Damascelli, M. Arita, H. Namatame, M. Taniguchi, and T. Mizokawa
    Physical Review Letters 104, 226404 (2010).

  38. "High-Field ESR and Magnetization of the Triangular Antiferromagnet NiGa2S4"
    H. Yamaguchi, S. Kimura, M. Hagiwara, Y. Nambu, S. Nakatsuji, Y. Maeno, A. Matsuo, and K. Kindo
    Journal of the Physical Society of Japan 79, 054710 (2010).

  39. "Crystal growth, structure, and physical properties of Ln(Cu,Al)12 (Ln = Y, Ce, Pr, Sm, and Yb) and Ln(Cu,Ga)12 (Ln = Y, Gd-Er, and Yb)"
    B.L. Drake, C. Capan, J.Y. Cho, Y. Nambu, K. Kuga, Y.M. Xiong, A.B. Karki, S. Nakatsuji, P.W. Adams, D.P. Young, and J.Y. Chan
    Journal of Physics: Condensed Matter 22, 066001 (2010).

  40. "Novel Geometrical Frustration Effects in the 2D Triangular-Lattice Antiferromagnet NiGa2S4 and Related Compounds"
    (Special Topics: Novel States of Matter Induced by Frustration)
    S. Nakatsuji, Y. Nambu, and S. Onoda
    Journal of the Physical Society of Japan 79, 011003 (2010).

  41. "High-Field and Multi-Frequency ESR in the Two-Dimensional Triangular Lattice Antiferromagnet NiGa2S4"
    H. Yamaguchi, S. Kimura, M. Hagiwara, Y. Nambu, S. Nakatsuji, Y. Maeno, and K. Kindo
    Applied Magnetic Resonance 36, 285 (2009).

  42. "Pressure Dependence of Electrical Transport in the Triangular Antiferromagnetic Insulators FeGa2S4 and Fe2Ga2S5"
    T. Tomita, Y. Nambu, S. Nakatsuji, S. Koeda, M. Hedo, and Y. Uwatoko
    Journal of the Physical Society of Japan 78, 094603 (2009).

  43. "Crystal Growth, Structure, and Physical Properties of Ln(Cu,Ga)13-x (Ln = La-Nd, Eu; x ≈ 0.2)"
    J.Y. Cho, E.L. Thomas, Y. Nambu, C. Capan, A.B. Karki, D.P. Young, S. Nakatsuji, and J.Y. Chan
    Chemistry of Materials 21, 3072 (2009).

  44. "Structural properties of the two-dimensional triangular antiferromagnet NiGa2S4"
    Y. Nambu, R.T. Macaluso, T. Higo, K. Ishida, and S. Nakatsuji
    Physical Review B 79, 214108 (2009).

  45. "Electronic structure study of triangular lattices in FeGa2S4, Fe2Ga2S5, and NiGa2S4: photoemission spectroscopy and Hartree-Fock calculations"
    K. Takubo, T. Mizokawa, Y. Nambu, and S. Nakatsuji
    Physical Review B 79, 134422 (2009).

  46. "Unconventional spin freezing and fluctuations in the frustrated antiferromagnet NiGa2S4"
    D.E. MacLaughlin, S. Nakatsuji, Y. Nambu, K. Ishida, R.H. Heffner, L. Shu, and O.O. Bernal
    Journal of Physics: Conference Series 145, 012040 (2009).

  47. "Unconventional spin freezing and fluctuations in the frustrated antiferromagnet NiGa2S4"
    D.E. MacLaughlin, Y. Nambu, S. Nakatsuji, R.H. Heffner, L. Shu, O.O. Bernal, and K. Ishida
    Physical Review B 78, 220403(R) (2008).

  48. "Spin Dependent Impurity Effects on the 2D Frustrated Magnetism of NiGa2S4"
    Y. Nambu, S. Nakatsuji, Y. Maeno, E.K. Okudzeto, and J.Y. Chan
    Physical Review Letters 101, 207204 (2008).

  49. "High-field electron spin resonance in the two-dimensional triangular-lattice antiferromagnet NiGa2S4"
    H. Yamaguchi, S. Kimura, M. Hagiwara, Y. Nambu, S. Nakatsuji, Y. Maeno, and K. Kindo
    Physical Review B 78, 180404(R) (2008).

  50. "Synthesis and Characterization of the Quasi-Two-Dimensional Triangular Antiferromagnet Ni1-xMxGa2S4 (M = Mn, Fe, Co, Zn)"
    Y. Nambu, M. Ichihara, Y. Kiuchi, S. Nakatsuji, and Y. Maeno
    Journal of Crystal Growth 310, 1881 (2008).

  51. "Spin dynamics and spin freezing behavior in the two-dimensional antiferromagnet NiGa2S4 revealed by Ga-NMR, NQR and μSR measurements"
    H. Takeya, K. Ishida, K. Kitagawa, Y. Ihara, K. Onuma, Y. Maeno, Y. Nambu, S. Nakatsuji, D.E. MacLaughlin, A. Koda, and R. Kadono
    Physical Review B 77, 054429 (2008).

  52. "Spin Disorder and Order in Quasi-2D Triangular Heisenberg Antiferromagnets: Comparative Study of FeGa2S4, Fe2Ga2S5, and NiGa2S4"
    S. Nakatsuji, H. Tonomura, K. Onuma, Y. Nambu, O. Sakai, Y. Maeno, R.T. Macaluso, and J.Y. Chan
    Physical Review Letters 99, 157203 (2007).

  53. "Unusual Superexchange Pathways in an NiS2 Triangular Lattice with Negative Charge-Transfer Energy"
    K. Takubo, T. Mizokawa, J.-Y. Son, Y. Nambu, K. Onuma, H. Tonomura, S. Nakatsuji, and Y. Maeno
    Physical Review Letters 99, 037203 (2007).

  54. "二次元三角格子上で実現したスピンの無秩序な量子状態 (Spin Disordered State in a Two-Dimensional Triangular Antiferromagnet)" (in Japanese)
    南部雄亮 (Y. Nambu), 中辻知 (S. Nakatsuji), and 前野悦輝 (Y. Maeno)
    日本物理学会誌 (BUTSURI) 62, 254 (2007).

  55. "Coherent behavior without magnetic order of the triangular lattice antiferromagnet NiGa2S4"
    S. Nakatsuji, Y. Nambu, K. Onuma, S. Jonas, C. Broholm, and Y. Maeno
    Journal of Physics: Condensed Matter 19, 145232 (2007).

  56. "Nonmagnetic Impurity Effects on the Spin Disordered State in NiGa2S4"
    Y. Nambu, S. Nakatsuji, and Y. Maeno
    Journal of Magnetism and Magnetic Materials 310, 1316 (2007).

  57. "Slow Inhomogeneous Spin Dynamics in the Frustrated Antiferromagnet NiGa2S4"
    D.E. MacLaughlin, R.H. Heffner, S. Nakatsuji, Y. Nambu, K. Ishida, O.O. Bernal, and L. Shu
    Journal of Magnetism and Magnetic Materials 310, 1300 (2007).

  58. "三角格子反強磁性体NiGa2S4におけるスピン無秩序状態とその不純物効果 (Spin disordered state and its impurity effects in the triangular antiferromagnet NiGa2S4)" (in Japanese)
    南部雄亮 (Y. Nambu)
    物性研究 (Bussei Kenkyu) 86, 573 (2006).

  59. "Coherent Behavior and Nonmagnetic Impurity Effects of Spin Disordered State in NiGa2S4"
    Y. Nambu, S. Nakatsuji, and Y. Maeno
    Journal of the Physical Society of Japan 75, 043711 (2006).

  60. "Spin Disorder on a Triangular Lattice"
    S. Nakatsuji, Y. Nambu, H. Tonomura, O. Sakai, S. Jonas, C. Broholm, H. Tsunetsugu, Y. Qiu, and Y. Maeno
    Science 309, 1697 (2005).