125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2

被引：77

作者：

Tokunaga, Yo ^{[1
]}

Sakai, Hironori ^{[1
]}

Kambe, Shinsaku ^{[1
]}

Hattori, Taisuke ^{[1
]}

Higa, Nonoka ^{[1
]}

Nakamine, Genki ^{[2
]}

Kitagawa, Shunsaku ^{[2
]}

Ishida, Kenji ^{[2
]}

Nakamura, Ai ^{[3
]}

Shimizu, Yusei ^{[3
]}

Homma, Yoshiya ^{[3
]}

Li, DeXin ^{[3
]}

Honda, Fuminori ^{[3
]}

Aoki, Dai ^{[3
,4
]}

机构：

[1] Japan Atom Energy Agcy, ASRC, Tokai, Ibaraki 3191195, Japan

[2] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[3] Tohoku Univ, IMR, Oarai, Ibaraki 3111313, Japan

[4] Univ Grenoble Alpes, CEA, IRIG PHELIQS, F-38000 Grenoble, France

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2019年 / 88卷 / 07期

关键词：

FERROMAGNETISM; COEXISTENCE; FIELD;

D O I：

10.7566/JPSJ.88.073701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report Te-125 NMR studies on a newly discovered heavy fermion superconductor UTe2. Using a single crystal, we have measured the Te-125 NMR Knight shift K and spin lattice relaxation rate 1/T-1 for fields along the three orthorhombic crystal axes. The data confirm a moderate Ising anisotropy for both the static (K) and dynamical susceptibilities (1/T-1) in the paramagnetic state above about 20K. Around 20K, however, we have observed a sudden loss of NMR spin-echo signal due to sudden enhancement of the NMR spin-spin relaxation rate 1/T-2, when the field is applied along the easy axis of magnetization (= a-axis). This behavior suggests the development of longitudinal magnetic fluctuations along the a-axis at very low frequencies below 20 K.

引用

页数：4

共 36 条

[1] Coexistence of superconductivity and ferromagnetism in URhGe [J].

Aoki, D ;

Huxley, A ;

Ressouche, E ;

Braithwaite, D ;

Flouquet, J ;

Brison, JP ;

Lhotel, E ;

Paulsen, C .

NATURE, 2001, 413 (6856) :613-616

[2] Unconventional Superconductivity in Heavy Fermion UTe2 [J].

Aoki, Dai ;

Nakamura, Ai ;

Honda, Fuminori ;

Li, DeXin ;

Homma, Yoshiya ;

Shimizu, Yusei ;

Sato, Yoshiki J. ;

Knebel, Georg ;

Brison, Jean-Pascal ;

Pourret, Alexandre ;

Braithwaite, Daniel ;

Lapertot, Gerard ;

Niu, Qun ;

Valiska, Michal ;

Harima, Hisatomo ;

Flouquet, Jacques .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2019, 88 (04)

[3] Superconductivity and Ferromagnetic Quantum Criticality in Uranium Compounds [J].

Aoki, Dai ;

Flouquet, Jacques .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2014, 83 (06)

[4] Ferromagnetism and Superconductivity in Uranium Compounds [J].

Aoki, Dai ;

Flouquet, Jacques .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2012, 81 (01)

[5] Extremely Large and Anisotropic Upper Critical Field and the Ferromagnetic Instability in UCoGe [J].

Aoki, Dai ;

Matsuda, Tatsuma D. ;

Taufour, Valentin ;

Hassinger, Elena ;

Knebel, Georg ;

Flouquet, Jacques .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2009, 78 (11)

[6] Anisotropic Spin Fluctuations and Superconductivity in "115" Heavy Fermion Compounds: 59Co NMR Study in PuCoGa5 [J].

Baek, S. -H. ;

Sakai, H. ;

Bauer, E. D. ;

Mitchell, J. N. ;

Kennison, J. A. ;

Ronning, F. ;

Thompson, J. D. .

PHYSICAL REVIEW LETTERS, 2010, 105 (21)

[7] COEXISTENCE OF P-STATE SUPERCONDUCTIVITY AND ITINERANT FERROMAGNETISM [J].

FAY, D ;

APPEL, J .

PHYSICAL REVIEW B, 1980, 22 (07) :3173-3182

[8] P-wave superconductivity in the ferromagnetic superconductor URhGe [J].

Hardy, F ;

Huxley, AD .

PHYSICAL REVIEW LETTERS, 2005, 94 (24)

[9] p-wave superconductivity near a transverse saturation field [J].

Hattori, K. ;

Tsunetsugu, H. .

PHYSICAL REVIEW B, 2013, 87 (06)

[10] Superconductivity Induced by Longitudinal Ferromagnetic Fluctuations in UCoGe [J].

Hattori, T. ;

Ihara, Y. ;

Nakai, Y. ;

Ishida, K. ;

Tada, Y. ;

Fujimoto, S. ;

Kawakami, N. ;

Osaki, E. ;

Deguchi, K. ;

Sato, N. K. ;

Satoh, I. .

PHYSICAL REVIEW LETTERS, 2012, 108 (06)

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