115In-NQR study of heavy-fermion superconductors Ce2MIn8 (M = Co, Rh)

被引：13

作者：

Fukazawa, Hideto ^{[1
]}

Okazaki, Taishi ^{[1
]}

Hirayama, Kenji ^{[1
]}

Kohori, Yoh ^{[1
]}

Chen, Genfu ^{[2
]}

Ohara, Shigeo ^{[2
]}

Sakamoto, Isao ^{[2
]}

Matsumoto, Takehiko ^{[3
]}

机构：

[1] Chiba Univ, Dept Phys, Chiba 2638522, Japan

[2] Nagoya Inst Technol, Dept Elect & Comp Engn, Nagoya, Aichi 4668555, Japan

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2007年 / 76卷 / 12期

关键词：

nuclear quadrupole resonance; heavy fermion; superconductivity; dimensionality; quantum critical point;

D O I：

10.1143/JPSJ.76.124703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ce2MIn8 (M = Co, Rh) are heavy-fermion compounds: at ambient pressure, Ce2CoIn8 is a superconductor with T-SC = 0.4 K and Ce2RhIn8 is an antiferromagnet with T-N = 2.8 K and Ce2RhIn8 becomes superconducting below 1.4K at 2.0GPa. Their crystal structure can be viewed as successive layers of the heavy-fermion compounds CeMIn5 and CeIn3. In order to determine their physical properties, we perform a nuclear quadrupole resonance (NQR) measurement of In-115 nuclei of Ce2MIn8. The spin-lattice relaxation rate 1/T-1 of Ce2COIn8 decreases with decreasing temperature T and is proportional to T through T-SC. This is in contrast to the T-1/2 dependence of the 1/T-1 of pressurized Ce2RhIn8 above T-SC.

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页数：5

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共 24 条

[1] Pressure-induced superconductivity in ferromagnetic UIr without inversion symmetry [J].

Akazawa, T ;

Hidaka, H ;

Fujiwara, T ;

Kobayashi, TC ;

Yamamoto, E ;

Haga, Y ;

Settai, R ;

Onuki, Y .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (04) :L29-L32

[2] Transport properties of the heavy-fermion superconductor Ce2CoIn8 [J].

Chen, GF ;

Ohara, S ;

Hedo, M ;

Uwatoko, Y ;

Sakamoto, I .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (28) :S2175-S2178

[3] Observation of superconductivity in heavy-fermion compounds of Ce2CoIn8 [J].

Chen, GF ;

Ohara, S ;

Hedo, M ;

Uwatoko, Y ;

Saito, K ;

Sorai, M ;

Sakamoto, I .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2002, 71 (12) :2836-2838

[4] Evidence for spiral magnetic order in the heavy fermion material CeRhIn5 [J].

Curro, NJ ;

Hammel, PC ;

Pagliuso, PG ;

Sarrao, JL ;

Thompson, JD ;

Fisk, Z .

PHYSICAL REVIEW B, 2000, 62 (10) :R6100-R6103

[5] InNQR study of heavy fermion compound Ce2CoIn8 [J].

Fukazawa, H ;

Taira, H ;

Kohori, Y ;

Chen, GF ;

Ohara, S ;

Sakamoto, I .

PHYSICA B-CONDENSED MATTER, 2005, 359 :181-183

[6] Theory on superconductivity of CeIn3 in heavy fermion system [J].

Fukazawa, H ;

Yamada, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2003, 72 (10) :2449-2452

[7] Manometer extension for high pressure measurement:: Nuclear quadrupole resonance study of Cu2O with a modified Bridgman anvil cell up to 10 GPa [J].

Fukazawa, H. ;

Yamatoji, N. ;

Kohori, Y. ;

Terakura, C. ;

Takeshita, N. ;

Tokura, Y. ;

Takagi, H. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2007, 78 (01)

[8] In-NQR study of heavy fermion compounds CeTIn8 (T = Co, Rh) [J].

Fukazawa, Hideto ;

Taira, Hiroshi ;

Kimura, Hidefumi ;

Kohori, Yoh ;

Chen, Genfu ;

Ohara, Shigeo ;

Sakamoto, Isao ;

Matsumoto, Takehiko .

PHYSICA B-CONDENSED MATTER, 2006, 378-80 (107-108) :107-108

[9] Realization of odd-frequency p-wave spin-singlet superconductivity coexisting with antiferromagnetic order near quantum critical point [J].

Fuseya, Y ;

Kohno, H ;

Miyake, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2003, 72 (11) :2914-2923

[10] Pressure-induced superconductivity in quasi-2D CeRhIn5 [J].

Hegger, H ;

Petrovic, C ;

Moshopoulou, EG ;

Hundley, MF ;

Sarrao, JL ;

Fisk, Z ;

Thompson, JD .

PHYSICAL REVIEW LETTERS, 2000, 84 (21) :4986-4989