Successive phase transitions and energy-gap formation in CeRhAs

被引：37

作者：

Sasakawa, T ^{[1
]}

Suemitsu, T

Takabatake, T

Bando, Y

Umeo, K

Jung, MH

Sera, M

Suzuki, T

Fujita, T

Nakajima, M

Iwasa, K

Kohgi, M

Paul, C

Berger, S

Bauer, E

机构：

[1] Hiroshima Univ, Dept Quantum Matter, ADSM, Higashihiroshima 7398530, Japan

[2] Kure Natl Coll Technol, Dept Elect Engn, Kure 7378506, Japan

[3] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

[4] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.66.041103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic, transport, and x-ray diffraction measurements on single-crystal CeRhAs, the so-called Kondo insulator, have revealed successive transitions at T-1=370, T-2=235, and T-3=165 K. Below T-1, the unit cell is doubled along the b and c axes. Thereby, the resistivity jumps upwards and magnetic susceptibility in all the directions drops. Superlattice reflections at (0,1/3,1/3) and (1/3,0,0) appear at T<T-2. The latter suddenly increases below T-3 where a transport gap is enhanced. These observations indicate that the gap formation is intimately related to lattice modulations.

引用

页码：411031 / 411034

页数：4

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