Successive phase transitions and energy-gap formation in CeRhAs

T. Sasakawa, T. Suemitsu, T. Takabatake, Y. Bando, K. Umeo, M. H. Jung, M. Sera, T. Suzuki, T. Fujita, M. Nakajima, K. Iwasa, M. Kohgi, Ch Paul, St Berger, E. Bauer

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

Magnetic, transport, and x-ray diffraction measurements on single-crystal CeRhAs, the so-called Kondo insulator, have revealed successive transitions at T1 = 370, T2 = 235, and T3 = 165 K. Below T1, 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<T2. The latter suddenly increases below T3 where a transport gap is enhanced. These observations indicate that the gap formation is intimately related to lattice modulations.

Original languageEnglish
Article number041103
Pages (from-to)411031-411034
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number4
DOIs
Publication statusPublished - 2002 Jul 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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