Successive phase transitions and energy-gap formation in CeRhAs

Physical Review B - Condensed Matter and Materials Physics Volume 66 Issue 4 Page 041103-1-041103-4 published_at 2002-07-16
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Title ( eng )
Successive phase transitions and energy-gap formation in CeRhAs
Creator
Sasakawa Tetsuya
Suemitsu T.
Bando Yoshio
Jung M. H.
Fujita Toshizo
Nakajima Motoki
Iwasa Kazuaki
Kohgi Masafumi
Paul Ch.
Berger St.
Bauer Ernst D.
Source Title
Physical Review B - Condensed Matter and Materials Physics
Volume 66
Issue 4
Start Page 041103-1
End Page 041103-4
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.
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2002-07-16
Rights
Copyright (c) 2002 American Physical Society.
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0163-1829
[DOI] 10.1103/PhysRevB.66.041103
[NCID] AA00362255
[DOI] http://dx.doi.org/10.1103/PhysRevB.66.041103