TY - JOUR
T1 - Successive phase transitions and energy-gap formation in CeRhAs
AU - Sasakawa, T.
AU - Suemitsu, T.
AU - Takabatake, T.
AU - Bando, Y.
AU - Umeo, K.
AU - Jung, M. H.
AU - Sera, M.
AU - Suzuki, T.
AU - Fujita, T.
AU - Nakajima, M.
AU - Iwasa, K.
AU - Kohgi, M.
AU - Paul, Ch
AU - Berger, St
AU - Bauer, E.
PY - 2002/7/15
Y1 - 2002/7/15
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.66.041103
DO - 10.1103/PhysRevB.66.041103
M3 - Article
AN - SCOPUS:4243474595
VL - 66
SP - 411031
EP - 411034
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 4
M1 - 041103
ER -