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Pressure‐induced superconductivity in CePd 5 Al 2 and CeRhGe 2 , new family of heavy fermion superconductors
Author(s) -
Honda Fuminori,
Yoshiuchi Shingo,
Hirose Yusuke,
Nakamura Taichi,
Yamamoto Etsuji,
Tateiwa Naoyuki,
Haga Yoshinori,
Takeuchi Tetsuya,
Settai Rikio,
Ōnuki Yoshichika
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200983055
Subject(s) - superconductivity , condensed matter physics , tetragonal crystal system , electrical resistivity and conductivity , anisotropy , critical field , fermi level , heavy fermion , physics , materials science , phase (matter) , electron , quantum mechanics
Antiferromagnets CePd 5 Al 2 and CeRhGe 2 with the quasi‐two dimensional electronic state have been found to become superconductive by measuring the electrical resistivity under pressure. In these compounds, the Néel temperature decreases at high pressure and becomes approximately zero at critical pressure P c = 9 GPa in CePd 5 Al 2 and P c = 7 GPa in CeRhGe 2 . Superconductivity was observed around P c . In CePd 5 Al 2 , the upper critical field H c2 is found to be highly anisotropic among H || [001] and [100], reflecting nearly cylindrical Fermi surfaces along the tetragonal [001] direction.