TY - JOUR
T1 - Evolution of pressure-induced heavy fermion state and superconductivity in (formula presented) A high-pressure Fermi surface study
AU - Shishido, H.
AU - Settai, R.
AU - Araki, S.
AU - Ueda, T.
AU - Inada, Y.
AU - Kobayashi, T. C.
AU - Muramatsu, T.
AU - Haga, Y.
AU - Ōnuki, Y.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - Evolution of the pressure-induced heavy fermion state and superconductivity in (formula presented) have been established by high-pressure Fermi surface studies using dHvA technique. The effective mass of the conduction electrons named branch (formula presented) increases from 5.5 (formula presented) at ambient pressure to 20 (formula presented) at 1.6 GPa where superconductivity sets in. This heavy electron mass continues to increase steeply up to 2.1 GPa, 45 (formula presented) at 2.1 GPa, with a concomitant increase of the superconducting transition temperature. However, the underlying Fermi surface remains approximately same even at 2.1 GPa, strongly suggesting that antiferromagnetic fluctuations of Ce moments do not contribute to the volume of the Fermi surface, but enhance the cyclotron mass of the conduction electrons.
AB - Evolution of the pressure-induced heavy fermion state and superconductivity in (formula presented) have been established by high-pressure Fermi surface studies using dHvA technique. The effective mass of the conduction electrons named branch (formula presented) increases from 5.5 (formula presented) at ambient pressure to 20 (formula presented) at 1.6 GPa where superconductivity sets in. This heavy electron mass continues to increase steeply up to 2.1 GPa, 45 (formula presented) at 2.1 GPa, with a concomitant increase of the superconducting transition temperature. However, the underlying Fermi surface remains approximately same even at 2.1 GPa, strongly suggesting that antiferromagnetic fluctuations of Ce moments do not contribute to the volume of the Fermi surface, but enhance the cyclotron mass of the conduction electrons.
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U2 - 10.1103/PhysRevB.66.214510
DO - 10.1103/PhysRevB.66.214510
M3 - Article
AN - SCOPUS:85038307024
SN - 1098-0121
VL - 66
SP - 1
EP - 5
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 21
ER -