TY - JOUR
T1 - Anomalous thermopower and Nernst effect in CeColn5
T2 - Loss of entropy current in precursor state
AU - Onose, Y.
AU - Li, Lu
AU - Petrovic, C.
AU - Ong, N. P.
PY - 2007/7/1
Y1 - 2007/7/1
N2 - The heavy-electron superconductor CeCoIn5 exhibits a puzzling precursor state above its superconducting critical temperature at T c≤2.3 K. The thermopower and Nernst signal are anomalous. Below 15 K, the entropy current of the electrons undergoes a steep decrease reaching ∼0 at Tc. Concurrently, the off-diagonal thermoelectric current αxy is enhanced. The delicate sensitivity of the zero-entropy state to field implies phase coherence over large distances. The prominent anomalies in the thermoelectric current contrast with the relatively weak effects in the resistivity and magnetization.
AB - The heavy-electron superconductor CeCoIn5 exhibits a puzzling precursor state above its superconducting critical temperature at T c≤2.3 K. The thermopower and Nernst signal are anomalous. Below 15 K, the entropy current of the electrons undergoes a steep decrease reaching ∼0 at Tc. Concurrently, the off-diagonal thermoelectric current αxy is enhanced. The delicate sensitivity of the zero-entropy state to field implies phase coherence over large distances. The prominent anomalies in the thermoelectric current contrast with the relatively weak effects in the resistivity and magnetization.
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U2 - 10.1209/0295-5075/79/17006
DO - 10.1209/0295-5075/79/17006
M3 - Article
AN - SCOPUS:79051471343
VL - 79
JO - Journal de Physique (Paris), Lettres
JF - Journal de Physique (Paris), Lettres
SN - 0295-5075
IS - 1
M1 - 17006
ER -