Anomalous thermopower and Nernst effect in CeColn5: Loss of entropy current in precursor state

Y. Onose, Lu Li, C. Petrovic, N. P. Ong

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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.

Original languageEnglish (US)
Article number17006
Issue number1
StatePublished - Jul 1 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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