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Related Experiment Videos

Giant Nernst effect in CeCoIn5.

R Bel1, K Behnia, Y Nakajima

  • 1Laboratoire de Physique Quantique (CNRS), ESPCI, 10 Rue de Vauquelin, 75231 Paris, France.

Physical Review Letters
|July 13, 2004
PubMed
Summary
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Researchers studied the Nernst and Seebeck coefficients in the heavy-fermion superconductor CeCoIn5. A large Nernst signal, exceeding expectations for conventional metals, was observed, suggesting novel thermoelectricity in strongly interacting electrons.

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Superconductivity

Background:

  • Heavy-fermion superconductors exhibit complex electronic behavior due to strong electron correlations.
  • Understanding thermoelectric properties in superconductors is crucial for exploring novel quantum phenomena.

Purpose of the Study:

  • To investigate the Nernst and Seebeck coefficients in the heavy-fermion superconductor CeCoIn5.
  • To explore the origin of unusual thermoelectric signals in this material.

Main Methods:

  • Experimental measurement of Nernst and Seebeck coefficients.
  • Analysis of thermoelectric response in varying magnetic fields and temperatures.

Main Results:

  • A significant sublinear Nernst signal was observed below 18 K, which is field-dependent.

Related Experiment Videos

  • This Nernst signal magnitude exceeds predictions for conventional multiband Fermi-liquid metals.
  • In the mixed state, the observed Nernst signal dominates over the contribution from superconducting vortex motion.

    • Conclusions:

    • The results indicate a previously unrecognized source of transverse thermoelectricity in strongly correlated electron systems.
    • CeCoIn5 displays unique thermoelectric properties not explained by standard superconducting models.