Evidence for a new magnetic field scale in CeCoIn5
Abstract
The Nernst coefficient of CeCoIn5 displays a distinct anomaly at HK ~ 23 T. This feature is reminiscent of what is observed at 7.8 T in CeRu2Si2, a well-established case of metamagnetic transition. New frequencies are observed in de Haas-van Alphen oscillations when the field exceeds 23 T, which may indicate a modification of the Fermi surface at this field.
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