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Observation of d-wave scaling relations in the mixed-state specific heat of YBa2Cu3O7

B. Revaz·J. -Y. Genoud·A. Junod·A. Erb·E. Walker
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Abstract

The low temperature specific heat C(B,T) of an YBa2Cu3O7.00 single crystal is measured from 1.2 to 10 K in magnetic fields up to 14 T. The anisotropic component Caniso(T,B)=C(T,B//c)-C(T,B//ab) is a pure vortex quantity obtained directly from experiment. It follows a scaling relation predicted recently for line nodes characteristic of d-wave vortices. Our experimental field and temperature range corresponds to a crossover region where the limit Caniso(T,B)is proportional to T*sqrt(B) does not strictly apply. The variation of the entropy caused by the magnetic field at low T is thermodynamically compatible with measurements near Tc.

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B. Revaz, J. -Y. Genoud, A. Junod, A. Erb, E. Walker. 1997-11-12. Observation of d-wave scaling relations in the mixed-state specific heat of YBa2Cu3O7. https://doi.org/10.1103/physrevlett.80.3364

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