Specific Heat of Two-Dimensional Electrons in GaAs-GaAlAs Multilayers

E. Gornik; R. Lassnig; G. Strasser; H. L. Störmer; A. C. Gossard; W. Wiegmann

doi:10.1103/PhysRevLett.54.1820

Specific Heat of Two-Dimensional Electrons in GaAs-GaAlAs Multilayers

E. Gornik, R. Lassnig, G. Strasser, H. L. Störmer, A. C. Gossard, and W. Wiegmann

Phys. Rev. Lett. 54, 1820 – Published 22 April 1985

Abstract

We report the first observation of the magnetic-field-dependent electronic specific heat in GaAs-GaAs multilayers. With a heat-pulse technique oscillations of the sample temperature on the order of millikelvins were observed. Both intra- and inter-Landau-level contributions could be distinguished. Theoretical fits to the data reveal a density of states consisting of Gaussian peaks on a flat background.