Specific Heat of Two-Dimensional Electrons in GaAs-GaAlAs Multilayers
E. GornikInstitut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, AustriaR. LassnigInstitut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, AustriaG. StrasserInstitut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, AustriaH. L. StörmerInstitut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, AustriaA. C. GossardInstitut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, AustriaW. WiegmannInstitut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria
1985en
ABI
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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.
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