Anomalous amplitude of the quantum oscillations in the longitudinal magneto-thermoelectric power

Longitudinal magneto-thermoelectric power Syy(y) of a pure bismuth single crystal was measured in magnetic fields up to 8T at several fixed temperatures between 1.4 and 15 K to investigate the magneto-phonon effect in the longitudinal magneto-thermoelectric power (MTP). The oscillation patterns of t...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 969; no. 1; pp. 12136 - 12140
Main Author Satoh, N
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2018
Subjects
Amplitudes
Bismuth
Oscillations
Physics
Relaxation time
Single crystals
Temperature
Temperature dependence
Thermoelectricity
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Summary:Longitudinal magneto-thermoelectric power Syy(y) of a pure bismuth single crystal was measured in magnetic fields up to 8T at several fixed temperatures between 1.4 and 15 K to investigate the magneto-phonon effect in the longitudinal magneto-thermoelectric power (MTP). The oscillation patterns of the longitudinal MTP was similar to that of the longitudinal Shubnikov-de Haas (SdH) effect, expectedly. However, the observed amplitude of oscillations showed a curious temperature dependence. That is, in the range of temperature T > 4.2 K, the amplitude has a maximum around 9K, which is well described by considering the inter-Landau level scattering of electrons. On the contrary, in the range of T < 4.2K, the observed amplitude is enhanced markedly although that of the longitudinal SdH oscillations becomes less pronounced by lowering temperature. This discrepancy may be attributed to the effect of the surface (wrapping) current and to the energy dependence of the electron relaxation time.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/969/1/012136