Thermal Response and Decoupling of Excitations at Low Temperatures
The manner in which the interactions (‘coupling’) between excitations in solids (for example, phonons and electrons) vary with parameters such as temperature or magnetic field not only gives information on the density of states, but can also provide for novel measurements of specific heat of a single set of excitations. The particular example of a two-dimensional electron gas confined to a GaAs-AlGaAs single quantum well is discussed, along with preliminary measurements on the decoupling of electrons and phonons in magnetic field at low temperatures.
KeywordsHeat Capacity Electron Temperature Strong Magnetic Field Landau Level Resistive Device
Unable to display preview. Download preview PDF.
- 1.M.J. Graf, B.B. Goldberg, J.S. Brooks, and M. Heiblum, Proceedings of the 19th International Conference on hte Physics of Semiconductors, p.185, W. Zawadzki, ed. ( Polish Academy of Sciences, Warsaw, 1988 ).Google Scholar
- 2.P.F. Sullivan and G. Seidel, Physical Review 173 679 (1968).Google Scholar
- 4.For a review see The Quantum Hall Effect, R.E. Prange and S.M. Girvin eds. (Springer-Verlag, New York 1987).Google Scholar
- 5.A.H. MacDonald, H.C.A. Oji, and K.L. Liu, Phys. Rev. B34 (1986).Google Scholar
- 6.For example, see M. Prasad and M. Singh, Rev. B29 4803 (1984).Google Scholar
- 8.See for example, the work presented by D. Bimberg in this volume.Google Scholar
- 12.V. Lounasmaa, Experimental Principles and Methods Below 1K,( Academic Press, London, 1974 ).Google Scholar