Observation of valence-band Landau-level mixing by resonant magnetotunneling

A. Zaslavsky, D. A. Grützmacher, S. Y. Lin, T. P. Smith, R. A. Kiehl, T. O. Sedgwick

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In magnetotunneling I(V,B) measurements on strained p-type Si/Si1-xGex double-barrier resonant tunneling structures we observe heavy-hole satellite peaks that correspond to tunneling with Δn=1 and 2 changes in the Landau index n. The relative intensity of the satellite peaks excludes scattering as a possible mechanism. We ascribe the Δn=1,2 satellites to elastic tunneling made possible by Landau-level mixing in the valence band predicted by the Luttinger Hamiltonian in a magnetic field. The satellite peak spacing yields the valence-band Landau-level structure in strained Si1-xGex quantum wells.

Original languageEnglish (US)
Pages (from-to)16036-16039
Number of pages4
JournalPhysical Review B
Issue number23
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Zaslavsky, A., Grützmacher, D. A., Lin, S. Y., Smith, T. P., Kiehl, R. A., & Sedgwick, T. O. (1993). Observation of valence-band Landau-level mixing by resonant magnetotunneling. Physical Review B, 47(23), 16036-16039. https://doi.org/10.1103/PhysRevB.47.16036