Ballistic transport through GaAs-AlGaAs superlattices in transverse magnetic fields

D. Rakoczy, J. Smoliner, R. Heer, G. Strasser

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, ballistic electron transport through the lowest miniband of a biased GaAs-AlGaAs superlattice is investigated in transverse magnetic fields. As method we employ a solid-state version of ballistic electron emission microscopy/spectroscopy using a metal-insulator-metal injector structure that replaces the tip of the scanning tunneling microscope (STM). The ballistic electron current measured as a function of the collector bias shows a peak at flatband conditions indicating coherent transport through the superlattice miniband. With increasing transverse magnetic fields, this peak is quenched and evidence of sequential LO-phonon scattering inside the superlattice is found. Using an extended transfer matrix method, the observed effects are quantitatively explained; differences to previous STM based measurements are discussed. © 2000 American Institute of Physics.
Original languageEnglish
Pages (from-to)3495-3500
Number of pages6
JournalJournal of Applied Physics
Volume88
Issue number6
DOIs
Publication statusPublished - 2000
Externally publishedYes

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