Observation of subband standing waves in superlattices by low-temperature scanning tunneling spectroscopy

K. Suzuki, K. Kanisawa, S. Perraud, M. Ueki, K. Takashina, Y. Hirayama

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The local density of states (LDOS) of InAs/GaSb long period superlattices was investigated on the cleaved (110) surface at atomic resolution by low-temperature scanning tunneling microscopy and low-temperature scanning tunneling spectroscopy (LT-STS). We present definitive features showing the broken-gap energy band profiles (the overlap of the conduction band of the InAs and the valence band of the GaSb in energy) in the LT-STS spectra complemented by distinct, atomically resolved topographic images. Furthermore, vivid standing waves in LDOS corresponding to the single quantum well-like subband confined in the InAs layer were observed.

Original languageEnglish
Article number081705
JournalJournal of Applied Physics
Volume101
Issue number8
DOIs
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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