Hole-mediated interactions of Mn acceptors on GaAs (110) (invited)

D. Kitchen, A. Richardella, P. Roushan, J. M. Tang, M. E. Flatt́, A. Yazdani

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

A scanning-tunneling-microscopy-substitution technique is used to incorporate single Mn atoms into Ga sites in GaAs (110) surfaces. The electronic states near a single Mn in the acceptor configuration produce a strong in-gap resonance associated with the acceptor level. The isolated Mn acceptor is probed in both p -type and n -type environments to access the neutral and ionized acceptor configurations. The Mn acceptor at the surface substitution site shares bulk characteristics that compare well with tight-binding calculations. The anisotropic structure of the Mn hole state plays an important role in hole-mediated interactions between the Mn acceptors. Isolated Mn pairs show a strong interaction dependence on crystal orientation and spacing. Certain pair orientations produce a strong splitting of the acceptor level into two levels with bondinglike and antibondinglike symmetries. A tight-binding model relates the acceptor level splitting and the spin-spin interaction energy J.

Original languageEnglish (US)
Article number09G515
JournalJournal of Applied Physics
Volume101
Issue number9
DOIs
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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