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Thermal double donors and quantum dots

Lookup NU author(s): Dr Jose Coutinho, Professor Patrick Briddon


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Combined local mode spectroscopy and ab initio modeling are used to demonstrate for the first time that oxygen atoms in thermal double donors (TDD) in Si are in close proximity. The observed vibrational modes in O-16,O-18, and mixed isotopic samples are consistent with a model involving [110] aligned oxygen chains made up of an insulating core lying between electrically active ends. The model also explains the minute spin density observed on oxygen in TDD+ as well as the piezospectroscopic tensors of the donors. The analogy between the thermal donors and quantum dots is emphasized.

Publication metadata

Author(s): Coutinho J, Jones R, Murin LI, Markevich VP, Lindstrom JL, Oberg S, Briddon PR

Publication type: Article

Publication status: Published

Journal: Physical Review Letters

Year: 2001

Volume: 8723

Issue: 23

ISSN (print): 0031-9007

ISSN (electronic): 1079-7114

Publisher: American Physical Society