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Strain-induced quantum ring hole states in a gated vertical quantum dot | Jun Liu
; A. Zaslavsky
; L. B. Freund
; | Date: |
22 Apr 2002 | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | Abstract: | We have experimentally investigated the hole states in a gated vertical strained Si/SiGe quantum dot. We demonstrate the inhomogeneous strain relaxation on the lateral surface creates a ring-like potential near the perimeter of the dot, which can confine hole states exhibiting quantum ring characteristics. The magnetotunneling spectroscopy exhibits the predicted periodicity of energy states in phi/phi0, but the magnitude of the energy shifts is larger than predicted by simple ring theory. Our results suggest a new way to fabricate and study quantum ring structures. | Source: | arXiv, cond-mat/0204457 | Other source: | [GID 351365] pmid12190427 | Services: | Forum | Review | PDF | Favorites |
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