Journal
PHYSICAL REVIEW B
Volume 80, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.081305
Keywords
conduction bands; elemental semiconductors; quantum computing; silicon; silicon compounds
Funding
- CNPq
- FUJB
- Millennium Institute on Nanotechnology-MCT
- FAPERJ
- Ministerio de Ciencia e Innovacion (Spain) through the Ramon y Cajal Program [MAT2006-03741]
- NSA
- LPS through USARO
- NSF
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The conduction band degeneracy in Si is detrimental to quantum computing based on spin qubits, for which a nondegenerate ground orbital state is desirable. This degeneracy is lifted at an interface with an insulator as the spatially abrupt change in the conduction band minimum leads to intervalley scattering. We present a theoretical study of the interface-induced valley splitting in Si that provides simple criteria for optimal fabrication parameters to maximize this splitting. Our work emphasizes the relevance of different interface-related properties to the valley splitting.
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