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Silicon Valley Splitting

Schematic Diagram of Valley Splitting in a Silicon Quantum Well

Bulk silicon has a six-fold orbital degneracy that can be lifted by both strain and quantum confinement. Under strain, the six-fold valley degeneracy in the silicon conduction band is reduced to two-fold. Quantum confinement further reduces this degeneracy, resulting in a non-degneratre conduction band minimum.

Selected publications on this topic:

"Fast coherent manipulation of three-electron states in a double quantum dot." Zhan Shi, C. B. Simmons, D. R. Ward, J. R. Prance, X. Wu, Teck Seng Koh, John King Gamble, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Nature Comm. 5, 3020 (2014). [Journal Article | arXiv]

"Semiconductor Quantum Dot Qubits." M. A. Eriksson, S. N. Coppersmith, and M. G. Lagally, MRS Bulletin 38, 794 (2013). [Journal Article]

"Disorder-induced valley-orbit hybrid states in Si quantum dots." John King Gamble, M. A. Eriksson, S. N. Coppersmith, and Mark Friesen, Phys. Rev. B 88, 035310 (2013). [Journal Article | arXiv]

"Silicon Quantum Electronics." F. A. Zwanenburg, Andrew S. Dzurak, Andrea Morello, Michelle Y. Simmons, L. C. L. Hollenberg, Gerhard Klimeck, S. Rogge, S. N. Coppersmith, and M. A. Eriksson, Rev. Mod. Phys. 85, 961 (2013). [Journal Article | arXiv]

"Nanoscale Distortions of Si Quantum Wells in Si/SiGe Quantum-Electronic Heterostructures." Paul G. Evans, D. E. Savage, J. R. Prance, C. B. Simmons, M. G. Lagally, S. N. Coppersmith, M. A. Eriksson, and T. U. Schulli, Advanced Materials 24, 5217 (2012). [Journal Article]

"Tunable singlet-triplet splitting in a few-electron Si/SiGe quantum dot." Zhan Shi, C. B. Simmons, J. R. Prance, John King Gamble, Mark Friesen, D. E. Savage, M. G. Lagally, S. N. Coppersmith, and M. A. Eriksson, Appl. Phys. Lett. 99, 233108 (2011). [Journal Article | arXiv]

"Spectroscopy of few-electron single-crystal silicon quantum dots." Martin Fuechsle, S. Mahapatra, F. A. Zwanenburg, Mark Friesen, M. A. Eriksson, and Michelle Y. Simmons, Nature Nanotech. 5, 502 (2010). [Journal Article]

"Valley splitting in a Si/SiGe quantum point contact." L. M. McGuire, Mark Friesen, K. A. Slinker, S. N. Coppersmith, and M. A. Eriksson, N. Journ. Phys. 12, 033039 (2010). [Journal Article | arXiv]

"Spin blockade and lifetime-enhanced transport in a few-electron Si/SiGe double quantum dot." Nakul Shaji, C. B. Simmons, Madhu Thalakulam, L. J. Klein, Hua Qin, H. Luo, D. E. Savage, M. G. Lagally, A. J. Rimberg, Robert Joynt, Mark Friesen, R. Blick, S. N. Coppersmith, and M. A. Eriksson, Nat. Phys. 4, 540 (2008). [Journal Article | arXiv]

"Controllable valley splitting in silicon quantum devices." S. Goswami, K. A. Slinker, Mark Friesen, L. M. McGuire, J. L. Truitt, Charles Tahan, L. J. Klein, J. O. Chu, P. M. Mooney, Daniel W. van der Weide, Robert Joynt, S. N. Coppersmith, and M. A. Eriksson, Nat. Phys. 3, 41 (2007). [Journal Article | arXiv]

"Magnetic field dependence of valley splitting in realistic Si/SiGe quantum wells." Mark Friesen, M. A. Eriksson, and S. N. Coppersmith, Appl. Phys. Lett. 89, 202106 (2006). [Journal Article | arXiv]

"Spin-Based Quantum Dot Quantum Computing in Silicon." M. A. Eriksson, Mark Friesen, S. N. Coppersmith, Robert Joynt, L. J. Klein, K. A. Slinker, Charles Tahan, P. M. Mooney, J. O. Chu, and S. J. Koester, Quant. Inf. Proc. 3, 133 (2004). [Journal Article]

"Valley splitting in strained silicon quantum wells." Timothy B. Boykin, Gerhard Klimeck, M. A. Eriksson, Mark Friesen, S. N. Coppersmith, Paul von Allmen, Fabiano Oyafuso, and Seungwon Lee, Appl. Phys. Lett. 84, 115 (2004). [Journal Article]

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