2004/08/18 by Srijit Goswami, Mark Friesen, Goswami, Srijit +19
Physics and Astronomy · #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.cond-mat/0408389
openalex publication_date 2004/08/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The lifting of the two-fold degeneracy of the conduction valleys in a strained silicon quantum well is critical for spin quantum computing. Here, we obtain an accurate measurement of the splitting of the valley states in the low-field region of interest, using the microwave spectroscopy technique of electron valley resonance (EVR). We compare our results with conventional methods, observing a linear magnetic field dependence of the valley splitting, and a strong low-field suppression, consistent with recent theory. The resonance linewidth shows a marked enhancement above T≃ 300 mK.