Structural and Functional Analysis of mRNA Export Regulation by the Nuclear Pore Complex
Explore the source record for details and available documents.
99 GENERAL AND MISCELLANEOUS↗
Engineering topics
Cai, S.
Publications and source records attributed to Cai, S..
Probing Interactions in Low-Dimensional Systems: Exciton Condensation in SiGe Bilayers.
Abstract not provided.
Chen, Damon↗
Density dependence of the excitation gaps in an undoped Si/SiGe double-quantum-well heterostructure
In this work, we report low-temperature magneto-transport measurements of an undoped Si/SiGe asymmetric double quantum well heterostructure. The density in both layers is tuned independently utilizing top and bottom gates, allowing the investigation of quantum wells at both imbalanced and matched densities. Integer quantum Hall states at total filling factor v T =1 and v T =2 are observed in both density regimes, and the evolution of their excitation gaps is reported as a function of the density. The v T =1 gap evolution departs from the behavior generally observed for valley splitting in the single layer regime. Furthermore, by comparing the v T =2 gap to the single particle tunneling energy, Δ SAS , obtained from Schrödinger–Poisson (SP) simulations, evidence for the onset of spontaneous interlayer coherence is observed for a relative filling fraction imbalance smaller than ~50%.
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗