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Valley interference effects on a donor electron close to a Si/SiO2 interface
M. J. Calderon, Belita Koiller, S. Das Sarma
We analyze the effects of valley interference on the quantum control and manipulation of an electron bound to a donor close to a Si/SiO2 interface as a function of the valley-orbit…
Wavefunction considerations for the central spin decoherence problem in a nuclear spin bath
W. M. Witzel, S. Das Sarma
Decoherence of a localized electron spin in a solid state material (the ``central spin'' problem) at low temperature is believed to be dominated by interactions with nuclear spins…
How to Enhance Dephasing Time in Superconducting Qubits
L. Cywinski, R. M. Lutchyn, C. P. Nave +1
We theoretically investigate the influence of designed pulse sequences in restoring quantum coherence lost due to background noise in superconducting qubits. We consider both 1/f n…
Acoustic phonon scattering limited carrier mobility in 2D extrinsic graphene
E. H. Hwang, S. Das Sarma
We theoretically calculate the phonon scattering limited electron mobility in extrinsic (i.e. gated or doped with a tunable and finite carrier density) 2D graphene layers as a func…
Boltzmann transport and residual conductivity in bilayer graphene
Shaffique Adam, S. Das Sarma
A Drude-Boltzmann theory is used to calculate the transport properties of bilayer graphene. We find that for typical carrier densities accessible in graphene experiments, the domin…
Transport and percolation in a low-density high-mobility two-dimensional hole system
M. J. Manfra, E. H. Hwang, S. Das Sarma +3
We present a study of the temperature and density dependence of the resistivity of an extremely high quality two-dimensional hole system grown on the (100) surface of GaAs. For hig…