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Loss of superfluidity by fermions in the boson Hubbard model on an optical lattice
Roman M. Lutchyn, Sumanta Tewari, S. Das Sarma
The experimentally observed loss of superfluidity by introducing fermions to the boson Hubbard system on an optical lattice is explained. We show that the virtual transitions of th…
Theory of charged impurity scattering in two dimensional graphene
S. Adam, E. H. Hwang, E. Rossi +1
We review the physics of charged impurities in the vicinity of graphene. The long-range nature of Coulomb impurities affects both the nature of the ground state density profile as…
Graphene magnetoresistance in a parallel magnetic field: Spin polarization effect
E. H. Hwang, S. Das Sarma
We develop a theory for graphene magnetotransport in the presence of carrier spin polarization as induced, for example, by the application of an in-plane magnetic field () paral…
Screening induced temperature dependent transport in 2D graphene
E. H. Hwang, S. Das Sarma
We calculate the temperature dependent conductivity of graphene in the presence of randomly distributed Coulomb impurity charges arising from the temperature dependent screening of…
The Observation of Percolation-Induced 2D Metal-Insulator Transition in a Si MOSFET
L. A. Tracy, E. H. Hwang, K. Eng +6
By analyzing the temperature () and density () dependence of the measured conductivity () of 2D electrons in the low density (cm) and temperature (0.02…
Crossover from quantum to Boltzmann transport in graphene
Shaffique Adam, Piet W. Brouwer, S. Das Sarma
We compare a fully quantum mechanical numerical calculation of the conductivity of graphene to the semiclassical Boltzmann theory. Considering a disorder potential that is smooth o…