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11 papers · 1 filter
Local density of states and scanning tunneling currents in graphene
N. M. R. Peres, Ling Yang, Shan-Wen Tsai
We present exact analytical calculations of scanning tunneling currents in locally disordered graphene using a multimode description of the microscope tip. Analytical expressions f…
Theory of Scanning Tunneling Spectroscopy of Magnetic Adatoms in Graphene
Bruno Uchoa, Ling Yang, S. -W. Tsai +2
We examine theoretically the signatures of magnetic adatoms in graphene probed by scanning tunneling spectroscopy (STS). When the adatom hybridizes equally with the two graphene su…
Electronic properties of graphene and graphene nanoribbons with "pseudo-Rashba" spin-orbit coupling
Tobias Stauber, John Schliemann
We discuss the electronic properties of graphene and graphene nanoribbons including "pseudo-Rashba" spin-orbit coupling. After summarizing the bulk properties, we first analyze the…
Evolution of squeezed states under the Fock-Darwin Hamiltonian
Jaime E. Santos, Nuno M. Peres, Joao Lopes dos Santos
We develop a complete analytical description of the time evolution of squeezed states of a charged particle under the Fock-Darwin Hamiltonian and a time-dependent electric field. T…
Strained graphene: tight-binding and density functional calculations
R. M. Ribeiro, Vitor M. Pereira, N. M. R. Peres +2
We determine the band structure of graphene under strain using density functional calculations. The ab-initio band strucure is then used to extract the best fit to the tight-bindin…
Scanning Tunneling Microscopy currents on locally disordered graphene
N. M. R. Peres, Shan-Wen Tsai, J. E. Santos +1
We study the local density of states at and around a substituting impurity and use these results to compute current versus bias characteristic curves of Scanning Tunneling Microsco…