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Theoretical model for Rashba spin-orbit interaction in d electrons
(Physical Review B: Condensed Matter and Materials Physics, 2014)
We show that the Rashba spin-orbit interaction in d electron solids, which originates from the broken inversion symmetry at surfaces or interfaces, is strongly dependent on the orbital characters of the bands involved. ...
Nonlinear localized flat-band modes with spin-orbit coupling
(Physical Review B: Condensed Matter and Materials Physics, 2016)
We report the coexistence and properties of stable compact localized states (CLSs) and discrete solitons (DSs) for nonlinear spinor waves on a flat-band network with spin-orbit coupling (SOC). The system can be implemented ...
Critical behavior of the van derWaals bonded ferromagnet Fe3-xGeTe2
(Physical Review B: Condensed Matter and Materials Physics, 2017)
The critical properties of the single-crystalline van der Waals bonded ferromagnet Fe3-xGeTe2 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic (FM) phase transition. The Fe3-xGeTe2 single ...
Ab initio study of the electron energy loss function in a graphene-sapphire-graphene composite system
(Physical Review B: Condensed Matter and Materials Physics, 2017)
The propagator of a dynamically screened Coulomb interaction W in a sandwichlike structure consisting of two graphene layers separated by a slab of Al2O3 (or vacuum) is derived from single-layer graphene response functions ...
Critical current density and vortex pinning in tetragonal FeS1-xSex (x=0,0.06)
(Physical Review B: Condensed Matter and Materials Physics, 2016)
We report critical current density (J(c)) in tetragonal FeS single crystals, similar to iron-based superconductors with much higher superconducting critical temperatures (T-c). The Jc is enhanced three times by 6% Se doping. ...
Adsorption sites of individual metal atoms on ultrathin MgO(100) films
(Physical Review B: Condensed Matter and Materials Physics, 2017)
We use Ca doping during growth of one-and two-monolayer-thick MgO films on Ag(100) to identify the adsorption sites of individual adatoms with scanning tunneling microscopy. For this we combine atomic resolution images of ...
Observation of Dirac-like band dispersion in LaAgSb2
(Physical Review B: Condensed Matter and Materials Physics, 2016)
We present a combined angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations study of the electronic structure of LaAgSb2 in the entire first Brillouin zone. We observe a Dirac-cone-like structure ...
Electronic structure and anisotropic Rashba spin-orbit coupling in monolayer black phosphorus
(Physical Review B: Condensed Matter and Materials Physics, 2015)
We investigate the electronic structure of the monolayer black phosphorus (BP) using density-functional methods both with and without an applied electric field. We find that a simple one-band tight-binding Hamiltonian based ...
Germanium doping of wider-band-gap CuGaSe2 chalcopyrites: Local and electronic structure
(Physical Review B: Condensed Matter and Materials Physics, 2010)
We present here a complementary study on germanium doping of the wider-band-gap CuGaSe2 (CGS) chalcopyrite. In photoluminescence studies, the occurrence of a new emission line was identified as Ge related and explained as ...
Dynamic polarization of graphene by moving external charges: Random phase approximation
(Physical Review B: Condensed Matter and Materials Physics, 2009)
We evaluate the stopping and image forces on a charged particle moving parallel to a doped sheet of graphene by using the dielectric-response formalism for graphenes pi-electron bands in the random phase approximation ...