Zobrazeno 1 - 10
of 206
pro vyhledávání: '"Zarenia M"'
The possibility of an inhomogeneous charge density wave phase is investigated in a system of two coupled electron and hole monolayers separated by a hexagonal boron nitride insulating layer. The charge density wave state is induced through the assump
Externí odkaz:
http://arxiv.org/abs/1811.12268
Publikováno v:
Physical Review Letters (2018)
Coupled 2D sheets of electrons and holes are predicted to support novel quantum phases. Two experiments of Coulomb drag in electron-hole (e-h) double bilayer graphene (DBLG) have reported an unexplained and puzzling sign reversal of the drag signal.
Externí odkaz:
http://arxiv.org/abs/1806.10732
Publikováno v:
Phys. Rev. B 97, 195408 (2018)
The influence of a perpendicular magnetic field on the binding energy and structural properties of excitons, trions, and biexcitons in monolayers of semiconducting transition metal dichalcogenides (TMDs) is investigated. The stochastic variational me
Externí odkaz:
http://arxiv.org/abs/1805.02610
Excitonic superfluidity in double phosphorene monolayers is investigated using the BCS mean-field equations. Highly anisotropic superfluidity is predicted where we found that the maximum superfluid gap is in the BEC regime along the armchair directio
Externí odkaz:
http://arxiv.org/abs/1804.06889
Publikováno v:
Phys. Rev. B 97, 081109(R) (2018)
The dependence of the excitonic photoluminescence (PL) spectrum of monolayer transition metal dichalcogenides (TMDs) on the tilt angle of an applied magnetic field is studied. Starting from a four-band Hamiltonian we construct a theory which quantita
Externí odkaz:
http://arxiv.org/abs/1802.08003
Publikováno v:
Phys. Rev. B 97, 207403 (2018)
In a recent publication [Phys. Rev. B $\textbf{89}$, 155403 (2014)], the authors investigated the spectrum of a Coulomb impurity in graphene in the presence of magnetic and electric fields using the coupled series expansion approach. In the first par
Externí odkaz:
http://arxiv.org/abs/1801.10257
Bilayer graphene can exhibit deformations such that the two graphene sheets are locally detached from each other resulting in a structure consisting of domains with different inter-layer coupling. Here we investigate how the presence of these domains
Externí odkaz:
http://arxiv.org/abs/1710.03194
Publikováno v:
Phys. Rev. B 96, 035131 (2017)
The electronic and structural properties of excitons and trions in monolayer transition metal dichalcogenides are investigated using both a multiband and a single-band model. In the multiband model we construct the excitonic Hamiltonian in the produc
Externí odkaz:
http://arxiv.org/abs/1707.07509
Publikováno v:
Phys. Rev. B 95, 045409 (2017)
The magnetic-field dependence of the energy spectrum, wave function, binding energy and oscillator strength of exciton states confined in a circular graphene quantum dot (CGQD) are obtained within the configuration interaction (CI) method. We predict
Externí odkaz:
http://arxiv.org/abs/1612.08031
Publikováno v:
Phys. Rev. B 95, 115438 (2017)
We introduce a new approach for the correlation energy of one- and two-valley two-dimensional electron gas (2DEG) systems. Our approach is based on a random phase approximation at high densities and a classical approach at low densities, with interpo
Externí odkaz:
http://arxiv.org/abs/1611.03713