Dirac States of 2D Topological Insulators: Effect of Heterovalent Dopant-Content
Sign Up to like & getrecommendations! Published in 2019 at "Microscopy and Microanalysis"
DOI: 10.1017/s143192761900045x
Abstract: Abstract We have studied Bi2Se3 at its 2D-limit using scanning tunneling spectroscopy (STS). Bulk Bi2Se3 is a well-known topological insulator having gapless surface states. In the 2D limit, the interior of the material exhibits a… read more here.
Keywords: dopant content; microscopy; spectroscopy; dirac ... See more keywords
Imaging Bulk and Edge Transport near the Dirac Point in Graphene Moiré Superlattices.
Sign Up to like & getrecommendations! Published in 2018 at "Nano letters"
DOI: 10.1021/acs.nanolett.8b00228
Abstract: Van der Waals structures formed by aligning monolayer graphene with insulating layers of hexagonal boron nitride exhibit a moiré superlattice that is expected to break sublattice symmetry. Despite an energy gap of several tens of… read more here.
Keywords: graphene; imaging bulk; edge; moir ... See more keywords
Finite-size correction scheme for supercell calculations in Dirac-point two-dimensional materials
Sign Up to like & getrecommendations! Published in 2018 at "Scientific Reports"
DOI: 10.1038/s41598-018-27632-6
Abstract: Modern electronic structure calculations are predominantly implemented within the super cell representation in which unit cells are periodically arranged in space. Even in the case of non-crystalline materials, defect-embedded unit cells are commonly used to… read more here.
Keywords: finite size; unit; size correction; unit cells ... See more keywords
Controlling the Dirac point voltage of graphene by mechanically bending the ferroelectric gate of a graphene field effect transistor
Sign Up to like & getrecommendations! Published in 2019 at "Materials Horizons"
DOI: 10.1039/c8mh01499j
Abstract: The linear shift in VDirac of a flexible GFET, caused by the flexoelectric effect of a PLZT gate, makes it enormously useful for both tuning the graphene doping state and detecting bending curvature. read more here.
Keywords: graphene; voltage graphene; point voltage; dirac point ... See more keywords
Strong gate-tunability of flat bands in bilayer graphene due to moiré encapsulation between hBN monolayers.
Sign Up to like & getrecommendations! Published in 2022 at "Nanoscale"
DOI: 10.1039/d2nr07171a
Abstract: When using hexagonal boron-nitride (hBN) as a substrate for graphene, the resulting moiré pattern creates secondary Dirac points. By encapsulating a multilayer graphene within aligned hBN sheets the controlled moiré stacking may offer even richer… read more here.
Keywords: graphene; secondary dirac; bilayer graphene; hbn ... See more keywords
Two-dimensional antiferromagnetic Dirac fermions in monolayer TaCoTe2
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.205102
Abstract: Dirac point in two-dimensional (2D) materials has been a fascinating subject of research. Recently, it has been theoretically predicted that Dirac point may also be stabilized in 2D magnetic systems. However, it remains a challenge… read more here.
Keywords: dirac points; two dimensional; afm dirac; dirac point ... See more keywords
Band dispersion of graphene with structural defects
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.235116
Abstract: We study the band dispersion of graphene with randomly distributed structural defects using two complementary methods, exact diagonalization of the tight-binding Hamiltonian and implementing a self-consistent $T$ matrix approximation. We identify three distinct types of… read more here.
Keywords: structural defects; band dispersion; dispersion graphene; dirac point ... See more keywords