Zobrazeno 1 - 10
of 344
pro vyhledávání: '"Abergel D"'
Publikováno v:
Phys. Rev. B 98, 205415 (2018)
Hexagonal boron nitride is an ideal dielectric to form two-dimensional heterostructures due to the fact that it can be exfoliated to be just few atoms thick and its a very low density of defects. By placing graphene nanoribbons on high quality hexago
Externí odkaz:
http://arxiv.org/abs/1808.10039
Publikováno v:
Journal of Physics: Condensed Matter, 32, 405603 (2020)
We investigate the extent to which the class of Dirac materials in two-dimensions provides general statements about the behavior of both fermionic and bosonic Dirac quasiparticles in the interacting regime. For both quasiparticle types, we find commo
Externí odkaz:
http://arxiv.org/abs/1803.11480
Publikováno v:
Phys. Rev. X 9, 031025 (2019)
We study a tight-binding model on the honeycomb lattice of chiral $d$-wave superconductivity that breaks time-reversal symmetry. Due to its nontrivial sublattice structure, we show that it is possible to construct a gauge-invariant time-reversal-odd
Externí odkaz:
http://arxiv.org/abs/1802.02280
Autor:
Kantian, A., Abergel, D. S. L.
Publikováno v:
Phys. Rev. Lett. 119, 037601 (2017)
We theoretically predict that a true bilayer exciton condensate,characterised by off-diagonal long range order and global phase coherence, can be created in one-dimensional solid state electron systems. The mechanism by which this happens is to intro
Externí odkaz:
http://arxiv.org/abs/1609.09080
Autor:
Abergel, D. S. L.
Previously, graphene nanoribbons set in lateral heterostructures with hexagonal boron nitride were predicted to support topologically protected states at low energy. We investigate how robust the transport properties of these states are against latti
Externí odkaz:
http://arxiv.org/abs/1609.01608
Publikováno v:
Phys. Rev. B 95, 161403 (2017)
Topological states of matter are characterized by global topological invariants which change their value across a topological quantum phase transition. It is commonly assumed that the transition between topologically distinct noninteracting gapped ph
Externí odkaz:
http://arxiv.org/abs/1608.07819
Publikováno v:
Physical Review B 92, 115430 (2015)
We model optical absorption of monolayer and bilayer graphene on hexagonal boron nitride for the case of closely-aligned crystal lattices. We show that perturbations with different spatial symmetry can lead to similar absorption spectra. We suggest t
Externí odkaz:
http://arxiv.org/abs/1507.03813
Publikováno v:
Phys. Rev. B 91, 085418 (2015)
We calculate the energy spectrum of a Dirac double layer, where each layer has the Dirac electronic dispersion, in the presence of a tilted magnetic field and small interlayer tunneling. We show that the energy splitting between the Landau levels has
Externí odkaz:
http://arxiv.org/abs/1412.3052
Autor:
Hong, Jongbae, Abergel, D. S. L.
Publikováno v:
Scientific Reports 6, 31352 (2016)
A longstanding mystery in understanding cuprate superconductors is the inconsistency between the experimental data measured by scanning tunneling spectroscopy (STS) and angle-resolved photoemission spectroscopy (ARPES). In particular, the gap between
Externí odkaz:
http://arxiv.org/abs/1411.5532
Publikováno v:
J. Phys.: Condens. Matter 28 (2016) 365001 (6pp)
Despite the now vast body of two-dimensional materials under study, bilayer graphene remains unique in two ways: it hosts a simultaneously tunable band gap and electron density; and stems from simple fabrication methods. These two advantages undersco
Externí odkaz:
http://arxiv.org/abs/1410.6167