Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Tabert, Calvin"'
Autor:
Tabert, Calvin J., Carbotte, J. P.
Publikováno v:
Phys. Rev. B 92, 245414 (2015)
The Dirac fermions at the surface of a topological insulator can be gapped by introducing magnetic dopants. Alternatively, in an ultra-thin slab with thickness on the order of the extent of the surface states, both the top and bottom surface states a
Externí odkaz:
http://arxiv.org/abs/1512.04802
Autor:
Tabert, Calvin J., Carbotte, J. P.
Publikováno v:
2D Materials 2 (2015) 034020
The low-energy Hamiltonian used to describe the dynamics of the helical Dirac fermions on the surface of a topological insulator contains a subdominant non-relativistic (Schr\"odinger) contribution. This term can have an important effect on some prop
Externí odkaz:
http://arxiv.org/abs/1509.07782
Autor:
Tabert, Calvin J., Carbotte, J. P.
Publikováno v:
Phys. Rev. B 91, 235405 (2015)
We consider the combined effect of a gap and a Zeeman interaction on the helical Dirac fermions which exist on the surface of a topological insulator. Magneto-optical properties, the magnetization, Hall effect and the density of states are considered
Externí odkaz:
http://arxiv.org/abs/1505.06660
Publikováno v:
Phys. Rev. B 91, 035423 (2015)
We calculate the magnetic response of a buckled honeycomb lattice with intrinsic spin-orbit coupling (such as silicene) which supports valley-spin polarized energy bands when subjected to a perpendicular electric field $E_z$. By changing the magnitud
Externí odkaz:
http://arxiv.org/abs/1412.1113
Autor:
Tabert, Calvin J., Carbotte, J. P.
Publikováno v:
J. Phys.: Condens. Matter 27, 015008 (2015)
We calculate the magnetization of the helical metallic surface states of a topological insulator. We account for the presence of a small sub-dominant Schr{\"o}dinger piece in the Hamiltonian in addition to the dominant Dirac contribution. This breaks
Externí odkaz:
http://arxiv.org/abs/1411.5973
Autor:
Tabert, Calvin J., Nicol, Elisabeth J.
Publikováno v:
Phys. Rev. B 89, 195410 (2014)
We explore the dielectric properties of graphene-like two-dimensional Kane-Mele topological insulators manifest in buckled honeycomb lattices (ex. silicene, germanene, etc.). The effect of an onsite potential difference ($\Delta_z$) between sublattic
Externí odkaz:
http://arxiv.org/abs/1403.4618
Autor:
Tabert, Calvin J., Nicol, Elisabeth J.
Publikováno v:
Phys. Rev. B 88, 085434 (2013)
The magneto-optical longitudinal, transverse Hall and circularly-polarized response of silicene and other materials described by a Kane-Mele Hamiltonian are calculated. Particular attention is paid to the effects of an external electric field and fin
Externí odkaz:
http://arxiv.org/abs/1306.5249
Autor:
Tabert, Calvin J., Nicol, Elisabeth J.
Publikováno v:
Phys. Rev. B 87, 235426 (2013)
The intrinsic spin and valley Hall conductivities of silicene, germanene and other similar two dimensional crystals are explored theoretically. Particular attention is given to the effects of the intrinsic spin-orbit coupling, electron doping and the
Externí odkaz:
http://arxiv.org/abs/1306.4591
Autor:
Tabert, Calvin J., Nicol, Elisabeth J.
Publikováno v:
Phys. Rev. Lett. 110, 197402 (2013)
We calculate the magneto-optical conductivity and electronic density of states for silicene, the silicon equivalent of graphene, and similar crystals such as germanene. In the presence of a perpendicular magnetic field and electric field gating, we n
Externí odkaz:
http://arxiv.org/abs/1303.3316
Autor:
Tabert, Calvin J., Nicol, Elisabeth J.
Publikováno v:
Phys. Rev. B 87, 121402(R) (2013)
We calculate the finite-frequency conductivity of bilayer graphene with a relative twist between the layers. The low frequency response at zero doping shows a flat conductivity with value twice that of the monolayer case and at higher frequency a str
Externí odkaz:
http://arxiv.org/abs/1302.7233