Photoconductivity in Dirac materials

Journal Article · Sun Nov 15 00:00:00 EST 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4935644· OSTI ID:22492197

Shao, J. M.

Two-dimensional (2D) Dirac materials including graphene and the surface of a three-dimensional (3D) topological insulator, and 3D Dirac materials including 3D Dirac semimetal and Weyl semimetal have attracted great attention due to their linear Dirac nodes and exotic properties. Here, we use the Fermi’s golden rule and Boltzmann equation within the relaxation time approximation to study and compare the photoconductivity of Dirac materials under different far- or mid-infrared irradiation. Theoretical results show that the photoconductivity exhibits the anisotropic property under the polarized irradiation, but the anisotropic strength is different between 2D and 3D Dirac materials. The photoconductivity depends strongly on the relaxation time for different scattering mechanism, just like the dark conductivity.

• OSTI ID: 22492197
• Journal Information: AIP Advances, Vol. 5, Issue 11; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BOLTZMANN EQUATION
COMPARATIVE EVALUATIONS
GRAPHENE
IRRADIATION
PHOTOCONDUCTIVITY
RELAXATION TIME
SCATTERING
SEMIMETALS
SURFACES
THREE-DIMENSIONAL LATTICES
TWO-DIMENSIONAL SYSTEMS