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Title: Magnetic-field-driven surface electromagnetic states in the graphene-antiferromagnetic photonic crystal system

The surface electromagnetic states (SEMSs) on graphene, which has a linear carrier dispersion law and is placed in an antiferromagnetic photonic crystal, are theoretically studied in the terahertz frequency range. The unit cell of such a crystal consists of layers of a nonmagnetic insulator and a uniaxial antiferromagnet, the easy axis of which is parallel to the crystal layers. A dc magnetic field is parallel to the easy axis of the antiferromagnet. An expression that relates the SEMS frequencies to the structure parameters is obtained. The problem of SEMS excitation by an external TE-polarized electromagnetic wave is solved, and the dependences of the transmission coefficient on the dc magnetic field and the carrier concentration are constructed. These dependences are shown to differ substantially from the case of a conventional two-dimensional electron gas with a quadratic electron dispersion law. Thus, the positions of the transmission coefficient peaks related to resonance SEMS excitation can be used to determine the character of carrier dispersion law in a two-dimensional electron gas.
Authors:
; ; ;  [1]
  1. National Academy of Sciences of Ukraine, Usikov Institute of Radiophysics and Electronics (Ukraine)
Publication Date:
OSTI Identifier:
22472307
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 120; Journal Issue: 4; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROELECTRIC MATERIALS; ANTIFERROMAGNETISM; CHARGE CARRIERS; CONCENTRATION RATIO; CRYSTALS; ELECTROMAGNETIC RADIATION; ELECTRON GAS; ELECTRONS; EXCITATION; GRAPHENE; LAYERS; MAGNETIC FIELDS; RESONANCE; SCANNING ELECTRON MICROSCOPY; SURFACES; THZ RANGE; TWO-DIMENSIONAL SYSTEMS