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

Journal Article · Wed Apr 15 00:00:00 EDT 2015 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776115020016· OSTI ID:22472307

Tarapov, S. I.; Yakovenko, V. M.; Yampol’skii, V. A. ^[1]

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1. National Academy of Sciences of Ukraine, Usikov Institute of Radiophysics and Electronics (Ukraine)

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.

• OSTI ID: 22472307
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 120, Issue 4; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

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