Abbreviated Journal Title
Phys. Rev. B
Keywords
CONDUCTANCE FLUCTUATIONS; DISORDERED-SYSTEMS; WEAK-LOCALIZATION; CARBON; NANOTUBES; 2 DIMENSIONS; SCATTERING; TRANSPORT; Physics, Condensed Matter
Abstract
The quantum corrections to the conductivity and thermopower in monolayer graphene are studied. We use the recursive Green's-function method to calculate numerically the conductivity and thermopower of graphene. We then analyze these weak-localization corrections by fitting with the analytical theory as a function of the impurity parameters and gate potential. As a result of the quantum corrections to the thermopower, we find large magnetothermopower, which is shown to provide a very sensitive measure of the size and strength of the impurities. We compare these analytical and numerical results with existing experimental measurements of magnetoconductance of single-layer graphene and find that the average size and strength of the impurities in these samples can thereby be determined. We suggest favorable parameter ranges for future measurements of the magnetothermopower.
Journal Title
Physical Review B
Volume
89
Issue/Number
7
Publication Date
1-1-2014
Document Type
Article
Language
English
First Page
21
WOS Identifier
ISSN
1098-0121
Recommended Citation
Jinz, Aleksander P.; Kettemann, Stefan; and Mucciolo, Eduardo R., "Quantum corrections to thermopower and conductivity in graphene" (2014). Faculty Bibliography 2010s. 5446.
https://stars.library.ucf.edu/facultybib2010/5446
Comments
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