Phonon-drag magnetoquantum oscillations in graphene

Abstract

A theory of low-temperature phonon-drag magnetothermopower $S_{xx}^g$ is presented in graphene in a quantizing magnetic field. $S_{xx}^g$ is found to exhibit quantum oscillations as a function of magnetic field $B$ and electron concentration $n_e$. Amplitude of the oscillations is found to increase (decrease) with increasing $B$ ($n_e$). The behavior of $S_{xx}^g$ is also investigated as a function of temperature. A large value of $S_{xx}^g$($\sim$ few hundreds of $\mu$V/K) is predicted. Numerical values of $S_{xx}^g$ are compared with the measured magnetothermopower $S_{xx}$ and the diffusion component $S_{xx}^d$ from the modified Girvin-Jonson theory.

8 pages, 4 figures. To appear in Journal of Physics: Condens. Matter

References in corpus (12)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Electronic transport in two dimensional graphene
• Quantum Hall Ferromagnetism in Graphene
• Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene
• Novel electric field effects on Landau levels in Graphene
• The thermopower and Nernst Effect in graphene in a magnetic field
• Temperature-dependent resistivity of suspended graphene
• Filling-Factor-Dependent Magnetophonon Resonance in Graphene
• Mechanism for current saturation and energy dissipation in graphene transistors
• Precision quantization of Hall resistance in transferred graphene
• Thermoelectric effect in high mobility single layer epitaxial graphene