The Nernst effect in Corbino geometry

Abstract

We study the manifestation of the Nernst effect in the Corbino disk subjected to the normal external magnetic field and to the radial temperature gradient. The Corbino geometry offers a precious opportunity for the direct measurement of the magnetization currents that are masked by kinetic contributions to the Nernst current in the conventional geometry. The magnetization currents, also referred to as the edge currents, are independent on the conductivity of the sample which is why they can be conveniently described within the thermodynamic approach. They can be related to the Landau thermodynamic potential for an infinite system. We demonstrate that the observable manifestation of this, purely thermodynamic, Nernst effect consists in the strong oscillations of the magnetic field measured in the center of the disk as a function of the external field. The oscillations depend on the temperature difference at the edges of the disk. Dirac fermions and 2D electrons with a parabolic spectrum are characterized by oscillations of different phase and frequency. We predict qualitatively different power dependencies of the magnitude of the Nernst signal on the chemical potential for normal and Dirac carriers.

References in corpus (18)

• Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene
• The thermopower and Nernst Effect in graphene in a magnetic field
• Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations
• Thermoelectric Response of an Interacting Two-Dimensional Electron Gas in Quantizing Magnetic Field
• Gaussian superconducting fluctuations, thermal transport, and the Nernst effect
• Energy Magnetization and Thermal Hall Effect
• Nernst effect in metals and superconductors: a review of concepts and experiments
• Observation of the Nernst signal generated by fluctuating Cooper pairs
• De Haas-van Alphen effect in two- and quasi two-dimensional metals and superconductors
• Giant Nernst Effect due to Fluctuating Cooper Pairs in Superconductors
• Strongly correlated two-dimensional plasma explored from entropy measurements
• The influence of the oscillations of the chemical potential on the de Haas - van Alphen effect in quasi-two-dimensional compounds
• Giant Nernst-Ettingshausen oscillations in Semiclassically strong magnetic fields
• Anomalous thermospin effect in the low-buckled Dirac materials
• Quantization of entropy in a quasi-two-dimensional electron gas
• Comment on "Giant Nernst Effect due to Fluctuating Cooper Pairs in Superconductors" by M.N. Serbyn, M.A. Skvortsov, A.A. Varlamov, and V. Galitski
• Entropy Signatures of Topological Phase Transitions
• de Haas-van Alphen effect versus Integer Quantum Hall effect

Cited by in corpus (6)

• Transport properties of strongly coupled electron-phonon liquids
• Quantum anomalous Hall edge channels survive up to the Curie temperature
• Genesis and fading away of persistent currents in a Corbino disk geometry
• Rectification of heat current in Corbino geometry
• Spin-caloric resistance of Dirac plasma in a graphene Corbino device
• Nernst and Ettingshausen effects in the Laughlin geometry