Magnetic-field asymmetry of nonlinear thermoelectric and heat transport
نویسندگان
چکیده
منابع مشابه
Magnetic-field asymmetry of nonlinear mesoscopic transport.
We investigate departures of the Onsager relations in the nonlinear regime of electronic transport through mesoscopic systems. We show that the nonlinear current-voltage characteristic is not an even function of the magnetic field due only to the magnetic-field dependence of the screening potential within the conductor. We illustrate this result for two types of conductors: A quantum Hall bar w...
متن کاملMagnetic-field asymmetry of nonlinear transport in carbon nanotubes.
We demonstrate that nonlinear electrical transport through a two-terminal nanoscale sample is not symmetric in the magnetic field B. More specifically, we have measured the lowest order B-asymmetric terms in single-walled carbon nanotubes. Theoretically, these terms can be used to infer both the strength of electron-electron interactions and the handedness of the nanotube. Consistent with theor...
متن کاملScattering theory of nonlinear thermoelectric transport.
We investigate nonlinear transport properties of quantum conductors in response to both electrical and thermal driving forces. Within the scattering approach, we determine the nonequilibrium screening potential of a generic mesoscopic system and find that its response is dictated by particle and entropic injectivities which describe the charge and entropy transfer during transport. We illustrat...
متن کاملElectron heat transport measured in a stochastic magnetic field.
New profile measurements have allowed the electron thermal diffusivity profile to be estimated from power balance in the Madison Symmetric Torus where magnetic islands overlap and field lines are stochastic. The measurements show that (1) the electron energy transport is conductive not convective, (2) the measured thermal diffusivities are in good agreement with numerical simulations of stochas...
متن کاملThermoelectric, transport, and magnetic properties of the polaron semiconductor FexCr3ÀxSe4
The series of compounds FexCr32xSe4, with 0<x<3, has been prepared and various thermoelectric properties measured from 5 to 900 K. Unlike most thermoelectric materials that are band semiconductors with high carrier mobilities, FexCr32xSe4 are polaronic semiconductors with Hall mobility values, over 100 times smaller. Nevertheless, FexCr32xSe4 has a surprisingly high thermoelectric figure of mer...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Journal of Physics
سال: 2013
ISSN: 1367-2630
DOI: 10.1088/1367-2630/15/10/105012