Low Temperature Physics: 43, 865 (2017); https://doi.org/10.1063/1.4995639
Физика Низких Температур: Том 43, Выпуск 7 (Июль 2017), c. 1080-1093    ( к оглавлению , назад )

Single-particle emission at finite temperatures

Michael Moskalets

Department of Metal and Semiconductor Physics, NTU “Kharkiv Polytechnic Institute”, 61002 Kharkiv, Ukraine
E-mail: michael.moskalets@gmail.com

Received February 17, 2017

Аннотация

The state of particles injected onto the surface of the Fermi sea depends essentially on the temperature. The pure state injected at zero temperature becomes a mixed state if injected at finite temperature. Moreover the electron source injecting a single-particle state at zero temperature may excite a multi-particle state if the Fermi sea is at finite temperature. Here I unveil a symmetry of the scattering amplitude of a source, which is sufficient to preserve a single-particle emission regime at finite temperatures if such a regime is achieved at zero temperature. I give an example and analyze the effect of temperature on time-dependent electrical and heat currents carried by a single-particle excitation.

PACS: 73.22.Dj Single particle states;
PACS: 73.23.–b Electronic transport in mesoscopic systems;
PACS: 73.63.–b Electronic transport in nanoscale materials and structures.

Ключевые слова: single-electron state, quantum transport, time-dependent heat current, Floquet scattering matrix.

Published online: May 25, 2017