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


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