Influence of electric current on the Casimir forces between graphene sheets
1 Peter Grünberg Institut, Forschungszentrum - Jülich, D-52425, Germany, EU
2 Samara State Technical University - 443100 Samara, Russia
Received: 2 June 2013
Accepted: 8 July 2013
We investigate the dependence of the thermal Casimir force and the Casimir friction force between two graphene sheets on the drift velocity of the electrons in one graphene sheet. We show that the drift motion produces a measurable change of the thermal Casimir force due to the Doppler effect. The thermal Casimir force as well as the Casimir friction are strongly enhanced in the case of resonant photon tunneling when the energy of the emitted photon coincides with the energy of electron-hole pair excitations. In the case of resonant photon tunneling, even for temperatures above room temperature the Casimir friction is dominated by quantum friction due to quantum fluctuations. Quantum friction can be detected in frictional drag experiment between graphene sheets for high electric field.
PACS: 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 12.20.Ds – Specific calculations / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
© EPLA, 2013