Temperature relaxation and energy loss of hot carriers in graphene
Temperature relaxation and energy loss of hot carriers in graphene
复制标题
石墨烯中热载流子的温度弛豫和能量损失
DOI：
10.1016/j.ssc.2010.07.016
复制
发表时间：
2010-10-01
影响因子：
2.1
通讯作者：
Tan, R. B.
中科院分区：
文献类型：
--
作者：
Dong, H. M.;Xu, W.;Tan, R. B.
The temperature relaxation and energy loss of hot Dirac fermions are investigated theoretically in graphene with carrier-optical phonon scattering. The time evolutions of temperature and energy loss for hot Dirac fermions in graphene are calculated self-consistently. It shows that the carrier-optical phonon coupling results in the energy relaxation of hot carriers excited by an electric field, and the relaxation time for temperature is about 0.5-1 ps and the corresponding energy loss is about 10-25 nW per carrier for typically doped graphene samples with a carrier density range of 1-5 x 10(12) cm(-2). Moreover, we analyze the dependence of temperature and energy relaxation on initial hot carrier temperature, lattice temperature and carrier density in detail. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
