Electron energy and temperature relaxation in graphene on a piezoelectric substrate

被引：23

作者：

Zhang, S. H. ^{[1
,2
,3
]}

Xu, W. ^{[2
]}

Peeters, F. M. ^{[1
]}

Badalyan, S. M. ^{[1
,4
]}

机构：

[1] Univ Antwerp, Dept Phys, B-2020 Antwerp, Belgium

[2] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[3] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China

[4] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 19期

关键词：

QUANTIZING MAGNETIC-FIELD; ACOUSTIC PHONONS; GAS; SCATTERING; INTERFACE; TRANSPORT;

D O I：

10.1103/PhysRevB.89.195409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the energy and temperature relaxation of electrons in graphene on a piezoelectric substrate. Scattering from the combined potential of extrinsic piezoelectric surface acoustical (PA) phonons of the substrate and intrinsic deformation acoustical phonons of graphene is considered for a (non) degenerate gas of Dirac fermions. It is shown that in the regime of low energies or temperatures the PA phonons dominate the relaxation and change qualitatively its character. This prediction is relevant for quantum metrology and electronic applications using graphene devices and suggests an experimental setup for probing electron-phonon coupling in graphene.

引用

页数：6

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