Publication Date:
2016-08-02
Description:
Author(s): M. E. Cifuentes-Quintal, O. de la Peña-Seaman, R. Heid, R. de Coss, and K.-P. Bohnen Strain engineering in graphene is of high current interest because of the possibility to induce new physical phenomena by means of mechanical strain. The authors of this work study the effect of strain on the electron-phonon interaction that plays an important role in the vibrational, thermal, and transport properties of graphene. It has been commonly assumed that Kohn anomalies and electron-phonon coupling in strained graphene occur only for the longitudinal and transverse optical phonons, as in pristine graphene. In contrast, this study shows that uniaxial strain in graphene induces a Kohn anomaly and enhancement of the electron-phonon coupling in the longitudinal acoustic phonon branch. This feature is a major difference between pristine and uniaxially strained graphene, due to the presence of a new intervalley phonon-scattering channel for electronic states close to the Dirac point. [Phys. Rev. B 94, 085401] Published Mon Aug 01, 2016
Keywords:
Surface physics, nanoscale physics, low-dimensional systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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