Abstract
We show that when the pseudomagnetic fields created by long-wavelength deformations are appropriately coupled with a scalar electric potential, a significant energy gap can emerge due to the formation of a Haldane state. Ramifications of this physical effect are examined through the study of various strain geometries commonly seen in experiments, such as strain superlattices and wrinkled suspended graphene. Of particular technological importance, we consider setups where this gap can be tunable through electrostatic gates, allowing for the design of electronic devices not realizable with other materials.
- Received 12 April 2011
DOI:https://doi.org/10.1103/PhysRevB.83.195436
©2011 American Physical Society
Synopsis
Tunable gaps in strained graphene
Published 26 May 2011
A combination of strain and scalar potentials opens a gap in graphene.
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