Straintronics beyond homogeneous deformation

Gupta R, Rost F, Fleischmann M, Sharma S, Shallcross S (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 99

Journal Issue: 12

DOI: 10.1103/PhysRevB.99.125407

Abstract

We present a continuum theory of graphene, treating on an equal footing both the homogeneous Cauchy-Born (CB) deformation and the microscopic degrees of freedom associated with the two sublattices. While our theory recovers all extant results from homogeneous continuum theory, the Dirac-Weyl equation is found to be augmented by new pseudogauge and chiral fields fundamentally different from those that result from homogeneous deformation. We elucidate three striking electronic consequences: (i) non-CB deformations allow for the transport of valley-polarized charge over arbitrarily long distances, e.g., along a designed ridge; (ii) the triaxial deformations required to generate an approximately uniform magnetic field are unnecessary with non-CB deformation; and finally (iii) the vanishing of the effects of a one-dimensional corrugation seen in ab initio calculation upon lattice relaxation is explained as a compensation of CB and non-CB deformation.

Authors with CRIS profile

Involved external institutions

Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V. / Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy Germany (DE)

How to cite

APA:

Gupta, R., Rost, F., Fleischmann, M., Sharma, S., & Shallcross, S. (2019). Straintronics beyond homogeneous deformation. Physical Review B, 99(12). https://doi.org/10.1103/PhysRevB.99.125407

MLA:

Gupta, Reena, et al. "Straintronics beyond homogeneous deformation." Physical Review B 99.12 (2019).

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