title: Strain-induced suppression of weak localization in CVD-grown graphene.
abstract: We investigate the magnetic-field- and temperature-dependent transport properties of CVD-grown graphene transferred to a flexible substrate (Kapton) and subjected to externally applied strain. In zero magnetic field, a logarithmic temperature-dependent conductivity correction, resulting from strong electron-electron interaction, becomes weaker with the application of strains as large as 0.6% because of an increased rate of chiral-symmetry-breaking scattering. With the application of a perpendicular magnetic field, we also observe positive magnetoconductance at low temperature (T = 5 K) due to weak localization. This magnetoconductance is suppressed with increasing strain, concomitant with a rapid decrease of the intervalley scattering rate (τ(i)(-1)). Our results are in good agreement with theoretical expectations and are consistent with a strain-induced decoupling between graphene and its underlying Kapton substrate.
authors.affiliation: Department of Physics, University of Florida, Gainesville, FL 32611, USA.
authors.forename: Xiaochang
authors.initials: X
authors.lastname: Miao
authors.forename: Sefaattin
authors.initials: S
authors.lastname: Tongay
authors.forename: Arthur F
authors.initials: AF
authors.lastname: Hebard