TY - JOUR
T1 - Strain-induced suppression of weak localization in CVD-grown graphene
AU - Miao, Xiaochang
AU - Tongay, Sefaattin
AU - Hebard, Arthur F.
PY - 2012/11/28
Y1 - 2012/11/28
N2 - 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=5K) due to weak localization. This magnetoconductance is suppressed with increasing strain, concomitant with a rapid decrease of the intervalley scattering rate (). Our results are in good agreement with theoretical expectations and are consistent with a strain-induced decoupling between graphene and its underlying Kapton substrate.
AB - 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=5K) due to weak localization. This magnetoconductance is suppressed with increasing strain, concomitant with a rapid decrease of the intervalley scattering rate (). Our results are in good agreement with theoretical expectations and are consistent with a strain-induced decoupling between graphene and its underlying Kapton substrate.
UR - http://www.scopus.com/inward/record.url?scp=84868318668&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84868318668&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/24/47/475304
DO - 10.1088/0953-8984/24/47/475304
M3 - Article
C2 - 23123808
AN - SCOPUS:84868318668
SN - 0953-8984
VL - 24
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 47
M1 - 475304
ER -