Measurements of weak localization of graphene in inhomogeneous magnetic fields
Journal article, 2015
Weak localization in graphene is studied in inhomogeneous magnetic fields. To generate the inhomogeneous field, a thin film of type-II superconducting niobium is put in close proximity to graphene. A deviation from the ordinary quadratic weak localization behavior is observed at low fields. We attribute this to the inhomogeneous field caused by vortices in the superconductor. The deviation, which depends on the carrier concentration in graphene, can be tuned by the gate voltage. In addition, collective vortex motion, known as vortex avalanches, is observed through magnetoresistance measurements of graphene.
jetp letters
v50
im ak
p5749
magnetoresistance
films
1989
flux tubes
1994
p389
avalanches
physical review b
im ak
Physics
electrons
v49
Author
Niclas Lindvall
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
A. Shivayogimath
Danmarks Tekniske Universitet
Avgust Yurgens
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
JETP Letters
0021-3640 (ISSN) 1090-6487 (eISSN)
Vol. 102 6 367-371Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1134/s0021364015180083