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.
Physics
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p389
v49
electrons
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physical review b
im ak
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jetp letters
magnetoresistance
flux tubes
avalanches
v50
p5749
Author
Niclas Lindvall
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
A. Shivayogimath
Technical University of Denmark (DTU)
Avgust Yurgens
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
JETP Letters
0021-3640 (ISSN) 1090-6487 (eISSN)
Vol. 102 6 367-371Subject Categories
Physical Sciences
DOI
10.1134/s0021364015180083