Measurements of weak localization of graphene in inhomogeneous magnetic fields
Measurements of weak localization of graphene in inhomogeneous magnetic fields
复制标题
非均匀磁场中石墨烯弱局域化的测量
DOI：
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复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A. Yurgens
中科院分区：
文献类型：
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作者：
N. Lindvall;A. Shivayogimath;A. Yurgens
研究了非均匀磁场中石墨烯的弱局域化。为了产生不均匀的磁场，将第二类超导Nb薄膜放在靠近石墨烯的位置。在低场下观察到了与通常的二次弱局域化行为的偏离。我们把这归因于超导体中涡旋引起的不均匀场。这种偏差取决于石墨烯中的载流子浓度，可以通过栅极电压来调节。此外，通过测量石墨烯的磁阻，可以观察到集体涡旋运动，即所谓的涡旋雪崩。
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.
影响因子：
3.7
作者：
Baker, A. M. R.;Alexander-Webber, J. A.;Nicholas, R. J.
通讯作者：
Nicholas, R. J.
影响因子：
8.6
作者：
Tikhonenko, F. V.;Horsell, D. W.;Savchenko, A. K.
通讯作者：
Savchenko, A. K.
影响因子：
8.6
作者：
Tikhonenko, F. V.;Kozikov, A. A.;Gorbachev, R. V.
通讯作者：
Gorbachev, R. V.