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arXiv 1303.6264cond-mat.mes-hall
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电中性条件下石墨烯的巨磁阻力

Giant magneto-drag in graphene at charge neutrality

M. Titov, R. V. Gorbachev, B. N. Narozhny, T. Tudorovskiy, M. Schuett, P. M. Ostrovsky, I. V. Gornyi, A. D. Mirlin, M. I. Katsnelson, K. S. Novoselov, A. K. Geim, L. A. Ponomarenko

摘要:

我们报道了弱磁场中两个相邻石墨烯单层之间库仑阻力的实验数据和理论分析。在足够接近中性点时,每层中电子和空穴的共存导致拖曳电阻率的急剧增加。远离电荷中性,我们观察到非零霍尔阻力。所观察到的现象解释的去耦的电和准粒子电流是正交的电荷中性。磁阻力的符号取决于能量弛豫速率和样品的几何形状。

英文摘要:

We report experimental data and theoretical analysis of Coulomb drag between two closely positioned graphene monolayers in weak magnetic field. Close enough to the neutrality point, coexistence of electrons and holes in each layer leads to a dramatic increase of the drag resistivity. Away from charge neutrality, we observe non-zero Hall drag. The observed phenomena are explained by decoupling of electric and quasiparticle currents which are orthogonal at charge neutrality. The sign of magneto-drag depends on the energy relaxation rate and geometry of the sample.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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