arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1609.03582hep-thcond-mat.str-el
收藏

石墨烯中双电流Dirac流体的全息成像

Holography of the Dirac Fluid in Graphene with two currents

Yunseok Seo, Geunho Song, Philip Kim, Subir Sachdev, Sang-Jin Sin

摘要:

最近的实验发现了石墨烯强耦合性质的证据:在电荷中性点附近,Wiedemann-Franz定律被违反了20倍。我们用全息模型描述了这种强耦合等离子体,其中存在两个不同的守恒U(1)电流。我们发现,我们的分析结果的输运系数的两个电流模型有一个显着改善的匹配的密度依赖性的实验数据比只有一个电流的模型。输运系数中的加性结构起着重要的作用。我们还提出了这两个电流的起源。

英文摘要:

Recent experiments have uncovered evidence of the strongly coupled nature of the graphene: the Wiedemann-Franz law is violated by up to a factor of 20 near the charge neutral point. We describe this strongly-coupled plasma by a holographic model in which there are two distinct conserved U(1) currents. We find that our analytic results for the transport coefficients for two current model have a significantly improved match to the density dependence of the experimental data than the models with only one current. The additive structure in the transports coefficients plays an important role. We also suggest the origin of the two currents.

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。

↑