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Abstract: We consider the problem of screening of an electrically charged impurity in aclean graphene sheet. When electron-electron interactions are neglected, thescreening charge has a sign opposite to that of the impurity, and is localizednear the impurity. Interactions between electrons smear out the induced chargedensity to give a large-distance tail that follows approximately, but notexactly, an r^{-2} behavior and with a sign which is the same as that of theimpurity.



Autor: Rudro R. Biswas, Subir Sachdev, Dam T. Son

Fuente: https://arxiv.org/







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