Spin-valley collective modes of the electron liquid in graphene

被引：15

作者：

Raines, Zachary M. ^{[1
]}

Fal'ko, Vladimir, I ^{[2
,3
,4
]}

Glazman, Leonid, I ^{[1
]}

机构：

[1] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[2] Univ Manchester, Natl Graphene Inst, Manchester M13 9PL, Lancs, England

[3] Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England

[4] Henry Royce Inst Adv Mat, Manchester M13 9PL, Lancs, England

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.103.075422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We develop the theory of collective modes supported by a Fermi liquid of electrons in pristine graphene. Under reasonable assumptions regarding the electron-electron interaction, all the modes but the plasmon are overdamped. In addition to the SU(2)-symmetric spin mode, these include also the valley imbalance modes obeying a U(1) symmetry, and a U(2)-symmetric valley spin imbalance mode. We derive the interactions and diffusion constants characterizing the overdamped modes. The corresponding relaxation rates set fundamental constraints on graphene valley- and spintronics applications.

引用

页数：17

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