Spin waves in doped graphene: A time-dependent spin density functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases

被引：2

作者：

Anderson, Matthew J. ^{[1
]}

Perez, Florent ^{[2
]}

Ullrich, Carsten A. ^{[1
]}

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[2] CNRS Univ Paris VI, Inst Nanosci Paris, F-75005 Paris, France

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 24期

关键词：

PLASMONS; SCATTERING; FIELD;

D O I：

10.1103/PhysRevB.104.245422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In spin-polarized itinerant electron systems, collective spin-wave modes arise from dynamical exchange and correlation (xc) effects. We consider here spin waves in doped paramagnetic graphene with adjustable Zeemantype band splitting. The spin waves are described using time-dependent spin density functional response theory, treating dynamical xc effects within the Slater and Singwi-Tosi-Land-Sjolander approximations. We obtain spinwave dispersions and spin stiffnesses as a function of doping and spin polarization, and we discuss the prospects for their experimental observation.

引用

页数：14

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