• 文献标题:   SHIFT OF THE COLLECTIVE MODE OF POLARIZED GRAPHENE ON A SUBSTRATE USING SPIN-SENSITIVE RESPONSE THEORY
  • 文献类型:   Article
  • 作  者:   KREIL D, HASLHOFER M, BOHM HM
  • 作者关键词:   graphene, ssnom, collective mode, plasmom, reflectivity
  • 出版物名称:   LITHUANIAN JOURNAL OF PHYSICS
  • ISSN:   1648-8504
  • 通讯作者地址:   Johannes Kepler Univ Linz
  • 被引频次:   1
  • DOI:  
  • 出版年:   2019

▎ 摘  要

The growing precision of optical and scattering experiments necessitates a better understanding of the influence of damping onto the collective mode of sheet electrons. As spin-polarized systems are of particular interest for spintronic applications, we here report spin-sensitive linear response functions of graphene, which give access to charge-and spin-density related excitations. We further calculate the reflectivity of graphene on an SiO2 surface, a setup used in s-wave scanning near-field microscopy. Increasing the partial spin-polarization of the graphene charge carriers leads to a significant broadening and shift of the plasmon mode, due to single-particle interband transitions of the minority spin carriers. We also predict an antiresonance in the longitudinal magnetic response function, similar to that of semiconductor heterostructures.