• 文献标题:   Theoretical Analysis of a Dual-Probe Scanning Tunneling Microscope Setup on Graphene
  • 文献类型:   Article
  • 作  者:   SETTNES M, POWER SR, PETERSEN DH, JAUHO AP
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007 EI 1079-7114
  • 通讯作者地址:   Tech Univ Denmark
  • 被引频次:   19
  • DOI:   10.1103/PhysRevLett.112.096801
  • 出版年:   2014

▎ 摘  要

Experimental advances allow for the inclusion of multiple probes to measure the transport properties of a sample surface. We develop a theory of dual-probe scanning tunneling microscopy using a Green's function formalism, and apply it to graphene. Sampling the local conduction properties at finite length scales yields real space conductance maps which show anisotropy for pristine graphene systems and quantum interference effects in the presence of isolated impurities. Spectral signatures in the Fourier transforms of real space conductance maps include characteristics that can be related to different scattering processes. We compute the conductance maps of graphene systems with different edge geometries or height fluctuations to determine the effects of nonideal graphene samples on dual-probe measurements.