Current Delivered by an STM tip in Landauer-Büttiker formalism

  • Urbashi Satpathi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

When an STM tip is brought close to a nano sized sample then it can deliver (or draw) a current that is determined by the Landauer-Buttiker formalism in terms of the scattering matrix that gives partial local density of states. We show that, very paradoxically, the interference related term in this formula vanish in a quantum regime making semi-classical formula for injectance exact in some regime. We explicitly show how evanescent modes are responsible for this. This can have useful implications to experimentalists as semi-classical formulas are much simpler.

Original languageEnglish
Title of host publicationMechanical and Electrical Technology IV
Pages1630-1634
Number of pages5
DOIs
StatePublished - 26 Dec 2012
Externally publishedYes
Event4th International Conference on Mechanical and Electrical Technology, ICMET 2012 - Kuala Lumpur, Malaysia
Duration: 24 Jul 201226 Jul 2012

Publication series

NameApplied Mechanics and Materials
Volume229-231
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Conference

Conference4th International Conference on Mechanical and Electrical Technology, ICMET 2012
Country/TerritoryMalaysia
CityKuala Lumpur
Period24/07/1226/07/12

Keywords

  • Density of states
  • Disordered systems
  • Electronic transport

ASJC Scopus subject areas

  • General Engineering

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