Research on Cryogenic Vacuum Tunneling.

Abstract

The Scanning Tunneling Microscope has been designed and constructed to operate at low temperature. In liquid helium at 4 K we have mapped the spatial variation of the superconducting energy gap. It, also, has been used for the first time to record the vibrational spectra of a molecule adsorbed on graphite and to image the molecule itself. The STM has also been used to record the phonon spectra of the graphite substrate. This is a new tool for low temperature studies which enables us to study the spatial variations in structure and spectra. Keywords: Low temperature; Superconductor; Energy gap; Spatial variations; Vibrational spectra; Tunneling.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1987
Accession Number
ADA180341

Entities

People

  • Calvin Quate

Organizations

  • Stanford University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Classification
  • Contracts
  • Energy Gaps
  • Graphitic Materials
  • High Temperature
  • High Temperature Superconductors
  • Low Temperature
  • Materials
  • Microscopes
  • Microscopy
  • Military Research
  • Quantum Tunneling
  • Security
  • Spectra
  • Superconductors
  • Universities
  • Vibrational Spectra

Fields of Study

  • Physics

Readers

  • Image Processing and Computer Vision.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Thin Film Deposition Science.