Laser Pulse Desorption Under STM Tip-Cl Removal from Single Site on Si(100).

Abstract

The desorption of pairs of chlorine atoms influenced by the tip of a scanning tunneling microscope is achieved at preselected sites on the Cl-saturated Si(100)-(2x1) surface using nanosecond laser pulse irradiation of the tip within the tunneling range. Bright features observed for the empty state topographic images after a laser pulse sequence are interpreted to be due to bare Si-Si dimers formed by laser induced desorption of two Cl atoms underneath the tip. The Cl desorption mechanism involves the enhancement of the sample - tip interaction due to laser pulse induced tip heating and tip expansion.

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Document Details

Document Type
Technical Report
Publication Date
Oct 14, 1996
Accession Number
ADA317545

Entities

People

  • I. Lyubinetsky
  • J. T. Yates Jr.
  • Z. Dohnalek

Organizations

  • University of Pittsburgh

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Base Pressure
  • Chemistry
  • Chlorine
  • Desorption
  • Electric Fields
  • Electrostatic Fields
  • Heating
  • High Temperature
  • Laser Pulses
  • Lasers
  • Lithium Tantalates
  • Measurement
  • Military Research
  • Quantum Tunneling
  • Schematic Diagrams
  • Tunneling

Fields of Study

  • Physics

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Optical Physics and Photonics.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy