An Electrothermodynamic Analysis of the Field Evaporation in the Configuration of Scanning Tunneling Microscope

Chin. Phys. Lett.

1998, Vol. 15

Issue (8): 608-610 DOI:

Original Articles

An Electrothermodynamic Analysis of the Field Evaporation in the Configuration of Scanning Tunneling Microscope

LI Zhi-yang¹;LIU Wu¹;LI Xing-jiao²

¹Department of Physics, Huazhong Normal University, Wuhan 430079 ²Department of Solid State Electronics, Huazhong University of Science and Technology, Wuhan 430074

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LI Zhi-yang, LIU Wu, LI Xing-jiao 1998 Chin. Phys. Lett. 15 608-610

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Abstract This paper presents an electrothermodynamic(Born-Haber-type) analysis of field evaporation in the configuration of scanning tunneling microscope, in which the adatom is only partially ionized and evaporated to counter electrode. As a result a formula was derived, which employed a so-called effective binding energy A_eff. The calculated evaporation field for Au^-1, at a tip-sample distance of d = 7.23Å and an evaporation rate of 10¹¹s^-1, is 0.6 V/Å, which agrees well with Chang's experiment [Phys. Rev.Lett.72(1994) 574].

Keywords: 79.70.+q 61.16.Ch 61.16.Fk

Published: 01 August 1998

PACS:	79.70.+q	(Field emission, ionization, evaporation, and desorption)
	61.16.Ch
	61.16.Fk

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1998/V15/I8/0608

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