Nonlinear Dependences in Pulse-Pair-Excited Scanning Tunneling Microscopy

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概要

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• The mechanism underlying an ultrafast decay of a sample parameter appears that in a time-resolved tunnel current signal obtained by pulse-pair-excited scanning tunneling microscopy (PPX-STM) was theoretically and experimentally investigated. It was shown that the nonlinear dependence of the tunnel current on the sample parameter allows us to observe the decay process in a PPX-STM experiment even when the sample parameter itself does not have a nonlinear response to the light intensity. This result promises the applicability of PPX-STM measurement to a wide variety of samples. On the other hand, such a nonlinear dependence makes the analysis of the obtained data very difficult. Since the apparent decay time in the signal can be different from the actual value, the analysis must be carried out with detailed knowledge of dependence of the tunnel current on the sample parameter.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2006-03-30

著者

• Takeuchi Osamu

  Institute Of Applied Physics And 21st Coe University Of Tsukuba

• Shigekawa Hidemi

  Institute Of Applied Physics And 21st Coe University Of Tsukuba

• AOYAMA Masahiro

  Institute of Applied Physics, 21st Century COE, CREST JST, University of Tsukuba

• Taninaka Atsushi

  Institute Of Applied Physics Crest-jst University Of Tsukuba

• Terada Yasuhiko

  Institute Of Applied Physics University Of Tsukuba

• Kondo Hiroyuki

  Institute of Applied Physics, 21st Century COE, CREST-JST, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

• Terada Yasuhiko

  Institute of Applied Physics, 21st Century COE, CREST-JST, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

• Taninaka Atsushi

  Institute of Applied Physics, 21st Century COE, CREST-JST, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

• Aoyama Masahiro

  Institute of Applied Physics, 21st Century COE, CREST-JST, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan

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