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Volumn 78, Issue 20, 2008, Pages

Electric field response of a vibrationally excited molecule in an STM junction

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Indexed keywords


EID: 57149123301     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.78.201405     Document Type: Article
Times cited : (33)

References (20)
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    • Moresco, F.1
  • 6
    • 57149147042 scopus 로고    scopus 로고
    • Typical conditions for obtaining STM images were Vsample =-20 mV and Itunnel =0.2 nA. The (CH3 S) 2 vapor was exposed to the clean Cu(111) surface at a temperature below 50 K. CH3 S molecules were produced by the S-S bond dissociation reaction of isolated (CH3 S) 2 molecules, induced by the injection of tunneling electrons from the STM tip. During the reaction and the manipulation, the substrate was kept at 4.7 K.
    • Typical conditions for obtaining STM images were Vsample =-20 mV and Itunnel =0.2 nA. The (CH3 S) 2 vapor was exposed to the clean Cu(111) surface at a temperature below 50 K. CH3 S molecules were produced by the S-S bond dissociation reaction of isolated (CH3 S) 2 molecules, induced by the injection of tunneling electrons from the STM tip. During the reaction and the manipulation, the substrate was kept at 4.7 K.
  • 9
  • 11
    • 57149124824 scopus 로고    scopus 로고
    • Based on this assumption, we estimate that " I " is 2 nA, when " d " is 8 Å (i.e., R is 0.1 GΩ), and a bias voltage (V) of -0.2 V is applied to an STM tip to induce the attractive hopping. Moreover, based on the tunneling current characteristic of STM, the value of " I " can be estimated as 0.2 nA, when d=9 Å and V=-0.2 V. Furthermore, " I " should be 0.02 nA, when d=10 Å and V=-0.2 V. Therefore, the tip-surface distance (dtip-surf) is given by " dtip-surf =8-log (I/2) =8+log2-logI " for attractive hopping.
    • Based on this assumption, we estimate that " I " is 2 nA, when " d " is 8 Å (i.e., R is 0.1 GΩ), and a bias voltage (V) of -0.2 V is applied to an STM tip to induce the attractive hopping. Moreover, based on the tunneling current characteristic of STM, the value of " I " can be estimated as 0.2 nA, when d=9 Å and V=-0.2 V. Furthermore, " I " should be 0.02 nA, when d=10 Å and V=-0.2 V. Therefore, the tip-surface distance (dtip-surf) is given by " dtip-surf =8-log (I/2) =8+log2-logI " for attractive hopping.
  • 16
    • 57149144581 scopus 로고    scopus 로고
    • The tip apex terminated by a single atom must be positioned within 0.2 nm of the center of the protrusion to precisely control the hopping direction of a molecule.
    • The tip apex terminated by a single atom must be positioned within 0.2 nm of the center of the protrusion to precisely control the hopping direction of a molecule.
  • 19
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    • 10.1126/science.261.5123.886
    • Y. W. Mo, Science 261, 886 (1993). 10.1126/science.261.5123.886
    • (1993) Science , vol.261 , pp. 886
    • Mo, Y.W.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.