Transition voltage spectroscopy in vacuum break junction: The standard tunneling barrier model and beyond
Transition voltage spectroscopy in vacuum break junction: The standard tunneling barrier model and beyond
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真空破坏结中的跃迁电压谱:标准隧道势垒模型及其他模型
DOI:
10.1002/pssb.201248034
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Köppel
中科院分区:
文献类型:
--
作者:
Bâldea;Köppel
Recent experiments on transition voltage (Vt) spectroscopy in mechanically controllable vacuum break junctions have been interpreted theoretically by using a Simmons WKB‐type approach of the transport by tunneling based on the standard vacuum barrier picture (work function + source‐drain bias + charge images). In the first part of the paper, we present an analysis demonstrating the inconsistencies of that approach. Then, we report detailed results obtained by exactly solving the Schrödinger equation, which show that the standard tunneling barrier model fails to describe the experimental vacuum transition voltage spectroscopy (TVS) data. This indicates that the physical description within that model is incomplete. In the attempt to go beyond the standard barrier model, we report results demonstrating that the inclusion of electron states at the electrodes' surface significantly improves the agreement with experiment. This applies both to thed‐dependence ofVtand to the jump in the linear conductance when approaching the atomic contact limit.
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DOI:
--
发表时间:
1988
期刊:
Physical Review B (Condensed Matter)
影响因子:
--
作者:
Lucas;Morawitz;Henry;Vigneron;Lambin;Cutler;Feuchtwang
通讯作者:
Feuchtwang
DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
J. Appelbaum;D. Hamann
通讯作者:
D. Hamann
影响因子:
3.7
作者:
Baldea, Ioan
通讯作者:
Baldea, Ioan
影响因子:
3.7
作者:
Becker, Michael;Berndt, Richard
通讯作者:
Berndt, Richard
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
H. Morawitz;I. P. Batra;R. Reinisch;G. Henry
通讯作者:
G. Henry