Vibrationally induced two-level systems in single-molecule junctions

被引：82
|
作者：
Thijssen, W. H. A. [1 ]
Djukic, D. [1 ]
Otte, A. F. [1 ]
Bremmer, R. H. [1 ]
van Ruitenbeek, J. M. [1 ]
机构：
[1] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.97.226806
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Single-molecule junctions are found to show anomalous spikes in dI/dV spectra. The position in energy of the spikes is related to local vibration mode energies. A model of vibrationally induced two-level systems reproduces the data very well. This mechanism is expected to be quite general for single-molecule junctions. It acts as an intrinsic amplification mechanism for local vibration mode features and may be exploited as a new spectroscopic tool.
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页数：4
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