Interpretation of Transition Voltage Spectroscopy

• Published in: Nano letters Vol. 9; no. 11; pp. 3909 - 3913
• Main Authors: Huisman, Everardus H, Guédon, Constant M, van Wees, Bart J, van der Molen, Sense Jan
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01-11-2009
• Subjects: Applied sciences; Electronics; Exact sciences and technology; Molecular electronics, nanoelectronics; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Molecular position; Molecular electronics; Experimental data; Experimental design; Molecular model; Tunnel junction; Molecular junction
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl9021094

The promise of transition voltage spectroscopy (TVS) is that molecular level positions can be determined in molecular devices without applying extreme voltages. Here, we consider the physics behind TVS in more detail. Remarkably, we find that the Simmons model employed thus far is inconsistent with experimental data. However, a coherent molecular transport model does justify TVS as a spectroscopic tool. Moreover, TVS may become a critical test to distinguish molecular junctions from vacuum tunnel junctions.