Vibrationally induced flip motion of a hydroxyl dimer on Cu(110)

Autor:	Ootsuka, Yasuhiro, Frederiksen, Thomas, Ueba, Hiromu, Paulsson, Magnus
Rok vydání:	2011
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 84, 193403 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.84.193403
Popis:	Recent low-temperature scanning-tunneling microscopy experiments [T. Kumagai et al., Phys. Rev. B 79, 035423 (2009)] observed the vibrationally induced flip motion of a hydroxyl dimer (OD)2 on Cu(110). We propose a model to describe two-level fluctuations and current-voltage characteristics of nanoscale systems which undergo vibrationally induced switching. The parameters of the model are based on comprehensive density-functional calculations of the system's vibrational properties. For the dimer (OD)2 the calculated population of the high and low conductance states, the I-V, dI/dV, and d2I/dV2 curves are in good agreement with the experimental results and underlines the different roles played by the free and shared OD stretch modes of the dimer. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1111.2252 Zobrazit plný text záznamu View this record from Arxiv