TY - JOUR
T1 - The non-linear response of molecular junctions
T2 - The polaron model revisited
AU - Galperin, Michael
AU - Nitzan, Abraham
AU - Ratner, Mark A.
PY - 2008/9/17
Y1 - 2008/9/17
N2 - A polaron model proposed as a possible mechanism for non-linear conductance (Galperin et al 2005 Nano Lett. 5 125-30) is revisited with the focus on the differences between the weak and strong molecule-lead coupling cases. Within the one-molecule-level model we present an approximate expression for the electronic Green function corresponding to the inelastic transport case, which in the appropriate limits reduces to expressions presented previously for the isolated molecule and for a molecular junction coupled to a slow vibration (static limit). The relevance of considerations based on the isolated molecule limit to understanding properties of molecular junctions is discussed.
AB - A polaron model proposed as a possible mechanism for non-linear conductance (Galperin et al 2005 Nano Lett. 5 125-30) is revisited with the focus on the differences between the weak and strong molecule-lead coupling cases. Within the one-molecule-level model we present an approximate expression for the electronic Green function corresponding to the inelastic transport case, which in the appropriate limits reduces to expressions presented previously for the isolated molecule and for a molecular junction coupled to a slow vibration (static limit). The relevance of considerations based on the isolated molecule limit to understanding properties of molecular junctions is discussed.
UR - http://www.scopus.com/inward/record.url?scp=54749123176&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/20/37/374107
DO - 10.1088/0953-8984/20/37/374107
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AN - SCOPUS:54749123176
SN - 0953-8984
VL - 20
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 37
M1 - 374107
ER -