On the line widths of vibrational features in inelastic electron tunneling spectroscopy

Michael Galperin, Mark A Ratner, Abraham Nitzan

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

We address the line shape and line widths observed in recent inelastic electron tunneling spectroscopy (IETS) experiments. The nonequilibrium Green function (NEGF) formalism is used to analyze the effect of the electron-phonon interaction on the tunneling spectra. We find that IETS line shapes are sensitive to junction parameters, in particular the position of the bridge electronic resonance and the molecule-lead coupling that may be controlled experimentally. Intrinsic IETS line widths are found to be dominated by the coupling of molecular vibrations to electron-hole pairs excitations in the lead(s) to which the molecule is bonded chemically. While estimated widths are of similar order of magnitude as observed in the recent experiment of Wang et al. (Nano Lett. 2004, 4, 643), one cannot rule out inhomogeneous contribution to the line width in this monolayer experiment.

Original languageEnglish
Pages (from-to)1605-1611
Number of pages7
JournalNano Letters
Volume4
Issue number9
DOIs
Publication statusPublished - Sep 2004

Fingerprint

Electron tunneling
electron tunneling
Linewidth
Spectroscopy
spectroscopy
line shape
Lead
Molecular vibrations
Electron-phonon interactions
Molecules
Experiments
electron phonon interactions
Green's function
molecules
Monolayers
Green's functions
formalism
vibration
Electrons
electronics

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

On the line widths of vibrational features in inelastic electron tunneling spectroscopy. / Galperin, Michael; Ratner, Mark A; Nitzan, Abraham.

In: Nano Letters, Vol. 4, No. 9, 09.2004, p. 1605-1611.

Research output: Contribution to journalArticle

Galperin, Michael ; Ratner, Mark A ; Nitzan, Abraham. / On the line widths of vibrational features in inelastic electron tunneling spectroscopy. In: Nano Letters. 2004 ; Vol. 4, No. 9. pp. 1605-1611.
@article{c086291317df4a169bb115d4ec3a33bb,
title = "On the line widths of vibrational features in inelastic electron tunneling spectroscopy",
abstract = "We address the line shape and line widths observed in recent inelastic electron tunneling spectroscopy (IETS) experiments. The nonequilibrium Green function (NEGF) formalism is used to analyze the effect of the electron-phonon interaction on the tunneling spectra. We find that IETS line shapes are sensitive to junction parameters, in particular the position of the bridge electronic resonance and the molecule-lead coupling that may be controlled experimentally. Intrinsic IETS line widths are found to be dominated by the coupling of molecular vibrations to electron-hole pairs excitations in the lead(s) to which the molecule is bonded chemically. While estimated widths are of similar order of magnitude as observed in the recent experiment of Wang et al. (Nano Lett. 2004, 4, 643), one cannot rule out inhomogeneous contribution to the line width in this monolayer experiment.",
author = "Michael Galperin and Ratner, {Mark A} and Abraham Nitzan",
year = "2004",
month = "9",
doi = "10.1021/nl049319y",
language = "English",
volume = "4",
pages = "1605--1611",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "9",

}

TY - JOUR

T1 - On the line widths of vibrational features in inelastic electron tunneling spectroscopy

AU - Galperin, Michael

AU - Ratner, Mark A

AU - Nitzan, Abraham

PY - 2004/9

Y1 - 2004/9

N2 - We address the line shape and line widths observed in recent inelastic electron tunneling spectroscopy (IETS) experiments. The nonequilibrium Green function (NEGF) formalism is used to analyze the effect of the electron-phonon interaction on the tunneling spectra. We find that IETS line shapes are sensitive to junction parameters, in particular the position of the bridge electronic resonance and the molecule-lead coupling that may be controlled experimentally. Intrinsic IETS line widths are found to be dominated by the coupling of molecular vibrations to electron-hole pairs excitations in the lead(s) to which the molecule is bonded chemically. While estimated widths are of similar order of magnitude as observed in the recent experiment of Wang et al. (Nano Lett. 2004, 4, 643), one cannot rule out inhomogeneous contribution to the line width in this monolayer experiment.

AB - We address the line shape and line widths observed in recent inelastic electron tunneling spectroscopy (IETS) experiments. The nonequilibrium Green function (NEGF) formalism is used to analyze the effect of the electron-phonon interaction on the tunneling spectra. We find that IETS line shapes are sensitive to junction parameters, in particular the position of the bridge electronic resonance and the molecule-lead coupling that may be controlled experimentally. Intrinsic IETS line widths are found to be dominated by the coupling of molecular vibrations to electron-hole pairs excitations in the lead(s) to which the molecule is bonded chemically. While estimated widths are of similar order of magnitude as observed in the recent experiment of Wang et al. (Nano Lett. 2004, 4, 643), one cannot rule out inhomogeneous contribution to the line width in this monolayer experiment.

UR - http://www.scopus.com/inward/record.url?scp=4644293963&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4644293963&partnerID=8YFLogxK

U2 - 10.1021/nl049319y

DO - 10.1021/nl049319y

M3 - Article

AN - SCOPUS:4644293963

VL - 4

SP - 1605

EP - 1611

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 9

ER -