Vibration of the dimer on Si(001) surface excited by STM current

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The vibration of the dimer excited by STM current on Si(001) surface is investigated. We describe this system by the Hamiltonian which has the electron-vibration coupling term as the key ingredient. In order to characterize the transition rates induced by STM current between vibrational states we have introduced the effective temperature of the vibration which differs from the temperature of the substrate. The behavior of the effective temperature depends on the substrate temperature and STM current in highly nonlinear manner and qualitatively changes around 50 K of the substrate temperature. At lower temperatures, the effective temperature strongly deviates from the substrate temperature and reaches a few hundred Kelvin for the typical values of STM current. At higher substrate temperatures, the effective temperature reduces to the substrate temperature. On the basis of these behaviors of the effective temperature, we solve the puzzle of the symmetric-asymmetric crossover in dimer images of STM observation in the ordered state of c(4 x 2).

Original languageEnglish
Pages (from-to)417-422
Number of pages6
Journaljournal of the physical society of japan
Volume73
Issue number2
DOIs
Publication statusPublished - Feb 1 2004

Fingerprint

dimers
vibration
temperature
ingredients
vibrational states
crossovers

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Vibration of the dimer on Si(001) surface excited by STM current. / Kawai, Hiroshi; Narikiyo, Osamu.

In: journal of the physical society of japan, Vol. 73, No. 2, 01.02.2004, p. 417-422.

Research output: Contribution to journalArticle

@article{1e46a8783ca04c839327d457d590c1ea,
title = "Vibration of the dimer on Si(001) surface excited by STM current",
abstract = "The vibration of the dimer excited by STM current on Si(001) surface is investigated. We describe this system by the Hamiltonian which has the electron-vibration coupling term as the key ingredient. In order to characterize the transition rates induced by STM current between vibrational states we have introduced the effective temperature of the vibration which differs from the temperature of the substrate. The behavior of the effective temperature depends on the substrate temperature and STM current in highly nonlinear manner and qualitatively changes around 50 K of the substrate temperature. At lower temperatures, the effective temperature strongly deviates from the substrate temperature and reaches a few hundred Kelvin for the typical values of STM current. At higher substrate temperatures, the effective temperature reduces to the substrate temperature. On the basis of these behaviors of the effective temperature, we solve the puzzle of the symmetric-asymmetric crossover in dimer images of STM observation in the ordered state of c(4 x 2).",
author = "Hiroshi Kawai and Osamu Narikiyo",
year = "2004",
month = "2",
day = "1",
doi = "10.1143/JPSJ.73.417",
language = "English",
volume = "73",
pages = "417--422",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "2",

}

TY - JOUR

T1 - Vibration of the dimer on Si(001) surface excited by STM current

AU - Kawai, Hiroshi

AU - Narikiyo, Osamu

PY - 2004/2/1

Y1 - 2004/2/1

N2 - The vibration of the dimer excited by STM current on Si(001) surface is investigated. We describe this system by the Hamiltonian which has the electron-vibration coupling term as the key ingredient. In order to characterize the transition rates induced by STM current between vibrational states we have introduced the effective temperature of the vibration which differs from the temperature of the substrate. The behavior of the effective temperature depends on the substrate temperature and STM current in highly nonlinear manner and qualitatively changes around 50 K of the substrate temperature. At lower temperatures, the effective temperature strongly deviates from the substrate temperature and reaches a few hundred Kelvin for the typical values of STM current. At higher substrate temperatures, the effective temperature reduces to the substrate temperature. On the basis of these behaviors of the effective temperature, we solve the puzzle of the symmetric-asymmetric crossover in dimer images of STM observation in the ordered state of c(4 x 2).

AB - The vibration of the dimer excited by STM current on Si(001) surface is investigated. We describe this system by the Hamiltonian which has the electron-vibration coupling term as the key ingredient. In order to characterize the transition rates induced by STM current between vibrational states we have introduced the effective temperature of the vibration which differs from the temperature of the substrate. The behavior of the effective temperature depends on the substrate temperature and STM current in highly nonlinear manner and qualitatively changes around 50 K of the substrate temperature. At lower temperatures, the effective temperature strongly deviates from the substrate temperature and reaches a few hundred Kelvin for the typical values of STM current. At higher substrate temperatures, the effective temperature reduces to the substrate temperature. On the basis of these behaviors of the effective temperature, we solve the puzzle of the symmetric-asymmetric crossover in dimer images of STM observation in the ordered state of c(4 x 2).

UR - http://www.scopus.com/inward/record.url?scp=21144435897&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=21144435897&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.73.417

DO - 10.1143/JPSJ.73.417

M3 - Article

VL - 73

SP - 417

EP - 422

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 2

ER -