Subpicosecond interconversion of buckled and symmetric dimers on Si(100)

Paul C. Weakliem; Gregory W. Smith; Emily A. Carter

doi:10.1016/0039-6028(90)90112-L

Subpicosecond interconversion of buckled and symmetric dimers on Si(100)

Paul C. Weakliem, Gregory W. Smith, Emily A. Carter

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Finite temperature molecular dynamics simulations provide the first theoretical evidence for subpicosecond dynamical behavior on a defect-free Si(100) surface; the instantaneous distribution of buckled and symmetric dimers is found to be ∼ 2: 3; buckled dimers rapidly interconvert with symmetric dimers, with the buckling direction alternating along a row; only symmetric dimers are observed on a time average; and we find that collective motion of ≥ 5 Si layers is involved in the reconstruction. Thus, the observed surface structure should depend on experimental time scales.

Original language	English (US)
Pages (from-to)	L219-L223
Journal	Surface Science
Volume	232
Issue number	3
DOIs	https://doi.org/10.1016/0039-6028(90)90112-L
State	Published - Jun 2 1990
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(90)90112-L

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title = "Subpicosecond interconversion of buckled and symmetric dimers on Si(100)",

abstract = "Finite temperature molecular dynamics simulations provide the first theoretical evidence for subpicosecond dynamical behavior on a defect-free Si(100) surface; the instantaneous distribution of buckled and symmetric dimers is found to be ∼ 2: 3; buckled dimers rapidly interconvert with symmetric dimers, with the buckling direction alternating along a row; only symmetric dimers are observed on a time average; and we find that collective motion of ≥ 5 Si layers is involved in the reconstruction. Thus, the observed surface structure should depend on experimental time scales.",

author = "Weakliem, \{Paul C.\} and Smith, \{Gregory W.\} and Carter, \{Emily A.\}",

note = "Funding Information: We have benefitted from helpful discussions with F. Abraham, S. Williams, B. Garrison and U. Landman. We also thank S. Sibener for providing unpublished data. This work was supported by the Air Force Office of Scientific Research (AFOSR-89-0108), with initial funding from the UCLA Academic Senate. E.A.C. also acknowledges a NSF Presidential Young Investigator Award and a Dreyfus Foundation Distinguished New Faculty Award. Computations utilized an FPS Model 506, purchased through the Department of Defense University Research Instrumentation Program (N00014-89-J-1378). Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "1990",

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doi = "10.1016/0039-6028(90)90112-L",

language = "English (US)",

volume = "232",

pages = "L219--L223",

journal = "Surface Science",

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T1 - Subpicosecond interconversion of buckled and symmetric dimers on Si(100)

AU - Weakliem, Paul C.

AU - Smith, Gregory W.

AU - Carter, Emily A.

N1 - Funding Information: We have benefitted from helpful discussions with F. Abraham, S. Williams, B. Garrison and U. Landman. We also thank S. Sibener for providing unpublished data. This work was supported by the Air Force Office of Scientific Research (AFOSR-89-0108), with initial funding from the UCLA Academic Senate. E.A.C. also acknowledges a NSF Presidential Young Investigator Award and a Dreyfus Foundation Distinguished New Faculty Award. Computations utilized an FPS Model 506, purchased through the Department of Defense University Research Instrumentation Program (N00014-89-J-1378). Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1990/6/2

Y1 - 1990/6/2

N2 - Finite temperature molecular dynamics simulations provide the first theoretical evidence for subpicosecond dynamical behavior on a defect-free Si(100) surface; the instantaneous distribution of buckled and symmetric dimers is found to be ∼ 2: 3; buckled dimers rapidly interconvert with symmetric dimers, with the buckling direction alternating along a row; only symmetric dimers are observed on a time average; and we find that collective motion of ≥ 5 Si layers is involved in the reconstruction. Thus, the observed surface structure should depend on experimental time scales.

AB - Finite temperature molecular dynamics simulations provide the first theoretical evidence for subpicosecond dynamical behavior on a defect-free Si(100) surface; the instantaneous distribution of buckled and symmetric dimers is found to be ∼ 2: 3; buckled dimers rapidly interconvert with symmetric dimers, with the buckling direction alternating along a row; only symmetric dimers are observed on a time average; and we find that collective motion of ≥ 5 Si layers is involved in the reconstruction. Thus, the observed surface structure should depend on experimental time scales.

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U2 - 10.1016/0039-6028(90)90112-L

DO - 10.1016/0039-6028(90)90112-L

M3 - Article

AN - SCOPUS:0001421245

SN - 0039-6028

VL - 232

SP - L219-L223

JO - Surface Science

JF - Surface Science

IS - 3

ER -

Subpicosecond interconversion of buckled and symmetric dimers on Si(100)

Abstract

All Science Journal Classification (ASJC) codes

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