Studies of step stiffnesses and relaxation on Pt(1 1 1), Pd(1 1 1) and Mo(0 1 1)

M. Ondrejcek; W. Swiech; C. P. Flynn

doi:10.1016/j.susc.2004.05.038

Studies of step stiffnesses and relaxation on Pt(1 1 1), Pd(1 1 1) and Mo(0 1 1)

M. Ondrejcek, W. Swiech, C. P. Flynn

National Center for Supercomputing Applications (NCSA)

Research output: Contribution to journal › Conference article › peer-review

Abstract

We describe investigations of equilibrium step structure on Pt(111), Pd(111) and Mo(011), using low energy electron microscopy. From capillary wave analyses we obtained fluctuation amplitudes and relaxation times for Fourier components of the step edge displacement as functions of wave number q. The τ_q^-1 at ~T_m/2 vary quite accurately with wavevector q as q³ and show that surface diffusion is responsible for the relaxation at these lower temperatures for all clean single crystal surfaces studied. The temperature dependence of the step stiffnesses is very weak in the intervals 1190-1520 K for Pt, 990-1300 K for Pd and 1350-1680 K for Mo.

Original language	English (US)
Pages (from-to)	160-164
Number of pages	5
Journal	Surface Science
Volume	566-568
Issue number	1-3 PART 1
DOIs	https://doi.org/10.1016/j.susc.2004.05.038
State	Published - Sep 20 2004
Event	Proceedings of the 22nd European Conference on Surface Science - Prague, Czech Republic Duration: Sep 7 2003 → Sep 12 2003

Keywords

Low-energy electron microscopy (LEEM)
Molybdenum
Palladium
Platinum
Surface diffusion

ASJC Scopus subject areas

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

Online availability

10.1016/j.susc.2004.05.038

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title = "Studies of step stiffnesses and relaxation on Pt(1 1 1), Pd(1 1 1) and Mo(0 1 1)",

abstract = "We describe investigations of equilibrium step structure on Pt(111), Pd(111) and Mo(011), using low energy electron microscopy. From capillary wave analyses we obtained fluctuation amplitudes and relaxation times for Fourier components of the step edge displacement as functions of wave number q. The τq-1 at ~Tm/2 vary quite accurately with wavevector q as q3 and show that surface diffusion is responsible for the relaxation at these lower temperatures for all clean single crystal surfaces studied. The temperature dependence of the step stiffnesses is very weak in the intervals 1190-1520 K for Pt, 990-1300 K for Pd and 1350-1680 K for Mo.",

keywords = "Low-energy electron microscopy (LEEM), Molybdenum, Palladium, Platinum, Surface diffusion",

author = "M. Ondrejcek and W. Swiech and Flynn, {C. P.}",

note = "Funding Information: Research was carried out in the Center for Microanalysis of Materials, University of Illinois, which is partially supported by the US Department of Energy under grant DEFG02-91-ER45439.; Proceedings of the 22nd European Conference on Surface Science ; Conference date: 07-09-2003 Through 12-09-2003",

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doi = "10.1016/j.susc.2004.05.038",

language = "English (US)",

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number = "1-3 PART 1",

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TY - JOUR

T1 - Studies of step stiffnesses and relaxation on Pt(1 1 1), Pd(1 1 1) and Mo(0 1 1)

AU - Ondrejcek, M.

AU - Swiech, W.

AU - Flynn, C. P.

N1 - Funding Information: Research was carried out in the Center for Microanalysis of Materials, University of Illinois, which is partially supported by the US Department of Energy under grant DEFG02-91-ER45439.

PY - 2004/9/20

Y1 - 2004/9/20

N2 - We describe investigations of equilibrium step structure on Pt(111), Pd(111) and Mo(011), using low energy electron microscopy. From capillary wave analyses we obtained fluctuation amplitudes and relaxation times for Fourier components of the step edge displacement as functions of wave number q. The τq-1 at ~Tm/2 vary quite accurately with wavevector q as q3 and show that surface diffusion is responsible for the relaxation at these lower temperatures for all clean single crystal surfaces studied. The temperature dependence of the step stiffnesses is very weak in the intervals 1190-1520 K for Pt, 990-1300 K for Pd and 1350-1680 K for Mo.

AB - We describe investigations of equilibrium step structure on Pt(111), Pd(111) and Mo(011), using low energy electron microscopy. From capillary wave analyses we obtained fluctuation amplitudes and relaxation times for Fourier components of the step edge displacement as functions of wave number q. The τq-1 at ~Tm/2 vary quite accurately with wavevector q as q3 and show that surface diffusion is responsible for the relaxation at these lower temperatures for all clean single crystal surfaces studied. The temperature dependence of the step stiffnesses is very weak in the intervals 1190-1520 K for Pt, 990-1300 K for Pd and 1350-1680 K for Mo.

KW - Low-energy electron microscopy (LEEM)

KW - Molybdenum

KW - Palladium

KW - Platinum

KW - Surface diffusion

UR - http://www.scopus.com/inward/record.url?scp=4544367197&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4544367197&partnerID=8YFLogxK

U2 - 10.1016/j.susc.2004.05.038

DO - 10.1016/j.susc.2004.05.038

M3 - Conference article

AN - SCOPUS:4544367197

SN - 0039-6028

VL - 566-568

SP - 160

EP - 164

JO - Surface Science

JF - Surface Science

IS - 1-3 PART 1

T2 - Proceedings of the 22nd European Conference on Surface Science

Y2 - 7 September 2003 through 12 September 2003

ER -

Studies of step stiffnesses and relaxation on Pt(1 1 1), Pd(1 1 1) and Mo(0 1 1)

Abstract

Keywords

ASJC Scopus subject areas

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