Dynamics of surface alloying: Determination of diffusion barriers from photoelectron spectra

被引：7

作者：

Patthey, F ^{[1
]}

Massobrio, C ^{[1
]}

Schneider, WD ^{[1
]}

机构：

[1] ECOLE POLYTECH FED LAUSANNE,INST PHYS EXPTL,CH-1015 LAUSANNE,SWITZERLAND

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.53.13146

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that photoemission observations of the time evolution of the Pd/Ag(100) valence spectrum for different temperatures allow the extraction of diffusion barriers in surface alloy formation. Adatom migration takes place in distant steps. The first is based on an exchange mechanism, which occurs at about T=135 K with an activation energy of E(dl)=0.43(5) eV, while migration from a surface layer to a subsurface layer is observed at T>360 K with an activation energy E(d2)=1.12(4) eV.

引用

页码：13146 / 13149

页数：4

共 32 条

[1] SURFACE STUDIES BY SCANNING TUNNELING MICROSCOPY [J].

BINNING, G ;

ROHRER, H ;

GERBER, C ;

WEIBEL, E .

PHYSICAL REVIEW LETTERS, 1982, 49 (01) :57-61

[2]

CHAMBLISS DD, 1992, SURF SCI, V264, pL181

[3] SELF-DIFFUSION ON THE RECONSTRUCTED AND NONRECONSTRUCTED IR(110) SURFACES [J].

CHEN, C ;

TSONG, TT .

PHYSICAL REVIEW LETTERS, 1991, 66 (12) :1610-1613

[4] SURFACE ALLOYING IN METAL-ON-METAL EPITAXIAL-GROWTH [J].

ENGDAHL, C ;

STOLTZE, P ;

JACOBSEN, KW ;

NORSKOV, JK ;

SKRIVER, HL ;

ALDEN, M .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 1994, 12 (04) :1787-1789

[5] DIFFUSION PATH FOR AN AL ADATOM ON AL(001) [J].

FEIBELMAN, PJ .

PHYSICAL REVIEW LETTERS, 1990, 65 (06) :729-732

[6] ORDERED SURFACE PHASES OF AU ON CU [J].

FOILES, SM .

SURFACE SCIENCE, 1987, 191 (03) :329-338

[7]

FOILES SM, 1986, PHYS REV B, V33, P4983

[8] MOLECULAR-DYNAMICS OBSERVATIONS OF INTERDIFFUSION AND STRANSKI-KRASTANOV GROWTH IN THE EARLY FILM DEPOSITION OF AU ON AG(110) [J].

HAFTEL, MI ;

ROSEN, M ;

FRANKLIN, T ;

HETTERMANN, M .

PHYSICAL REVIEW LETTERS, 1994, 72 (12) :1858-1861

[9] MOLECULAR-DYNAMICS DESCRIPTION OF EARLY FILM DEPOSITION OF AU ON AG(110) [J].

HAFTEL, MI ;

ROSEN, M .

PHYSICAL REVIEW B, 1995, 51 (07) :4426-4434

[10] TEMPERATURE-DEPENDENT SURFACE-MORPHOLOGY OF AU/CU(001) [J].

HANSEN, JC ;

BENSON, JA ;

CLENDENING, WD ;

MCELLISTREM, MT ;

TOBIN, JG .

PHYSICAL REVIEW B, 1987, 36 (11) :6186-6189

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