Single atom diffusion of Pb on a Si(111)-7x7 surface

被引：2

作者：

Kuntová, Z ^{[1
]}

Jelínek, P ^{[1
]}

Cháb, V ^{[1
]}

Chvoj, Z ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic

来源：

SURFACE SCIENCE | 2004年 / 566卷

关键词：

surface diffusion; semiconducting surfaces; lead; Monte Carlo simulations; scanning tunneling microscopy;

D O I：

10.1016/j.susc.2004.05.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pb diffusion on the Si(111)-7 x 7 surface was studied with 16 different energy barriers. As a part of general problem of diffusion in the unit cell, some characteristics of diffusion (as frequency factor, effective energy barrier or differences in binding energy) was found analytically as a steady state solution of the master equation. The probability distribution of the occupation of particular sites was compared with the result of the Monte Carlo simulation and the STM experiment. Starting from the values obtained with the semi-empirical extended Huckel approximation, the diffusion barriers were adjusted to obtain a reasonable coherence with the experiment. The results of MC simulation and the analytical solution agree quite well and reproduce the dynamics of a Pb atom in the 7 x 7 unit cell. (C) 2004 Published by Elsevier B.V.

引用

页码：130 / 136

页数：7

共 9 条

[1] Single adatom adsorption and diffusion on Si(111)-(7x7) surfaces:: Scanning tunneling microscopy and first-principles calculations -: art. no. 235410 [J].

Custance, O ;

Brochard, S ;

Brihuega, I ;

Artacho, E ;

Soler, JM ;

Baró, AM ;

Gómez-Rodríguez, JM .

PHYSICAL REVIEW B, 2003, 67 (23)

[2] ADATOM VIBRATIONS ON SI(111) RECONSTRUCTED SURFACES [J].

DAUM, W ;

IBACH, H ;

MULLER, JE .

PHYSICAL REVIEW LETTERS, 1987, 59 (14) :1593-1596

[3] Real-time observation of the dynamics of single Pb atoms on Si(111)-(7x7) by scanning tunneling microscopy [J].

Gomezrodriguez, JM ;

Saenz, JJ ;

Baro, AM ;

Veuillen, JY ;

Cinti, RC .

PHYSICAL REVIEW LETTERS, 1996, 76 (05) :799-802

[4] Surface dynamics and scanning tunneling microscopy: Diffusion of Pb atoms on Si(111)-(7x7) [J].

GomezRodriguez, JM ;

Veuillen, JY ;

Cinti, RC .

SURFACE REVIEW AND LETTERS, 1997, 4 (02) :335-342

[5] Experimental and theoretical studies of single Pb atom dynamics in one Si(111)-(7 x 7) unit cell [J].

Jelínek, P ;

Ondrejcek, M ;

Slezák, J ;

Cháb, V .

SURFACE SCIENCE, 2003, 544 (2-3) :339-347

[6] ENERGY AND VIBRATIONAL-SPECTRUM OF THE SI(111) (7X7) SURFACE FROM EMPIRICAL POTENTIALS [J].

LI, XP ;

CHEN, G ;

ALLEN, PB ;

BROUGHTON, JQ .

PHYSICAL REVIEW B, 1988, 38 (05) :3331-3341

[7]

RUNNELS LK, 1972, PHASE TRANSITIONS CR, V2, P305

[8] Study of Pb diffusion on Si(111)-(7x7) with scanning tunneling microscopy: Low coverage [J].

Slezak, J ;

Chab, V ;

Chvoj, Z ;

Mutombo, P .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2000, 18 (03) :1151-1155

[9] Adsorption and diffusion mechanisms of Pb on Si(111)-(7x7) in the initial stages of Pb chemisorption [J].

Sonnet, P ;

Stauffer, L ;

Minot, C .

SURFACE SCIENCE, 1998, 407 (1-3) :121-132

← 1 →