Ultrafast kinetics in Pb/Si(111) from the collective spreading of the wetting layer

被引：35

作者：

Hupalo, M. ^{[1
]}

Tringides, M. C. ^{[1
]}

机构：

[1] Iowa State Univ, Ames Lab, USDOE, Dept Phys, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.75.235443

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Although quantum size effects in Pb/Si(111) control the selection of uniform island heights, the fast formation time (after deposition of few minutes at T similar to 180 K) has been puzzling so far. By studying the island growth in stepwise deposition experiments, we demonstrate the important role of the wetting layer in the kinetics. Pb is transferred to unstable islands, not by independent atom hops, but by the continuous spreading of the wetting layer from the surrounding area to the island top. As Pb is moved to the top in ring-like morphology the underlying 7x7 reconstruction in the surrounding area emerges gradually.

引用

页数：7

共 25 条

[1] Uniform, self-organized, seven-step height Pb/Si(111)-(7X7) islands at low temperatures [J].

Budde, K ;

Abram, E ;

Yeh, V ;

Tringides, MC .

PHYSICAL REVIEW B, 2000, 61 (16) :10602-10605

[2] Quantum size effect on the diffusion barriers and growth morphology of Pb/Si(111) [J].

Chan, T. -L. ;

Wang, C. Z. ;

Hupalo, M. ;

Tringides, M. C. ;

Ho, K. M. .

PHYSICAL REVIEW LETTERS, 2006, 96 (22)

[3] Self-organization of Pb thin films on Cu(111) induced by quantum size effects [J].

Dil, JH ;

Kim, JW ;

Gokhale, S ;

Tallarida, M ;

Horn, K .

PHYSICAL REVIEW B, 2004, 70 (04) :045405-1

[4]

FENG L, UNPUB

[5] The evolution of the structure of quantum size effect Pb nanocrystals on Si(111) 7 x 7 [J].

Feng, R ;

Conrad, EH ;

Kim, C ;

Miceli, R ;

Tringides, MC .

PHYSICA B-CONDENSED MATTER, 2005, 357 (1-2) :175-179

[6] GROWTH AND MORPHOLOGY OF PB ON SI(111) [J].

GANZ, E ;

HWANG, IS ;

XIONG, FL ;

THEISS, SK ;

GOLOVCHENKO, J .

SURFACE SCIENCE, 1991, 257 (1-3) :259-273

[7] Alternating layer and island growth of Pb on Si by spontaneous quantum phase separation [J].

Hong, HW ;

Wei, CM ;

Chou, MY ;

Wu, Z ;

Basile, L ;

Chen, H ;

Holt, M ;

Chiang, TC .

PHYSICAL REVIEW LETTERS, 2003, 90 (07) :4

[8] Uniform-height island growth of Pb on Si(111)-Pb(√3x√3) at low temperatures -: art. no. 155307 [J].

Hupalo, M ;

Yeh, V ;

Berbil-Bautista, L ;

Kremmer, S ;

Abram, E ;

Tringides, MC .

PHYSICAL REVIEW B, 2001, 64 (15)

[9] PHOTOEMISSION FROM ULTRATHIN METALLIC-FILMS - QUANTUM SIZE EFFECT, ELECTRON-SCATTERING, AND FILM STRUCTURE [J].

JALOCHOWSKI, M ;

KNOPPE, H ;

LILIENKAMP, G ;

BAUER, E .

PHYSICAL REVIEW B, 1992, 46 (08) :4693-4701

[10] Influence of quantum size effects on island coarsening [J].

Jeffrey, CA ;

Conrad, EH ;

Feng, R ;

Hupalo, M ;

Kim, C ;

Ryan, PJ ;

Miceli, PF ;

Tringides, MC .

PHYSICAL REVIEW LETTERS, 2006, 96 (10) :1-4

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