Ultrafast Atomic Diffusion Inducing a Reversible (2√3x2√3)R30° ⇆ (√3x√3)R30° Transition on Sn/Si(111) : B

被引：7

作者：

Srour, W. ^{[1
,2
]}

Trabada, Daniel G. ^{[3
,4
]}

Martinez, J. I. ^{[3
,4
]}

Flores, F. ^{[3
,4
]}

Ortega, J. ^{[3
,4
]}

Abuin, M. ^{[5
]}

Fagot-Revurat, Y. ^{[1
]}

Kierren, B. ^{[1
]}

Taleb-Ibrahimi, A. ^{[6
]}

Malterre, D. ^{[1
]}

Tejeda, A. ^{[2
,7
]}

机构：

[1] Univ Lorraine, CNRS, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France

[2] Synchrotron SOLEIL, Orme Merisiers, F-91192 Gif Sur Yvette, France

[3] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain

[4] Univ Autonoma Madrid, Condensed Matter Phys Ctr IFIMAC, E-28049 Madrid, Spain

[5] Univ Complutense Madrid, Dept Fis Mat, E-28040 Madrid, Spain

[6] Synchrotron SOLEIL, CNRS, UR1, F-91192 Gif Sur Yvette, France

[7] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 19期

关键词：

CHARGE-DENSITY-WAVE; PHASE-TRANSITION; SUPERCONDUCTIVITY; ORDER; METAL;

D O I：

10.1103/PhysRevLett.114.196101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dynamical phase transitions are a challenge to identify experimentally and describe theoretically. Here, we study a new reconstruction of Sn on silicon and observe a reversible transition where the surface unit cell divides its area by a factor of 4 at 250 degrees C. This phase transition is explained by the 24-fold degeneracy of the ground state and a novel diffusive mechanism, where four Sn atoms arranged in a snakelike cluster wiggle at the surface exploring collectively the different quantum mechanical ground states.

引用

页数：5

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