.png){kind=icon}
返回
Defect-blurred two-dimensional phase transition
.png){kind=icon}
PRE
AI
DOI：10.1016/S0079-6816(02)00008-4.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The role of defects in phase transitions is an important subject, especially in systems of low dimensionality. The two-dimensional system Sn/Ge(111)-(root3 x root3)R30degrees is an excellent example. The surface undergoes a gradual (root3- x root3) to (3 x 3) phase transition upon cooling, and much debate has arisen over the exact physical mechanism responsible for the transition. Concepts such as Fermi surface nesting, charge density waves, Jahn-Teller distortions, metal-insulator fluctuations, and soft phonons have been invoked to explain the experimental findings, and there is now a growing understanding that substitutional Ge defects play an important role. A brief historical overview is presented of the work done on the Sn/Ge(111) system and of the different reported explanations of the phase transition. An extensive discussion of the phase-transition mechanism, and of the role played by defects, is provided. It is argued that the transition should be classified as displacive-like rather than order-disorder-like, but that defects obscure a clear distinction. The definitive experiments to test this conclusion are suggested. (C) 2002 Elsevier Science Ltd. All rights reserved.
Keyword:
CHARGE-DENSITY-WAVE
SCANNING-TUNNELING-MICROSCOPY
PHOTOELECTRON DIFFRACTION
GE(111) SURFACES
SI(001) SURFACE
MOTT INSULATORS
LOW-TEMPERATURE
ALPHA-PHASE
SN/GE(111)
3X3
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
7.2
论文数:
769
被引数:
2.0K
机构
暂无机构信息
引用论文
分享收藏Reactive Extrusion and Magnesium (II) N-Heterocyclic Carbene Catalyst in Continuous PLA Production.png)
Polymers
OAAI
PolymersIF0
OAAI分享收藏Hyperpolarization by activation of halorhodopsin results in enhanced synaptic transmission: Neuromuscular junction and CNS circuitPLOS ONEOAAI
PLOS ONEIF0
OAAI分享收藏
查看更多内容