Periodic lattice distortion accompanying the charge-density-wave transition for Sn/Ge(111)

被引：45
|
作者：
Zhang, JD
Ismail
Rous, PJ
Baddorf, AP
Plummer, EW
机构：
[1] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA
[2] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[3] Univ Maryland, Dept Phys, Baltimore, MD 21228 USA
来源：
PHYSICAL REVIEW B | 1999年 / 60卷 / 04期
关键词：
D O I：
10.1103/PhysRevB.60.2860
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The periodic lattice distortion (PLD) accompanying the charge-density-wave (CDW) transition (at -60 degrees C) in the a phase of Sn on Ge(lll) has been determined by combining the distinct sensitivities of low-energy electron diffraction (LEED) and surface x-ray diffraction (SXRD). New LEED I-V data combined with a SXRD analysis yield a significant lattice distortion. The PLD accompanying the CDW transition is a 0.37-Angstrom vertical rippling of the Sn atoms accompanied by a perpendicular (0.17 Iq) and parallel (0.12 Angstrom) distortion of the first-layer Ge atoms, consistent with a band Jahn-Teller-like distortion. [S0163-1829(99)01128-5].
引用
收藏
页码：2860 / 2863
页数：4
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