Band splitting for Si(557)-Au: Is it spin-charge separation?

被引：196
作者：
Losio, R
Altmann, KN
Kirakosian, A
Lin, JL
Petrovykh, DY
Himpsel, FJ
机构：
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[2] Univ Durham, Dept Phys, Durham DH1 3LE, England
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 20期
关键词：
D O I：
10.1103/PhysRevLett.86.4632
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
It has been proposed that the Si(557)-Au surface exhibits spin-charge separation in a one-dimensional electron liquid. Two narrowly spaced bands are found which exhibit a well-defined splitting at the Fermi level. That is incompatible with the assignment to a spinon-holon pair in a Luttinger liquid. instead, we propose that the two bands are associated with two nearly degenerate atomic chains, or a chain of step atoms with two broken bonds. Such an assignment explains why the surface is metallic despite an even number of electrons per unit cell.
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收藏
页码：4632 / 4635
页数：4
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