Mott insulating ground state on a triangular surface lattice

被引：84
作者：
Weitering, HH
Shi, X
Johnson, PD
Chen, J
DiNardo, NJ
Kempa, K
机构：
[1] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831
[2] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973
[3] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104
[4] DREXEL UNIV,DEPT PHYS & ATMOSPHER SCI,PHILADELPHIA,PA 19104
[5] UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104
[6] BOSTON COLL,DEPT PHYS,CHESTNUT HILL,MA 02167
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.78.1331
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Momentum-resolved direct and inverse photoemission spectra of the K/Si(111)-(root 3 x root 3)R30 degrees-B interface reveals the presence of strongly localized surface states, The K overlayer remains nonmetallic up to the saturation coverage. This system most likely presents the first experimental realization of a frustrated spin 1/2 Heisenberg antiferromagnet on a two-dimensional triangular lattice.
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页码：1331 / 1334
页数：4
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