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Mott Insulating Ground State on a Triangular Surface Lattice
Journal article   Peer reviewed

Mott Insulating Ground State on a Triangular Surface Lattice

X Shi, H Weitering, P Johnson, J Chen, N DiNardo and K Kempa
Physical Review Letters, v 78(7), pp 1331-1334
01 Feb 1997

Abstract

FRANCK-CONDON PRINCIPLE GROUND STATES LAYERS PHOTOEMISSION POTASSIUM SILICON Interfaces Physics Synchrotron Radiation
Momentum-resolved direct and inverse photoemission spectra of the K/Si(111)-({radical}(3){times}{radical}(3))R30{degree}-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. {copyright} {ital 1997} {ital The American Physical Society}

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Domestic collaboration
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Physics, Multidisciplinary
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