Metallic Surface Reconstruction Driven by Frustrated Antiferromagnetism

Details Metallic Surface Reconstruction Driven by Frustrated Antiferromagnetism Metallic Surface Reconstruction Driven by Frustrated Antiferromagnetism

1998-11-11

arxiv.org/abs/cond-mat/9811164v1

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages of PLAIN TeX, 2 postscript figures, to appear in Physical Review B

Scientific paper

10.1103/PhysRevB.59.R705

A magnetic origin for the honeycomb reconstruction of metallic surfaces with three-fold symmetry like Pb/Ge (111) is proposed. Assuming that the groundstate is an antiferromagnetic insulator over the triangular lattice of adatom sites (Pb), we demonstrate that the former is simultaneously unstable to canting and to a structural distortion if the surface is soft enough. We therefore predict a net magnetization over the reconstructed surface at sufficiently low temperature.

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