Metallic Surface Reconstruction Driven by Frustrated Antiferromagnetism

Abstract

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.

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

References in corpus (2)

• Metallic charge density waves and surface Mott insulators for adlayer structures on semiconductors: extended Hubbard modeling
• First Principles Calculations of Charge and Spin Density Waves of sqr3-Adsorbates on Semiconductors

Cited by in corpus (2)

• Correlated partial disorder in a weakly frustrated quantum antiferromagnet
• Effects of spin-elastic interactions in frustrated Heisenberg antiferromagnets