Anisotropic spin-spin correlations in Mn1/X(111) (X= Pd, Pt, Ag, and Au)

M. Dos Santos Dias, J. B. Staunton, A. Deak, L. Szunyogh

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We present a finite-temperature theory of the anisotropic spin-spin correlations in magnetic metallic monolayers deposited on a suitable substrate. The spins are the local moments set up by the itinerant electrons, and the key concept is the relativistic disordered local moment state, which represents the paramagnetic state of a set of local moments. The spin-spin correlations between these local moments are then extracted using the linear-response formalism. The anisotropy is included in a fully relativistic treatment, based on the Dirac equation, and has a qualitative impact on noncollinear magnetic states by lifting their chiral degeneracy. The theory is applied to Mn monolayers on the hexagonal (111) surfaces of Pd, Pt, Ag, and Au. The presence of competing exchange interactions is highlighted by choosing different substrates, which favor either the row-wise antiferromagnetic state or the chiral triangular Néel state. We correlate the electronic structure with the magnetic properties by comparing filled with partially filled substrate d bands, and low versus high atomic number. The disagreement between theory and experiment for Mn1/Ag(111) is addressed, and the nature of the magnetic domains found experimentally is suggested to be chiral.

Original languageEnglish
Article number054435
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number5
DOIs
Publication statusPublished - Aug 5 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Anisotropic spin-spin correlations in Mn<sub>1</sub>/X(111) (X= Pd, Pt, Ag, and Au)'. Together they form a unique fingerprint.

  • Cite this