TITLE

Strong magnetic frustration and anti-site disorder causing spinglass behavior in honeycomb Li2RhO3

AUTHOR(S)
Katukuri, Vamshi M.; Satoshi Nishimoto; Rousochatzakis, Ioannis; Stoll, Hermann; van den Brink, Jeroen; Liviu Hozoi
PUB. DATE
October 2015
SOURCE
Scientific Reports;10/9/2015, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
With large spin-orbit coupling, the t2g5 electron configuration in d-metal oxides is prone to highly anisotropic exchange interactions and exotic magnetic properties. In 5d5 iridates, given the existing variety of crystal structures, the magnetic anisotropy can be tuned from antisymmetric to symmetric Kitaev-type, with interaction strengths that outsize the isotropic terms. By many-body electronicstructure calculations we here address the nature of the magnetic exchange and the intriguing spinglass behavior of Li2RhO3, a 4d5 honeycomb oxide. For pristine crystals without Rh-Li site inversion, we predict a dimerized ground state as in the isostructural 5d5 iridate Li2IrO3, with triplet spin dimers effectively placed on a frustrated triangular lattice. With Rh-Li anti-site disorder, we explain the observed spin-glass phase as a superposition of different, nearly degenerate symmetry-broken configurations.
ACCESSION #
110327882

 

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