109 citations
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR22 papers
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4 papers · 1 filter
Real-space perturbation theory for frustrated magnets: application to magnetization plateaus
M. E. Zhitomirsky
We present a unified approach to the problem of degeneracy lifting in geometrically frustrated magnets with and without an external field. The method treats fluctuations around a c…
Quantum Selection of Order in an Antiferromagnet on a Kagomé Lattice
A. L. Chernyshev, M. E. Zhitomirsky
Selection of the ground state of the kagomé-lattice antiferromagnet by quantum fluctuations is investigated by combining non-linear spin-wave and real-space perturbation theo…
Role of dimensionality in spontaneous magnon decay: easy-plane ferromagnet
V. A. Stephanovich, M. E. Zhitomirsky
We calculate magnon lifetime in an easy-plane ferromagnet on a tetragonal lattice in transverse magnetic field. At zero temperature magnons are unstable with respect to spontaneous…
Nature of finite-temperature transition in anisotropic pyrochlore Er2Ti2O7
M. E. Zhitomirsky, P. C. W. Holdsworth, R. Moessner
We study the finite-temperature transition in a model XY antiferromagnet on a pyrochlore lattice, which describes the pyrochlore material Er2Ti2O7. The ordered magnetic structure s…