Skyrmion lattice phase in three-dimensional chiral magnets from Monte Carlo simulations

By S. Buhrandt, L. Fritz. 2013

136 citations recorded by the source corpus.

Chiral magnets, such as MnSi, display a rich finite temperature phase diagram in an applied magnetic field. The most unusual of the phases encountered is the so called A-phase characterized by a triangular lattice of skyrmion tubes. Its existence cannot be captured within a mean-field treatment of a Landau-Ginzburg functional but thermal fluctuations to Gaussian order are required to stabilize it. In this note we go beyond Gaussian order in a fully non-perturbative study of a three dimensional lattice spin model using classical Monte Carlo simulations. We demonstrate that the A-phase is indeed stabilized by thermal fluctuations and furthermore we reproduce the full phase diagram found in experiment. The thermodynamic signatures of the helimagnetic transition upon cooling from the paramagnet are qualitatively consistent with experimental findings and lend further support to the Brazovskii scenario which describes a fluctuation driven first order transition due to the abundance of soft modes.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/feb9fe961f9859c0d4241016d61c7a8e9af15227

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. Achim Rosch
2. C. Pfleiderer
3. N. Nagaosa

In Condensed Matter Physics

1. Achim Rosch
2. C. Pfleiderer
3. N. Nagaosa

Citations in the corpus

• Observation of two independent skyrmion phases in a chiral magnetic material (2018, background): “Quantitative calculations established that the skyrmion lattice in these materials is stabilized by thermal fluctuations akin to the notion of order-by-disorder [5, 13].”