Thomson, SJ;
Krueger, F;
Green, AG;
(2013)
Helical glasses near ferromagnetic quantum criticality.
Physical Review B
, 87
(22)
, Article 224203. 10.1103/PhysRevB.87.224203.
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Abstract
We study the effects of quenched charge disorder on the phase reconstruction near itinerant ferromagnetic quantum critical points in three spatial dimensions. Combining a Replica-disorder average with a fermionic version of the quantum order-by-disorder mechanism, we show that weak disorder destabilizes the ferromagnetic state and enhances the susceptibility towards incommensurate, spiral magnetic ordering. The Goldstone modes of the spiral phase are governed by a 3d-XY model. The induced disorder in the pitch of the spiral generates a random anisotropy for the Goldstone modes, inducing vortex lines in the phase of the helical order and rendering the magnetic correlations short ranged with a strongly anisotropic correlation length.
| Type: | Article |
|---|---|
| Title: | Helical glasses near ferromagnetic quantum criticality |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.87.224203 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevB.87.224203 |
| Language: | English |
| Additional information: | ©2013 American Physical Society |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1390990 |
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