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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.
Original language | English |
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Article number | 224203 |
Number of pages | 7 |
Journal | Physical Review. B, Condensed matter and materials physics |
Volume | 87 |
Issue number | 22 |
DOIs | |
Publication status | Published - 26 Jun 2013 |
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Dive into the research topics of 'Helical glasses near ferromagnetic quantum criticality'. Together they form a unique fingerprint.Projects
- 1 Finished
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An Itinerant-Electron Quantum: An Itinerant-Electron Quantum Critical Points Instrinsically Multicritical?
Hooley, C. (PI) & Green, A. (CoI)
1/11/10 → 31/10/13
Project: Standard