Journal
PHYSICAL REVIEW B
Volume 87, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.224203
Keywords
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Funding
- EPSRC [EP/H049584/1]
- Scottish CM-DTC
- EPSRC [EP/H049584/1, EP/I004831/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1265378, EP/H049584/1, EP/I004831/2] Funding Source: researchfish
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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.
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