Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2012-01-18
Phys. Rev. B 85, 165111 (2012)
Physics
Condensed Matter
Strongly Correlated Electrons
16 pages, 9 figures, corrected version of Eq(6)
Scientific paper
10.1103/PhysRevB.85.165111
The formation of new phases close to itinerant electron quantum critical points has been observed experimentally in many compounds. We present a unified analytical model that explains the emergence of new types of order around itinerant ferromagnetic quantum critical points. The central idea of our analysis is that certain Fermi-surface deformations associated with the onset of the competing order enhance the phase-space available for low-energy quantum fluctuations and so self-consistently lower the free energy. We demonstrate that this quantum order-by-disorder mechanism leads to instabilities towards the formation of spiral and d-wave spin nematic phases close to itinerant ferromagnetic quantum critical points in three spatial dimensions.
Green Andrew G.
Karahasanovic Una
Krüger Frank
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