Quantum order-by-disorder driven phase reconstruction in the vicinity of ferromagnetic quantum critical points
| Autor: | Karahasanovic, Una, Krüger, Frank, Green, Andrew G. |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 85, 165111 (2012) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.85.165111 |
| Popis: | 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. Comment: 16 pages, 9 figures, corrected version of Eq(6) |
| Databáze: | arXiv |
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