A model for metastable magnetism in the hidden-order phase of URu2Si2
| Autor: | Victor M. Yakovenko, Lance Boyer |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Kerr effect Condensed matter physics Magnetism General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Ferromagnetism Metastability 0103 physical sciences Ginzburg–Landau theory Polar 010306 general physics 0210 nano-technology Ground state |
| Zdroj: | Annals of Physics. 388:398-407 |
| ISSN: | 0003-4916 |
| DOI: | 10.1016/j.aop.2017.11.024 |
| Popis: | We propose an explanation for the experiment by Schemm et al. (2015) where the polar Kerr effect (PKE), indicating time-reversal symmetry (TRS) breaking, was observed in the hidden-order (HO) phase of URu 2 Si 2 . The PKE signal on warmup was seen only if a training magnetic field was present on cool-down. Using a Ginzburg–Landau model for a complex order parameter, we show that the system can have a metastable ferromagnetic state producing the PKE, even if the HO ground state respects TRS. We predict that a strong reversed magnetic field should reset the PKE to zero. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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