Anomalous spin resonance around even fillings in the quantum Hall regime
| العنوان: | Anomalous spin resonance around even fillings in the quantum Hall regime |
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| المؤلفون: | I. V. Kukushkin, Yu. A. Nefyodov, A. V. Shchepetilnikov, A. R. Khisameeva |
| المصدر: | Physical Review B. 104 |
| بيانات النشر: | American Physical Society (APS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Physics, Condensed matter physics, Spin polarization, Filling factor, Resonance, Quantum Hall effect, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, law.invention, Effective mass (solid-state physics), law, Condensed Matter::Strongly Correlated Electrons, Ground state, Electron paramagnetic resonance, Spin-½ |
| الوصف: | The electron spin resonance (ESR) of two-dimensional electrons with large effective mass was studied experimentally near even filling factors of the integer quantum Hall effect. Surprisingly, the electron spin resonance did not vanish at the exact even fillings even in the case of large electron densities, where the ground state of the system was previously reported to be paramagnetic. Furthermore, the ESR amplitude was comparable between even and odd fillings. Such anomalous behavior suggests a substantial degree of spin polarization of the even fillings and was observed in two different material systems, namely AlAs quantum wells and ZnO/MgZnO heterojunctions. In AlAs quantum wells, spin resonance tended to split into two well-resolved lines near even fillings whereas it remained a single peak near odd ones. The evolution of ESR with varying filling factor around even fillings is studied in detail. The reported nontrivial findings suggest the modification of the ground state around even filling factors with the aid of strong $e\text{\ensuremath{-}}e$ interaction and may be viewed as a precursor for the Stoner instability. |
| تدمد: | 2469-9969 2469-9950 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::546e7b551b7a8c369ddef359191cb66d https://doi.org/10.1103/physrevb.104.075437 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........546e7b551b7a8c369ddef359191cb66d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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