تقرير
Current scaling of the topological quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator
| العنوان: | Current scaling of the topological quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator |
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| المؤلفون: | Kawamura, Minoru, Mogi, Masataka, Yoshimi, Ryutaro, Tsukazaki, Atsushi, Kozuka, Yusuke, Takahashi, Kei S., Kawasaki, Masashi, Tokura, Yoshinori |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We report a current scaling study of a quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator on the surface of a heterostructure film of magnetic topological insulators. The transition was observed by tilting the magnetization while measuring the Hall conductivity $\sigma_{xy}$. The transition curves of $\sigma_{xy}$ taken under various excitation currents cross each other at a single point, exemplifying a quantum critical behavior of the transition. The slopes of the transition curves follow a power law dependence of the excitation current, giving a scaling exponent. Combining with the result of the previous temperature scaling study, critical exponents $\nu$ for the localization length and $p$ for the coherence length are separately evaluated as $\nu$ = 2.8 $\pm$ 0.3 and $p$ = 3.3 $\pm$ 0.3. Comment: 6 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.102.041301 |
| URL الوصول: | http://arxiv.org/abs/2007.01197 |
| رقم الأكسشن: | edsarx.2007.01197 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.102.041301 |
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