Observing a scale anomaly and a universal quantum phase transition in graphene
| العنوان: | Observing a scale anomaly and a universal quantum phase transition in graphene |
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| المؤلفون: | Eva Y. Andrei, Yuhang Jiang, Eric Akkermans, O. Ovdat, Jinhai Mao |
| المصدر: | Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017) Nature Communications |
| بيانات النشر: | Nature Portfolio, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Quantum phase transition, Nuclear Theory, Conformal anomaly, Science, Physical system, FOS: Physical sciences, General Physics and Astronomy, 02 engineering and technology, 01 natural sciences, Phase Transition, Article, General Biochemistry, Genetics and Molecular Biology, Nuclear Theory (nucl-th), symbols.namesake, Quantum mechanics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Quantum system, lcsh:Science, 010306 general physics, Quantum, Physics, Multidisciplinary, Condensed Matter - Mesoscale and Nanoscale Physics, Temperature, General Chemistry, Fermion, 021001 nanoscience & nanotechnology, Universality (dynamical systems), Dirac fermion, symbols, Quantum Theory, Graphite, lcsh:Q, 0210 nano-technology |
| الوصف: | One of the most interesting predictions resulting from quantum physics, is the violation of classical symmetries, collectively referred to as anomalies. A remarkable class of anomalies occurs when the continuous scale symmetry of a scale free quantum system is broken into a discrete scale symmetry for a critical value of a control parameter. This is an example of a (zero temperature) quantum phase transition. Such an anomaly takes place for the quantum inverse square potential known to describe 'Efimov physics'. Broken continuous scale symmetry into discrete scale symmetry also appears for a charged and massless Dirac fermion in an attractive $1/r$ Coulomb potential. The purpose of this article is to demonstrate the universality of this quantum phase transition and to present convincing experimental evidence of its existence for a charged and massless fermion in an attractive Coulomb potential as realised in graphene. 7 pages and 6 figures + 7 pages and 5 figures of supplementary material |
| اللغة: | English |
| تدمد: | 2041-1723 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41b8d154886d1756b4420d2b1404963b https://doaj.org/article/7e9161ae57ee48f6b40ba41eb79e2875 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....41b8d154886d1756b4420d2b1404963b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20411723 |
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