Collective modes and the periodicity of quantum Hall stripes
العنوان: | Collective modes and the periodicity of quantum Hall stripes |
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المؤلفون: | Jurgen H. Smet, I. V. Kukushkin, K. von Klitzing, Vladimir Umansky |
المصدر: | Physical review letters. 106(20) |
سنة النشر: | 2011 |
مصطلحات موضوعية: | Physics, Wavelength, Quantum spin Hall effect, Condensed matter physics, Quantum point contact, Quasiparticle, General Physics and Astronomy, Acoustic wave, Quantum Hall effect, Roton, Quantum well |
الوصف: | We investigate the quantum Hall stripe phase at filling factor $9/2$ at the microscopic level by probing the dispersion of its collective modes with the help of surface acoustic waves with wavelengths down to 60 nm. The dispersion is strongly anisotropic. It is highly dispersive and exhibits a roton minimum for wave vectors aligned along the easy transport direction. In the perpendicular direction, however, the dispersion is featureless, although not flat as predicted by theory. Oscillatory behavior in the absorption intensity of the collective mode with a wave vector perpendicular to the stripes is attributed to a commensurability effect. It allows us to extract the periodicity of the quantum Hall stripes. |
تدمد: | 1079-7114 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f57cb633e60bd6bf1979daa21a3b9a26 https://pubmed.ncbi.nlm.nih.gov/21668254 |
حقوق: | CLOSED |
رقم الأكسشن: | edsair.doi.dedup.....f57cb633e60bd6bf1979daa21a3b9a26 |
قاعدة البيانات: | OpenAIRE |
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