Academic Journal
Localisation and transport in bidimensional random models with separable Hamiltonians
| العنوان: | Localisation and transport in bidimensional random models with separable Hamiltonians |
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| المؤلفون: | G Corona-Patricio, U Kuhl, F Mortessagne, P Vignolo, L Tessieri |
| المصدر: | New Journal of Physics, Vol 21, Iss 7, p 073041 (2019) |
| بيانات النشر: | IOP Publishing |
| سنة النشر: | 2019 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Anderson localization, wave propagation, bi-dimensional systems, electronic transmission, Science, Physics, QC1-999 |
| الوصف: | We consider two bidimensional random models characterised by the following features: (a) their Hamiltonians are separable in polar coordinates and (b) the random part of the potential depends either on the angular coordinate or on the radial one, but not on both. The disorder correspondingly localises the angular or the radial part of the eigenfunctions. We analyse the analogies and the differences which exist between the selected 2D models and their 1D counterparts. We show how the analogies allow one to use correlated disorder to design a localisation length with pre-defined energy dependence and to produce directional localisation of the wavefunctions in models with angular disorder. We also discuss the importance of finite-size and resonance effects in shaping the eigenfunctions of the model with angular disorder; for the model with disorder associated to the radial variable we show under what conditions the localisation length coincides with the expression valid in the 1D case. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1367-2630 |
| Relation: | https://doi.org/10.1088/1367-2630/ab2fd9; https://doaj.org/toc/1367-2630; https://doaj.org/article/9ac4e47f6ef04aa5b48f592641839b2a |
| DOI: | 10.1088/1367-2630/ab2fd9 |
| الاتاحة: | https://doi.org/10.1088/1367-2630/ab2fd9 https://doaj.org/article/9ac4e47f6ef04aa5b48f592641839b2a |
| رقم الانضمام: | edsbas.E8DEA66A |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 13672630 |
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| DOI: | 10.1088/1367-2630/ab2fd9 |