کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7933294 1512848 2018 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Redistributing Chern numbers and quantum Hall transitions in multi-band lattices
ترجمه فارسی عنوان
مجددا شماره های چرن و انتقال هال های کوانتومی در شبکه های چندبازی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
We numerically study the integer quantum Hall effect (IQHE) on m-band lattices. With continuous modulating the next-nearest-neighbor hopping integral t', it is found that the full band is divided into 2m−1 regions. There are m−1 critical regions with pseudogaps induced by the merging between the two adjacent subbands, where both Chern numbers of the correlating Landau subbands and the corresponding Hall plateau are not well-defined. The other m regions with different well-defined Chern numbers are separated by the above m−1 critical regions. Due to the redistributing Chern numbers of system induced by the merging of subbands, the Hall conductance exhibits a peculiar phase transition, which is characterized by the direct change of Hall plateau state.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 101, July 2018, Pages 220-223
نویسندگان
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