Revealing Chern number from quantum metric
نویسندگان
چکیده
Chern number is usually characterized by Berry curvature. Here, investigating the Dirac model of even-dimensional insulator, we give general relation between curvature and quantum metric, which indicates that can be encoded in metric as well surface area Brillouin zone on hypersphere embedded Euclidean parameter space. We find there a corresponding relationship such hypersphere. geometrical property metric. Besides, protocol to measure degenerate system.
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ژورنال
عنوان ژورنال: Chinese Physics B
سال: 2022
ISSN: ['2058-3834', '1674-1056']
DOI: https://doi.org/10.1088/1674-1056/ac2f2c