نتایج جستجو برای: tight binding model

تعداد نتایج: 2499309  

Journal: :Computer Physics Communications 2022

We present a Mathematica program package MagneticTB, which can generate the tight-binding model for arbitrary magnetic space group. The only input parameters in MagneticTB are (magnetic) group number and orbital information each Wyckoff positions. Some useful functions including getting matrix expression symmetry operators, manipulating energy band structure by interfacing with other software a...

Journal: :Physical review 2021

We consider a time reversal symmetry (TRS) broken Kane-Mele model superimposed with Haldane and chart out the phase diagram using spin Chern number to investigate fate of quantum anomalous Hall insulator (QAHI) (QSHI) phases. Interestingly, in addition QSHI QAHI phase, unveils (QASHI) where only one sector is topological. also find multicritical points three / four topological boundaries coales...

Journal: :Journal of Physics: Conference Series 2016

Journal: :Journal of Physics and Chemistry of Solids 2014

Journal: :IEEE Transactions on Electron Devices 2016

Journal: :International Journal of Modern Physics B 2022

Tight-binding models represent one of the basic approaches for studying topological states a matter. In given account, we consider tight-binding model set by matrix Hamiltonian over 2D Brillouin zone. The corresponding multiband energy spectrum gives rise to non-Abelian gauge construction formed Berry connection [Formula: see text]. main invariant quantities in such cases are eigenvalues Wilson...

Journal: :Journal of Physics A: Mathematical and General 2000

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