کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5491731 | 1525122 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three-band k.p Hamiltonian of monolayer MoS2 based on the group theory and infinitesimal basis transformations approach
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Three-band k.p Hamiltonian of monolayer MoS2 based on the group theory and infinitesimal basis transformations approach Three-band k.p Hamiltonian of monolayer MoS2 based on the group theory and infinitesimal basis transformations approach](/preview/png/5491731.png)
چکیده انگلیسی
In this work, we present the matrix representation of three-band low-energy k.p Hamiltonian of monolayer MoS2 (ML-MDS) based on the group theory and infinitesimal basis transformations approach. We have derived the matrix representation of k.p Hamiltonian up to the second-order of perturbation at the Î point of the Brillouin zone. Due to the symmetries of doubly degenerate conduction band (CB), namely the CB+1 and (CB+1)', the optical transitions from these bands to valance band (VB) are allowed. Therefore, we have chosen three bands to describe the dynamics of ML-MDS around the Î point. We have obtained three main 3 Ã 3 matrices including a zero-order matrix describing the edge band energies, a first-order matrix describing the coupling of VB, CB + 1, and (CB + 1)' away from the Î point, and a second-order matrix which is itself consisted of three matrices as a free-electron energy matrix, an isotropic diagonal matrix and a anisotropic matrix. The whole matrix definitely show the isotropic and parabolic properties of VB and the anisotropy property of two degenerate CB + 1 and (CB + 1)'.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 527, 15 December 2017, Pages 66-71
Journal: Physica B: Condensed Matter - Volume 527, 15 December 2017, Pages 66-71
نویسندگان
Khadijeh Beiranvand, Abdolmohammad Ghalambor Dezfuli, Mohammad Sabaeian,