Zobrazeno 1 - 10
of 641
pro vyhledávání: '"Chang, Yia‐Chung"'
The Semiempirical Pseudopotential Method (SEPM) has emerged as a valuable tool for accurately determining band structures, especially in the realm of low-dimensional materials. SEPM operates by utilizing atomic pseudopotentials, which are derived fro
Externí odkaz:
http://arxiv.org/abs/2406.15913
Autor:
Kuo, David M T, Chang, Yia-Chung
Transport and thermoelectric properties of finite textured graphene nanoribbons (t-GNRs) connected to electrodes with various coupling strengths are theoretically studied in the framework of the tight-binding model and Green's function approach. Due
Externí odkaz:
http://arxiv.org/abs/2208.10783
Autor:
Chang, Yao-Wen, Chang, Yia-Chung
Publikováno v:
Phys. Rev. B 106, 245412 (2022)
We propose a new mechanism to explain the quantum anomalous Hall (QAH) effect and the electric-field-induced topological phase transition in AB-stacked MoTe${}_2$/WSe${}_2$ moir\'e heterobilayers at $\nu=1$ hole filling. We suggest that the Chern ban
Externí odkaz:
http://arxiv.org/abs/2203.10088
Publikováno v:
In Solid State Communications 1 November 2024 391
Autor:
Ren, Chung-Yuan, Chang, Yia-Chung
We implement a total-energy minimization scheme to allow for relaxation of atomic positions in density functional calculations for two-dimensional (2D) systems using a mixed basis set. The basis functions consist of products of 2D plane waves in the
Externí odkaz:
http://arxiv.org/abs/2110.12686
Autor:
Chang, Yao-Wen, Chang, Yia-Chung
In this work, we provide a detailed derivation of Foldy-Wouthuysen (FW) transformation for two-dimensional (2D) gapped Dirac fermions under external fields and apply the formalism to study valley excitons in 2D semiconducting materials. Similar to re
Externí odkaz:
http://arxiv.org/abs/2107.14474
This work reports comprehensive theoretical modeling of photocurrent spectra generated by an In$_{0.91}$Ga$_{0.09}$N/In$_{0.4}$Ga$_{0.6}$N disk-in-wire photodiode. The strain distribution is calculated by valence-force-field (VFF) model, while a real
Externí odkaz:
http://arxiv.org/abs/2105.05414
Autor:
Altaiary, Mashael M., Liu, Erfu, Liang, Ching-Tarng, Hsiao, Fu-Chen, van Baren, Jeremiah, Taniguchi, Takashi, Watanabe, Kenji, Gabor, Nathaniel M., Chang, Yia-Chung, Lui, Chun Hung
We report the direct observation of intervalley exciton between the Q conduction valley and $\Gamma$ valence valley in bilayer WSe$_2$ by photoluminescence. The Q$\Gamma$ exciton lies at ~18 meV below the QK exciton and dominates the luminescence of
Externí odkaz:
http://arxiv.org/abs/2101.11161
Autor:
Chang, Yao-Wen, Chang, Yia-Chung
In this work, trions in two-dimensional (2D) space are studied by variational method with trial wavefunctions being constructed by linear combinations of 2D slater-type orbitals (STOs). Via this method, trion energy levels and wavefunctions can be ca
Externí odkaz:
http://arxiv.org/abs/2011.04153
Autor:
Van Nguyen, Khoe, Chang, Yia-Chung
Publikováno v:
Phys. Rev. B 103, 045425 (2021)
In this work, we resolved some controversial issues on the Bloch-Gr\"{u}neisen (BG) temperature in doped graphene via analytical and numerical calculations based on full inelastic electron-acoustic-phonon (EAP) scattering rate and various approximati
Externí odkaz:
http://arxiv.org/abs/2007.00839