Zobrazeno 1 - 10
of 1 506
pro vyhledávání: '"Dai, Xi"'
Chern insulators are topologically non-trivial states of matter characterized by incompressible bulk and chiral edge states. Incorporating topological Chern bands with strong electronic correlations provides a versatile playground for studying emerge
Externí odkaz:
http://arxiv.org/abs/2406.08734
Autor:
Shao, Yuelin, Dai, Xi
We investigate the electrical transport properties of the mini-valley polarized state proposed recently in slightly doped Bernal Bilayer Graphene (BLG) in large electric displacement fields. By minimizing the Hartree-Fock energy functional, we first
Externí odkaz:
http://arxiv.org/abs/2403.19498
Electron-phonon coupling in magic-angle twisted bilayer graphene is an important but difficult topic. We propose a scheme to simplify and understand this problem. Weighted by the coupling strength with the low-energy heavy electrons ($f$ orbitals), s
Externí odkaz:
http://arxiv.org/abs/2402.11824
We study the exciton condensation in the heterostructures where the electron layer and hole layer formed by gapped chiral Fermion (GCF) systems are separately gated. High-angular momentum such as p- and d-wave like excitonic pairing may emerge when t
Externí odkaz:
http://arxiv.org/abs/2401.04416
Autor:
Shao, Yuelin, Dai, Xi
We study the quantum oscillations of inter-layer capacitance in an excitonic insulating electron-hole double layer with the Hartree Fock mean-field theory. Such oscillations could be simply understood from the physical picture ``exciton formed by ele
Externí odkaz:
http://arxiv.org/abs/2401.01605
Autor:
Yao, Jingyu, Sheng, Haohao, Zhang, Ruihan, Pang, Rongtian, Zhou, Jin-Jian, Wu, Quansheng, Weng, Hongming, Dai, Xi, Fang, Zhong, Wang, Zhijun
By systematic theoretical calculations, we have revealed an excitonic insulator (EI) in a van der Waals (vdW) layered compound Ta2Pd3Te5. The interlayer binding energy in the vdW layered compound is 19.6 meV/$\unicode{x212B}$$^2$. The computed phonon
Externí odkaz:
http://arxiv.org/abs/2401.01222
Autor:
Chen, Hao, Hu, Yu-Min, Zhang, Wucheng, Kurniawan, Michael Alexander, Shao, Yuelin, Chen, Xueqi, Prem, Abhinav, Dai, Xi
Publikováno v:
Phys. Rev. B 109, 184309 (2024)
In this article, we investigate periodically driven open quantum systems within the framework of Floquet-Lindblad master equations. Specifically, we discuss Lindblad master equations in the presence of a coherent, time-periodic driving and establish
Externí odkaz:
http://arxiv.org/abs/2401.00131
Autor:
Zhang, Sheng, Sheng, Haohao, Song, Zhi-Da, Liang, Chenhao, Jiang, Yi, Sun, Song, Wu, Quansheng, Weng, Hongming, Fang, Zhong, Dai, Xi, Wang, Zhijun
Publikováno v:
Chin. Phys. Lett. 40, 127101 (2023)
The $k\cdot p$ method is significant in condensed matter physics for the compact and analytical Hamiltonian. In the presence of magnetic field, it is described by the effective Zeeman's coupling Hamiltonian with Land\'e $ g $-factors. Here, we develo
Externí odkaz:
http://arxiv.org/abs/2312.08729
Autor:
Zheng, Lixuan, Luo, Kaifa, Sun, Zeliang, Zhao, Dan, Li, Jian, Song, Dianwu, Li, Shunjiao, Kang, Baolei, Nie, Linpeng, Shan, Min, Wu, Zhimian, Zhou, Yanbing, Dai, Xi, Weng, Hongming, Yu, Rui, Wu, Tao, Chen, Xianhui
Publikováno v:
Sci. China-Phys. Mech. Astron. 66, 117011 (2023)
Revealing the role of Coulomb interaction in topological semimetals with Dirac/Weyl-like band dispersion shapes a new frontier in condensed matter physics. Topological node-line semimetals (TNLSMs), anticipated as a fertile ground for exploring elect
Externí odkaz:
http://arxiv.org/abs/2310.16311
We predict two topological phase transitions for cadmium arsenide (\ce{Cd3As2}) thin films under in-plane magnetic field, taking advantage of a four-band $k\cdot p$ model and effective $g$ factors calculated from first principles. Film thickness, gro
Externí odkaz:
http://arxiv.org/abs/2309.15457