Zobrazeno 1 - 10
of 44 666
pro vyhledávání: '"Song Z."'
Thermoelectric materials traditionally incorporate heavy metals to achieve low lattice thermal conductivity. However, elements such as Te, Bi, and Pb are costly and pose environmental hazards. In this study, we introduce a novel design strategy for t
Externí odkaz:
http://arxiv.org/abs/2408.04184
Autor:
Zhang, C. H., Song, Z.
Fermions and hardcore bosons share the same restriction: no more than one particle can occupy a single site in a lattice system. Specifically, in one dimension, two systems can share the same matrix representation. In this work, we investigate both t
Externí odkaz:
http://arxiv.org/abs/2407.11509
The study of heat transport in two-dimensional (2D) materials reveals novel behaviors due to quantum confinement effects, where in-plane and out-of-plane phonons play crucial roles. In 2D materials like graphene, it is widely recognized that the out-
Externí odkaz:
http://arxiv.org/abs/2407.10435
We propose a non-Hermitian model for Cooper pair splitters, in which the process of electron tunneling into electrodes is characterized by non-Hermitian terms. We find that across a broad range of parameters, the energy levels consistently remain rea
Externí odkaz:
http://arxiv.org/abs/2407.10046
Autor:
Liu, Z., Shi, Y., Jiang, T., Luo, L., Huang, C., Mootz, M., Song, Z., Yan, Y., Yao, Y., Zhao, J., Wang, J.
Publikováno v:
PRX Energy, 3, 023009 (2024)
Entropy transfer in metal halide perovskites, characterized by significant lattice anharmonicity and low stiffness, underlies the remarkable properties observed in their optoelectronic applications, ranging from solar cells to lasers. The conventiona
Externí odkaz:
http://arxiv.org/abs/2405.03071
Autor:
Zhang, C. H., Song, Z.
Exceptional points (EPs), as an exclusive feature of a non-Hermitian system, support coalescing states to be alternative stable state beyond the ground state. In this work, we explore the influence of non-Hermitian impurities on the dynamic formation
Externí odkaz:
http://arxiv.org/abs/2404.13297
Autor:
Zhang, H. P., Song, Z.
In the Hermitian regime, the Wannier-Stark ladder characterizes the eigenstates of an electron in a periodic potential with an applied static electric field. In this work, we extend this concept to the complex regime for a periodic non-Hermitian syst
Externí odkaz:
http://arxiv.org/abs/2404.02399
Publikováno v:
Phys. Rev. B 109, 115406 (2024)
A three-dimensional non-Hermitian Hamiltonian with parity-time symmetry can exhibit a closed exceptional surface (EP surface) in momentum space, which is a non-Hermitian deformation of the degeneracy line (DL). Since the degeneracy line lacks an inte
Externí odkaz:
http://arxiv.org/abs/2402.00953
Autor:
Zhang, K. L., Song, Z.
Publikováno v:
Phys. Rev. B 109, 104312 (2024)
We investigate the impacts of an imaginary transverse field on the dynamics of magnetic domain walls in a quantum Ising chain. We show that an imaginary field plays a similar role as a real transverse field in forming a low-lying Wannier-Stark ladder
Externí odkaz:
http://arxiv.org/abs/2401.17586
We study the dynamics of the non-Hermitian Floquet Wannier-Stark system in the framework of the tight-binding approximation, where the hopping strength is a periodic function of time with Floquet frequency $\omega$. It is shown that the energy level
Externí odkaz:
http://arxiv.org/abs/2401.13286