Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Sun, Junsong"'
We investigate the non-Hermitian Su-Schrieffer-Heeger (SSH) model on Bethe lattice, revealing a novel localization phenomenon coined inner non-Hermitian skin effect. This effect is featured by the localization of all eigenstates within the bulk of th
Externí odkaz:
http://arxiv.org/abs/2409.07117
Autor:
Sun, Junsong, Li, Chang-An, Guo, Qingyang, Zhang, Weixuan, Feng, Shiping, Zhang, Xiangdong, Guo, Huaiming, Trauzettel, Björn
The first quantum fractal discovered in physics is the Hofstadter butterfly. It stems from large external magnetic fields. We discover instead a new class of non-Hermitian quantum fractals (NHQFs) emerging in coupled Hatano-Nelson models on a tree la
Externí odkaz:
http://arxiv.org/abs/2408.07355
Autor:
Zhu, Xingchuan, Sun, Junsong, Gong, Shou-Shu, Huang, Wen, Feng, Shiping, Scalettar, Richard T., Guo, Huaiming
Describing and achieving `unconventional' superconductivity remains a forefront challenge in quantum many-body physics. Here we use a unitary mapping, combined with the well-established properties of the attractive Hubbard model to demonstrate rigoro
Externí odkaz:
http://arxiv.org/abs/2404.11043
Publikováno v:
Physical Review B 108, 235412 (2023)
The Benalcazar-Bernevig-Hughes (BBH) quadrupole insulator model is a cornerstone model for higher-order topological phases. It requires \pi-flux threading through each plaquette of the two-dimensional Su-Schrieffer-Heeger model. Recent studies showed
Externí odkaz:
http://arxiv.org/abs/2309.07784
We have investigated the effects of strain on two-dimensional square lattices and examined the methods for inducing pseudo-magnetic fields. In both the columnar and staggered $\pi$-flux square lattices, we have found that strain only modulates Fermi
Externí odkaz:
http://arxiv.org/abs/2309.00212
Publikováno v:
Phys. Rev. B 108, 075122(2023)
We investigate the non-Hermitian Haldane model on hyperbolic $\{8, 3\}$ and $\{12, 3\}$ lattices, and showcase its intriguing topological properties in the simultaneous presence of non-Hermitian effect and hyperbolic geometry. From bulk descriptions
Externí odkaz:
http://arxiv.org/abs/2305.19810
Publikováno v:
PhysRevB.106.155417(2022)
We investigate the effects of a nonuniform uniaxial strain and a triaxial strain on the $\alpha-{\cal T}_3$ lattice. The analytical expressions of the pseudo-Landau levels (pLLs) are derived based on low-energy Hamiltonians, and are verified by tight
Externí odkaz:
http://arxiv.org/abs/2208.08136
Autor:
He, Beiru, Liu, Xiangcen, Zhai, Xinghui, Yuan, Chenyang, Sun, Wen, Sun, Xiaoxuan, Li, Yixin, Sun, Junsong, Zhang, Baoguo
Publikováno v:
In Process Biochemistry October 2024 145:22-31
Publikováno v:
Phys. Rev. Research 3, 043223(2021)
The pseudo-magnetic field created by a non-uniform unaxial strain is introduced into the antiferromagnetic honeycomb nanoribbons. The formation of magnon pseudo-Landau levels, which appear from the upper end of the spectrum and whose level spacings a
Externí odkaz:
http://arxiv.org/abs/2109.11189
Publikováno v:
Phys. Rev. B 104, 125117 (2021)
The honeycomb antiferromagnet under a triaxial strain is studied using the quantum Monte Carlo simulation. The strain dimerizes the exchange couplings near the corners, thus destructs the antiferromagnetic order therein. The antiferromagnetic region
Externí odkaz:
http://arxiv.org/abs/2106.04358