Chern insulators are two-dimensional magnetic topological materials that conduct electricity along their edges via the one-dimensional chiral modes. The number of these modes is a topological invariant called the first Chern number C that defines the quantized Hall conductance as S-xy = Ce-2/h. ...
Scientific Reports volume 13, Article number: 10615 (2023) Cite this article 875 Accesses Metrics details Abstract The dice lattice, containing a stack of three triangular lattices, has been proposed to exhibit nontrivial flat bands with nonzero Chern numbers, but unlike the honeycomb lattice it ...
Here, we systematically investigate the electronic properties of topological junctions formed at boundaries of QAHEs with different Chern numbers. We find that the number of chiral edge modes along the junction is determined by the difference of Chern numbers of adjacent regions, which can be ...
Signatures of two- and three-dimensional semimetals from circular dichroism Topological invariants are crucial quantities for classifying materials with topological phases. Hence, their connections with experimentally measurable qu... I Mandal - 《International Journal of Modern Physics B Condensed Matter Phy...
Two-dimensional ferromagnetic materials and related van der Waals heterostructures: a first-principl 1.IntroductionBecauseofthepredictionofLandau,peoplearealwaysuncertainoftheexistenceoftwo-dimensional(2D)materialsbeforegraphenewasexfoliatedsuccessful ...中科院半导体研究所 本站小编 Free考研考试 2022-01-01 Utilizat...
评价:一般来说,价带内部的拓扑不变量的变化很难体现在量子输运的测量中,但通过研究发现,在这个复合蜂窝双层结构中,半反手性边缘态 (half-antichiral edge states) 2e2/h 的电导平台的出现可以作为拓扑隐藏相变 (Topological hidden phase transition) 的一个重要指标或测量方法。
Nature Materials (2023) Realization of atomically flat single terminated surface of SrTiO3 (001), (110), and (111) substrate by chemical etching Anamika Kumari Anshu Gupta Suvankar Chakraverty Indian Journal of Physics (2023) Formation of Two-dimensional Electron Gas at Amorphous/Crystalline Ox...
Strain can be utilised to control the band structures of materials and can even be utilised to induce a topological phase transition, driving the normal insulators to topological non-trivial materials with non-zero Chern number or Z2 number. Here, we propose a new two-dimensional topological ...
We work on a two-dimensional square lattice of spacing a—that we set to unity—and H perpendicular to it. Our tight-binding Hamiltonian describing excitations of the d-wave superconductor in the vortex state is X H¼ r X tr;r þ dcyr;scr þ d;s þ Dr;r þ dcyr;"cyr ...
Under this context, two-dimensional (2D) ferrovalley materials with the incorporation of intrinsic magnetism into valleytronic semiconductors offer an overwhelming practical interest towards the seamless integration of spintronics and valleytronics [16]. The parallel exploitation of spin and valley degrees ...