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 th
Mn and Co), where the LaXO3trilayer forms a dice lattice that consists of a central layer and two interface layers.aa1andaa2are the lateral lattice vectors of the dice lattice andccis the out-of-plane lattice vector. (c) Two-dimensional Brillouin zone of the dice lattice withbb1,bb2being...
Ji-Huan Guan, Wen-Kai Lou*, and Kai Chang*,Topological hidden phase transition in honeycomb bilayers with a high Chern number,Phys. Rev. B110, 165303 (2024). [Editors' Suggestion] 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...
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 ...
Moiré systems made from stacked two-dimensional materials host correlated and topological states that can be electrically controlled with applied gate voltages. One prevalent form of topological state that can occur are Chern insulators that display a quantum anomalous Hall effect. Here we manipulate Ch...
Nature Materials 9, 889 (2010). 29. Kane, C. L. & Mele, E. J. Quantum spin Hall effect in graphene. Phys. Rev. Lett. 95, 226801 (2005). 30. Liu, C.-C., Jiang, H. & Yao, Y. Low-energy effective Hamiltonian involving spin- orbit coupling in silicene and two-dimensional ...
In addi- tion, novel approaches including nanocomposites, carrier filtering, low-dimensional materials, and phonon scattering are being investigated to improve the functionality of TE materials.15,16 Among the various TE material systems studied, skut- terudites have received substantial attention. ...
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 ...
For n receivers, the number of such locations is n-1. We were looking so far at a one-dimensional case. To consider a two-dimensional case, the string of receivers has to be rotated K times around the X axis by an angle , so that (К)=. The required number ...
As the thicknesses of microdisk are usually much smaller than their diameter, the three-dimensional structures of microdisks can be simplified to two-dimensional shapes by using effective refractive index n. In the following, we set n 5 3.3 [for GaAs] for the circular disk and annular ring....