Magnetic properties and concurrence for fluid 3He on kagome lattice

Skyrmion fluid and bimeron glass protected by a chiral spin liquid on a kagome lattice

Skyrmions are of interest both from a fundamental and technological point of view, due to their potential to act as information carriers. But one challenge concerns their manipulation, especially at high temperature where thermal fluctuations eventually disintegrate them. Here we study the competition between skyrmions and a chiral spin liquid, using the latter as an entropic buffer to impose a quasi-vacuum of skyrmions. As a result, the temperature becomes a knob to tune the skyrmion density from a dense liquid to a diluted gas, protecting the integrity of each skyrmion from paramagnetic disi…

Entanglement and quantum phase transition in the one-dimensional anisotropic XY model

In this paper the entanglement and quantum phase transition of the anisotropic s=1/2 XY model are studied by using the quantum renormalization group method. By solving the renormalization equations, we get the trivial fixed point and the untrivial fixed point which correspond to the phase of the system and the critical point, respectively. Then the concurrence between two blocks are calculated and it is found that when the number of the iterations of the renormalziation trends infinity, the concurrence develops two staturated values which are associated with two different phases, i.e., Ising-l…

可调的skyrmion和反skyrmion流体通过机械应变在手性kagome晶格中

Tuneable skyrmion and anti-skyrmion fluids via mechanical strain in chiral kagome lattice

通过机械应变调控手性kagome晶格中的skyrmion和反skyrmion稳定性及拓扑相变。

Inverse Design for Self Assembly via On-the-Fly Optimization

Inverse methods of statistical mechanics have facilitated the discovery of pair potentials that stabilize a wide variety of targeted lattices at zero temperature. However, such methods are complicated by the need to compare, within the optimization framework, the energy of the desired lattice to all possibly relevant competing structures, which are not generally known in advance. Furthermore, ground-state stability does not guarantee that the target will readily assemble from the fluid upon cooling from higher temperature. Here, we introduce a molecular dynamics simulation-based, optimization …

从手性自旋液体到 skyrmion 流体与晶体，及其与巡游电子的相互作用

From chiral spin liquids to skyrmion fluids and crystals, and their interplay with itinerant electrons

本文研究 kagome 晶格中 skyrmion 与手性自旋液体的竞争，通过 Luttinger-Tisza 近似和 Monte-Carlo 模拟揭示 skyrmion 流体、熔化及 Z_3 有序相，并分析其对传导电子拓扑量子霍尔效应的影响。