论文标题
Weyl半度界面中的对称和竞争订单破裂
Broken symmetry and competing orders in Weyl semimetal interfaces
论文作者
论文摘要
我们考虑了具有多个Fermi-Arc（FAR）状态的两个Weyl半角表面的相互作用引起的对称状态。在存在地面和表面库仑相互作用的情况下，可能会出现多个断裂的对称性，它们共存和/或相互竞争。涉及不同FA风味的层间激子冷凝物显示出形成，其幅度取决于相互作用的强度和弧之间的嵌套程度。对于在动量和强嵌套的动量上良好分离的FA对，结果状态是Fulde-Ferrell-Larkin-ovchinnikov（FFLO）超导体的粒子孔类似物。此外，内部的相互作用会引起电荷密度波（CDW）排序，因此系统中最一般的状态是超胚膜。这些秩序原则上以非线性行为为特征，在库仑阻力传输测量中携带狭窄的带噪声。
We consider interaction-induced broken symmetry states of two Weyl semimetal surfaces with multiple Fermi-arc (FA) states. In the presence of inter- and intra-surface Coulomb interactions, multiple broken symmetries may emerge which coexist and/or compete with one another. Interlayer exciton condensates involving different FA flavors are shown to form, with amplitudes determined by the strength of interactions and the degree of nesting among the arcs. For FA pairs which are well-separated in momentum with strong nesting, the resulting state is a particle-hole analog of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductor. Intralayer interactions moreover induce charge density wave (CDW) ordering, so that the most general state of the system is a supersolid. These orderings in principle carry signatures in non-linear behavior and narrow band noise in Coulomb drag transport measurements.
