论文标题
多谷电子气体中Wigner晶体的伪旋转顺序
Pseudo-spin order of Wigner crystals in multi-valley electron gases
论文作者
论文摘要
我们研究低密度（$ r_s \ gg 1 $）限制的多谷电子气体。在这里，地面始终是wigner晶体（WC），并带有其他伪旋转顺序，其中伪旋转与山谷占领有关。根据宿主半导体的对称性以及参数的值，例如有效的质量张量的各向异性，我们找到了条纹或手性的伪旋转抗fiferromagnet，或时间反向旋风旋转的循环循环循环划分的伪有序的有序序列的pseudo pseudo-spin-spin ferromagagnet。我们的理论适用于Alas中最近发现的WC状态，以及单层和双层过渡金属二核苷。我们确定了一组有趣的电子液体晶体相，这些阶段通过这种WC的连续量子熔化可能出现。
We study multi-valley electron gases in the low density ($r_s \gg 1$) limit. Here the ground-state is always a Wigner crystal (WC), with additional pseudo-spin order where the pseudo-spins are related to valley occupancies. Depending on the symmetries of the host semiconductor and the values of the parameters such as the anisotropy of the effective mass tensors, we find a striped or chiral pseudo-spin antiferromagnet, or a time-reversal symmetry breaking orbital loop-current ordered pseudo-spin ferromagnet. Our theory applies to the recently-discovered WC states in AlAs and in mono and bilayer transition metal dichalcogenides. We identify a set of interesting electronic liquid crystalline phases that could arise by continuous quantum melting of such WCs.
