论文标题
基塔夫蜂窝模型中的Majorana-Fermi表面的磁性发电
Magnetoelectric generation of a Majorana-Fermi surface in Kitaev's honeycomb model
论文作者
论文摘要
我们研究静态磁场和电场对Kitaev蜂窝模型的影响。使用适用于Kitaev材料的电动极化算子，我们在电力和磁场中得出了有效的Hamiltonian，以供出现的Majorana Fermions到二阶。我们发现，虽然每个扰动都不会在定性上改变基塔夫旋转液体，但跨学期在每个dirac节点上都会诱导有限的化学电位，从而引起Majorana-Fermi表面。我们认为这种无间隙相是稳定的，并且表现出典型的金属现象学，例如温度热容量和有限的线性，但无量化的热霍尔响应。最后，我们推测在基塔夫材料中实现这种物理的潜力。
We study the effects of static magnetic and electric fields on Kitaev's honeycomb model. Using the electric polarization operator appropriate for Kitaev materials, we derive the effective Hamiltonian for the emergent Majorana fermions to second-order in both the electric and magnetic fields. We find that while individually each perturbation does not qualitatively alter Kitaev spin liquid, the cross-term induces a finite chemical potential at each Dirac node, giving rise to a Majorana-Fermi surface. We argue this gapless phase is stable and exhibits typical metallic phenomenology, such as linear in temperature heat capacity and finite, but non-quantized, thermal Hall response. Finally, we speculate on the potential for realization of this physics in Kitaev materials.
