发表机构
Institute for Materials Research, Tohoku University（东北大学物质材料研究所学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文预言电荷有序绝缘体中由携带±2e电荷的双电荷子玻色子激发可产生电荷霍尔效应，温度梯度驱动扩散流，磁场导致横向偏转，从而在绝缘系统中实现电荷霍尔输运。
AI 中文摘要
传统霍尔效应源于导体中可移动电子电荷载流子的横向偏转。在此，我们预言了电荷有序绝缘体中由双电荷子介导的玻色子电荷霍尔效应，双电荷子是携带量子化电荷$\pm 2e$的电荷有序集体玻色子激发。与传统电子载流子相反，热激发的双电荷子气体在外加电场作用下不支持直流电传导，尽管其组成粒子携带有限电荷。我们证明，温度梯度反而能驱动热双电荷子的扩散流，而面外磁场通过洛伦兹力将带相反电荷的双电荷子偏转到相反的横向方向，从而产生有限的霍尔电荷电流以及在样品边缘的相反电荷积累。我们的结果将电荷霍尔输运的范式扩展到传统电子导体之外，确立了电荷霍尔响应可以通过带电玻色子准粒子在电学上绝缘的系统中出现。
英文摘要
The conventional Hall effect arises from the transverse deflection of mobile electronic charge carriers in conductors. Here, we predict a bosonic charge Hall effect in charge-ordered insulators mediated by bichargons, collective bosonic excitations of charge order carrying quantized electric charges $\pm 2e$. In contrast to conventional electronic carriers, a thermally excited bichargon gas does not support dc electrical conduction in response to an external electric field despite its constituents carrying finite electric charges. We show that a temperature gradient can instead drive a diffusive flow of thermal bichargons, while an out-of-plane magnetic field deflects the oppositely charged bichargons in opposite transverse directions via the Lorentz force, leading to a finite Hall charge current and opposite charge accumulations at the sample edges. Our results broaden the paradigm of charge Hall transport beyond conventional electronic conductors, establishing that a charge Hall response can emerge in an electrically \emph{insulating} system through charged bosonic quasiparticles.
