Zhenhua Qiao

Nonlinear Magnetoelectric Edelstein Effect

Jinxiong Jia, Longjun Xiang, Zhenhua Qiao, Jian Wang

The generation of spin magnetization by linear and nonlinear Edelstein effects has so far relied solely on electric fields. Here, we propose a distinct mechanism, the nonlinear magnetoelectric Edelstein effect (NMEE), in which electric and magnetic fields act cooperatively to produce spin …

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Electron-Correlation-Assisted Charge Stripe Order in a Kagome Superconductor

Linwei Huai, Huachen Rao, Yulei Han, Bo Liu et autres

A central mystery in high-temperature cuprate superconductors is the coexistence of multiple exotic orders, which is presumably associated with strong electronic correlation. The ongoing interest in this enigmatic phenomenon is further energized when similar electronic orders and states emerge and coexist in …

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Pressure-Driven Moiré Potential Enhancement and Tertiary Gap Opening in Graphene/h-BN Heterostructure

Yupeng Wang, Jiaqi An, Chunhui Ye, Xiangqi Wang et autres

Moiré superlattices enable engineering of correlated quantum states through tunable periodic potentials, where twist angle controls periodicity but dynamic potential strength modulation remains challenging. Here, we develop a high-pressure quantum transport technique for van der Waals heterostructures, achieving the ultimate pressure limit …

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Tunable chiral magneto-transport through band structure engineering in magnetic topological insulators Mn(Bi 1− x Sb x ) 2 Te 4

Puyang Huang, Zeyu Li, Jieyi Liu, Qi Yao et autres

Berry curvature and spin texture are representative tuning parameters that govern spin-orbit coupling–related physics and are also the foundation for future device applications. Here, we investigate the impact of the Sb-to-Bi ratio on shaping the electronic band structure and its correlated first- …

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Fully First-Principles Approach in Studying Topological Magnons

Xiaoqiang Liu, Feng Ji, Zhenhua Qiao, Qian Niu

We develop a fully first-principles approach for spin dynamics based on density functional perturbation theory. We demonstrate that the magnon wavefunction can be expressed by a set of electronic wavefunctions obtained from the decomposition of magnon density profile, enabling the direct calculation …

Intrinsic Gyrotropic Magnetic Current from Zeeman Quantum Geometry

Longjun Xiang, Jinxiong Jia, Fuming Xu, Zhenhua Qiao et autres

Quantum geometric tensor (QGT), which is usually obtained by evaluating the quantum distance between Bloch states parametrized by momentum, plays a key role in exploring the exotic responses of quantum materials. Herein, we revisit the concept of QGT by further taking into …

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Altermagnetism Induced Topological Phase Transitions in Kane-Mele Model

Zhengtian Li, Zeyu Li, Zhenhua Qiao

We theoretically demonstrate that Chern number tunable quantum anomalous Hall effect (QAHE) and second-order topological insulators can be induced in the two-dimensional $\mathbb{Z}_2$ topological insulator (TI), i.e., Kane-Mele model, by applying $d$-wave altermagnetism. When the Néel vector of altermagentism lies in the …

Equivalence of semiclassical and response theories for second-order nonlinear ac Hall effects

Jinxiong Jia, Longjun Xiang, Zhenhua Qiao, Jian Wang

It has been known that the semiclassical and the response theories can equivalently give the Drude and the intrinsic anomalous Hall conductivities in the linear order of electric field. However, recent theoretical advances implied that the second-order nonlinear conductivities calculated with both …

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Spin Resolved Zero-Line Modes in Minimally Twisted Bilayer Graphene from Exchange Field and Gate Voltage

Sanyi You, Jiaqi An, Zhenhua Qiao

Abstract The reliance on spin-orbit coupling or strong magnetic fields has always posed significant challenges for the mass production and even laboratory realization of most topological materials. Valley-based topological zero-line modes have attracted widespread attention due to their substantial advantage of being …

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Sensing orbital hybridization of graphene-diamond interface with a single spin

Yucheng Hao, Zhiping Yang, Zeyu Li, Xi Kong et autres

Interfacial interactions are crucial in a variety of fields and can greatly affect the electric, magnetic, and chemical properties of materials. Among them, interface orbital hybridization plays a fundamental role in the properties of surface electrons such as dispersion, interaction, and ground …

Optical Berry Curvature of Hinge State and Its Detection

Zheng Liu, Zhenhua Qiao, Yang Gao, Qian Niu

We demonstrate that the topological hinge state can possess a nontrivial optical Berry curvature in the nonAbelian formulation of the Berry curvature. It can be readily probed by the circular photogalvanic effect (CPGE), with the light illuminating a specific hinge, and we …

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MX family: an efficient platform for topological spintronics based on Rashba and Zeeman-like spin splittings

Majeed Ur Rehman, Zhenhua Qiao

Taking various combinations of M = (Mo, W) and X = (C, S, Se) as examples, we propose that MX (M = transition metals, X = IV,V or VI elements) family can establish an excellent platform for both conventional and topological spintronics …

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