7 papers · 1 filter
Symmetry-enforced third-order nonlinear thermal Hall effects in altermagnets
Yun-Mei Li, Jiacheng Yao, Hua Wang +1
Thermal Hall effect (THE) is a powerful probe of material properties, even in insulators. Here we investigate the thermal response of altermagnets by developing a theory on Berry c…
Imaging the Néel Vector in Two-Dimensional Antiferromagnets using Antisymmetric Compton Scattering
Wuxuan Li, Zhuocheng Lu, Jingshan Qi +2
We demonstrate that antisymmetric Compton scattering can detect both the switching and the continuous rotation of the Néel vector in two-dimensional (2D) antiferromagnets. By probi…
Pure momentum-shift bulk photovoltaic effect in ferroelectric flat-band Mott insulators
Zhuocheng Lu, Zhihao Gong, Jingshan Qi +2
The shift current photovoltaic effect is conventionally understood as the real-space displacement of a wave packet induced by photoexcitation. However, this interpretation becomes…
Quantum Geometric Origin of Strain-Induced Ferroelectric Phase Transitions
Jiaming Hu, Ziye Zhu, Yubo Yuan +3
Strain-regulated ferroelectric (FE) materials have long attracted significant attention due to their diverse applications. While soft-phonon theory and the (pseudo) Jahn-Teller eff…
Geodesic nature and quantization of shift vector
Hua Wang, Kai Chang
We present the geodesic nature and quantization of geometric shift vector in quantum systems, with the parameter space defined by the Bloch momentum, using the Wilson loop approach…
One-dimensional Multiferroic Semiconductor WOI3: Unconventional Anisotropic d^1 Rule and Bulk Photovoltaic Effect
Zhihao Gong, Yechen Xun, Zhuang Qian +3
The pursuit of multiferroic magnetoelectrics, combining simultaneous ferroelectric and magnetic orders, remains a central focus in condensed matter physics. Here we report the cent…
Ferroelastic twin wall mediated ferro-flexoelectricity and bulk photovoltaic effect in SrTiO
Ri He, Haowei Xu, Peijun Yang +3
Ferroelastic twin walls in nonpolar materials can give rise to a spontaneous polarization due to symmetry breaking. Nevertheless, the bi-stable polarity of twin walls and its rever…