Probing persistent spin textures through nonlinear magnetotransport
Indian Institute of Technology, Kanpur（坎普尔印度理工学院）；National Institute of Science Education and Research（国家科学教育与研究中心）；Homi Bhabha National Institute（霍米·巴巴国家研究所）；National Institute of Technology Silchar（西尔恰尔国立技术学院）；Max-Planck Institute for the Physics of Complex Systems（马克斯·普朗克复杂系统物理研究所）
Persistent spin textures (PST) are special spin configurations in spin-orbit-coupled systems in which the spin polarization acquires a symmetry-enforced momentum-independent orientation, leading to exceptionally long spin lifetimes and persistent spin helices. Identifying direct experimental probes of PST, however, remains challenging because conventional quantum-geometric responses are strongly suppressed in this regime. Here, we show that PST systems isolate spin-rotation quantum geometry, which manifests through distinctive nonlinear magnetotransport responses. Using both a fine-tuned Rashba-Dresselhaus two-dimensional electron gas and a symmetry-enforced cubic spin-splitting model realizing PST, we demonstrate that PST suppresses conventional and Zeeman quantum-geometric contributions, leaving the spin-rotation quantum geometric tensor as the sole source of nonlinear magnetic-current and spin-magnetization responses. Remarkably, the nonvanishing response components exhibit identical direction-independent behavior as a function of chemical potential, providing a distinctive signature of PST. We further show that, in the Rashba-Dresselhaus two-dimensional electron gas at the PST point, these qualitative signatures remain robust even in the presence of a cubic Dresselhaus term that breaks the exact SU(2) symmetry. Our results establish nonlinear magnetotransport as an experimentally accessible probe of PST and their underlying spin-rotation quantum geometry.
Robust magnetotransport in disordered ferromagnetic kagome layers with quantum anomalous Hall effect
对无序铁磁可果美层的磁输运性质进行了数值研究。我们发现在可果美层状材料（如Fe $_3$ Sn $_2$，Co $_3$ Sn $_2$ S $_2$，和Mn $_3$ Sn）中可以实现大的畴壁磁电阻或负磁电阻，表现出量子反常霍尔效应.戈薇层表现出强烈的磁各向异性和大的磁阻取决于它们的磁织构。这些畴壁磁阻预计将是强大的，对无序和观察无关的畴壁厚度，在铁磁金属中的常规畴壁磁阻。
Spin Chern phases and persistent spin texture in a quasi 2D SSH model
National Institute of Science Education and Research（国家科学教育研究中心）；Homi Bhabha National Institute（霍米·巴巴国立研究所）；Institute of Physics（物理研究所）；Max-Planck Institute for the Physics of Complex Systems（马克斯·普朗克复杂系统物理研究所）
Persistent spin texture preserved by local symmetry in graphene/WTe$_2$ heterostructure
Zernike Institute for Advanced Materials, University of Groningen（格罗宁根大学泽尔尼克高级材料研究所）；Faculty of Physics and Applied Informatics, University of Łódź（罗兹大学物理与应用信息学院）
Stacking switching between correlation-protected radial Rashba field and persistent spin textures in graphene encapsulated by 1T-TaS$_2$ monolayers
Institute of Physics, Pavol Jozef Šafárik University in Košice（帕沃尔·约瑟夫·沙法里克大学科希策物理研究所）；Institute of Informatics, Slovak Academy of Sciences（斯洛伐克科学院信息学研究所）；Faculty of Physics, University of Belgrade（贝尔格莱德大学物理学院）；Institute of Experimental Physics, Slovak Academy of Sciences（斯洛伐克科学院实验物理研究所）；New Technologies Research Centre, University of West Bohemia（西波希米亚大学新技术研究中心）
Persistent Interfacial Topological Hall Effect Demonstrating Electrical Readout of Topological Spin Structures in Insulators
University of Nebraska, Lincoln（内布拉斯加大学林肯分校）；Fudan University（复旦大学）；North Carolina State University（北卡罗来纳州立大学）；Georgia Institute of Technology（佐治亚理工学院）；Bryn Mawr College（布林茅尔学院）；Argonne National Laboratory（阿贡国家实验室）
Giant topological Hall effect in strained Fe$_{0.7}$Co$_{0.3}$Si epilayers
电子自旋与实空间磁织构的耦合导致了各种有趣的磁输运效应。在手性B20晶格磁体中经常发现的skyrmionic自旋织构通过实空间Berry相引起拓扑霍尔效应，但它通常相当小。在这里，B20有序的Fe $_{0.7}$ Co $_{0.3}$ Si外延层显示出巨大的拓扑霍尔效应由于三个有利的属性的组合：它们具有高的自旋极化，一个大的普通霍尔系数，和致密的手性自旋纹理。拓扑霍尔电阻率在氦气温度下高达820 n $Ω$ cm。此外，我们观察到的100 N $Ω$厘米的纵向电阻率下降，在低温下在相同的字段范围内，这表明它也是拓扑起源。在商业硅片上以薄膜形式生长的材料中可以发现这种强烈的效应，这对基于skyrmion的自旋电子学来说是个好兆头。
Max Planck Institute for the Physics of Complex Systems（马克斯·普朗克复杂系统物理研究所）；Institute of Physics, Czech Academy of Sciences（捷克科学院物理研究所）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）
Topological Surface States with Persistent High Spin Polarization across Dirac Point in Bi$_{2}$Te$_{2}$Se and Bi$_{2}$Se$_{2}$Te
利用自旋和角度分辨光电子能谱首次揭示了两种具有应用前景的拓扑绝缘体Bi $_2$ Te $_2$ Se和Bi $_2$ Se $_2$ Te的螺旋自旋织构及其拓扑表面态的显著自旋极化.发现这两种化合物的高自旋极化性质在狄拉克点附近是持久的。这一新的发现铺平了道路，以扩大他们的利用拓扑表面状态为未来的自旋电子应用。
Encoding information onto the charge and spin state of a paramagnetic atom using MgO tunnelling spintronics
Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS, Université de Strasbourg（斯特拉斯堡材料与化学物理研究所，CNRS联合研究单位7504，斯特拉斯堡大学）；Institut Jean Lamour UMR 7198 CNRS Université de Lorraine（让·拉默尔研究所，CNRS联合研究单位7198，洛林大学）；Institut de Chimie UMR 7177 CNRS Université de Strasbourg（化学研究所，CNRS联合研究单位7177，斯特拉斯堡大学）
