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Magnetic skyrmions are particle-like topological excitations in ferromagnets, which have the topological number $Q=\pm 1$, and hence show the skyrmion Hall effect (SkHE) due to the Magnus force effect originating from the topology. Here, we…

介观与纳米尺度物理 · 物理学 2016-04-25 Xichao Zhang , Yan Zhou , Motohiko Ezawa

We theoretically investigate the intrinsic magnon orbital Nernst effect (ONE) in noncollinear antiferromagnets with Kagom\'e spin systems. Our analysis reveals that an externally applied magnetic field induces topological phase transitions…

In electronic topological Dirac semimetals the conduction and valence bands touch at discrete points in the Brillouin zone and form Dirac cones. They are robust against spin-orbit interaction (SOI) and protected by crystal symmetries. They…

强关联电子 · 物理学 2017-09-27 S. A. Owerre

In this work, we study topological properties of magnons via creating spin excitations in both ferromagnets and antiferromagnets in presence of an external magnetic field on a two-dimensional square lattice. It is known that…

介观与纳米尺度物理 · 物理学 2024-07-23 Shreya Debnath , Saurabh Basu

We consider phase-biased Josephson junctions with spin-orbit coupling under external magnetic fields and study the emergence of the Josephson diode effect in the presence of Majorana bound states. We show that junctions having middle…

超导电性 · 物理学 2024-03-08 Jorge Cayao , Naoto Nagaosa , Yukio Tanaka

Spin Seebeck effect (SSE) refers to the creation of spin currents due to a temperature gradient in the magnetic materials or across magnet-normal metal interfaces, which can be electrically detected through the inverse spin Hall effect…

We study gauge fields produced by gradients of the Dzyaloshinskii-Moriya interaction and propose a model of AFM topological insulator of magnons. In the long wavelength limit, the Landau levels induced by the inhomogeneous…

介观与纳米尺度物理 · 物理学 2021-01-04 Bo Li , Alexey A. Kovalev

Topological magnetic textures, characterized by integer topological charge $S$, are potential candidates in future magnetic logic and memory devices, due to their smaller size and expected low threshold current density for their motion. An…

Topological magnons are emergent quantum spin excitations featured by magnon bands crossing linearly at the points dubbed nodes, analogous to fermions in topological electronic systems. Experimental realization of topological magnons in…

Topological antiferromagnetic (AFM) spintronics is an emerging field of research, which involves the topological electronic states coupled to the AFM order parameter known as the N$\acute{\rm e}$el vector. The control of these states is…

介观与纳米尺度物理 · 物理学 2019-10-02 Hiroyuki Takenaka , Shane Sandhoefner , Alexey A. Kovalev , Evgeny Y. Tsymbal

Topological semimetals are characterized by their intriguing Fermi surfaces (FSs) such as Weyl and Dirac points, or nodal FS, and their associated surface states. Among them, topological crystalline semimetals, in the presence of strong…

强关联电子 · 物理学 2018-05-09 Jacob S. Gordon , Hae-Young Kee

Topology is quickly becoming a cornerstone in our understanding of electronic systems. Like their electronic counterparts, bosonic systems can exhibit a topological band structure, but in real materials it is difficult to ascertain their…

强关联电子 · 物理学 2019-09-04 Daniel Malz , Johannes Knolle , Andreas Nunnenkamp

The realization of topological antiferromagnetic (AFM) solitons in real materials is a major goal towards their use in information technology. While they bear various advantages with respect to their ferromagnetic cousins, their observation…

材料科学 · 物理学 2023-06-09 Amal Aldarawsheh , Moritz Sallermann , Muayad Abusaa , Samir Lounis

Antiferromagnetic (AFM) materials with zero or vanishingly small macroscopic magnetization are nowadays the constituent elements of spintronic devices. However, possibility to use them as active elements that show nontrivial controllable…

材料科学 · 物理学 2013-05-30 Helen V. Gomonay , Roman Kunitsyn , Vadim M. Loktev

Topological magnon insulators in insulating Kagom\'e ferromagnets have been extensively studied in a series of papers. It has been established that Dzyaloshinskii-Moriya interaction (DMI) is the key ingredient to observe a nontrivial…

强关联电子 · 物理学 2016-11-22 S. A. Owerre

Materials with no net magnetization are generally not magneto-optically active. While this is individually true for a collinear antiferromagnet (AFM) and a topological insulator (TI), it is shown here that the magneto-optic Kerr effect…

介观与纳米尺度物理 · 物理学 2021-07-21 Amrit De , Tonmoy K. Bhowmick , Roger Lake

The phase of the quantum-mechanical wave function can encode a topological structure with wide-ranging physical consequences, such as anomalous transport effects and the existence of edge states robust against perturbations. While this has…

There have been intensive studies on Kitaev materials for the sake of the realization of exotic states such as quantum spin liquid and topological orders. In realistic materials, the Kitaev interaction may coexist with the…

强关联电子 · 物理学 2023-02-22 Kangkang Li

Investigating exotic magnetic materials with spintronic techniques is effective at advancing magnetism as well as spintronics. In this work, we report unusual field-induced suppression of the spin-Seebeck effect (SSE) in a quasi…

强关联电子 · 物理学 2019-10-02 Daichi Hirobe , Masahiro Sato , Masato Hagihala , Yuki Shiomi , Takatsugu Masuda , Eiji Saitoh

The spin Seebeck effect (SSE) in ferrimagnetic insulators (FMI) provides a simple method of using heat to manipulate magnons, which could be used as carriers of information and energy conversion. However, a theory that can quantitively…