Article
Optics
Xiang Zhou, Yiping Ding, Qinxin Yue, Shangling He, Yingji He, Dongmei Deng
Summary: The study investigates the tunable spin Hall effect of light on the surface of topological insulators under the influence of an external magnetic field, revealing that the shift of the effect is determined by the dissipative and reactive components of the insulators' optical conductivity. The shifts are insensitive to the magnetic field and Fermi energy at high frequencies but sensitive to them at low frequencies, with potential applications in determining these properties using the SHEL shifts.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Peng Li, Jinjun Ding, Steven S-L Zhang, James Kally, Timothy Pillsbury, Olle G. Heinonen, Gaurab Rimal, Chong Bi, August DeMann, Stuart B. Field, Weigang Wang, Jinke Tang, Jidong Samuel Jiang, Axel Hoffmann, Nitin Samarth, Mingzhong Wu
Summary: This study reports a genuine topological Hall effect in a TI/MI structure, where the contribution of skyrmions to the Hall effect outweighs the coexistence of magnetic phases.
Article
Materials Science, Multidisciplinary
Amir N. Zarezad, Jozef Barnas, Alireza Qaiumzadeh, Anna Dyrdal
Summary: In this study, the effect of spin-momentum locking inhomogeneity on the planar Hall effect in topological insulators (TIs) is investigated. The planar Hall conductivity (PHC) in the TIs is derived using a minimal model and semiclassical Boltzmann formalism. It is found that the total PHC consists of linear and nonlinear components, with the nonlinear term exhibiting bilinear behavior and changing sign under certain conditions. The emergence of this nonlinear planar Hall effect is attributed to the spin-momentum locking inhomogeneity in the TIs.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Physics, Multidisciplinary
Zhejunyu Jin, Xianglong Yao, Zhenyu Wang, H. Y. Yuan, Zhaozhuo Zeng, Weiwei Wang, Yunshan Cao, Peng Yan
Summary: It has been discovered that hidden nonlinear magnon transport in magnetic textures can generate fictitious magnetic fields. By analyzing the scattering features between magnons and skyrmions, a significant Hall angle in both confluence and splitting modes has been predicted, and it has been found that the Hall angle reverses its sign when switching the handedness of the incident magnons. This finding may open up new possibilities for probing gauge fields through nonlinear means.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Condensed Matter
Matthias Goette, Thomas Dahm
Summary: Determining the detailed spin texture of topological surface states is crucial for spintronic applications. A method utilizing spin Hall effect tunneling spectroscopy is suggested to measure the out-of-plane spin component. An analytical formula for extracting the out-of-plane spin component is derived and tested with tight-binding models, showing good agreement with actual spin polarization.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Federico Binda, Stefano Fedel, Santos Francisco Alvarado, Paul Noel, Pietro Gambardella
Summary: The study investigates the spin-orbit torques (SOTs) and spin Hall magnetoresistance generated by Bi0.9Sb0.1(0001) when coupled with FeCo, confirming its effectiveness as a spin-injector material. The research finds that charge-to-spin conversion in single-crystal Bi0.9Sb0.1(0001) is isotropic despite the strong anisotropy of the topological surface states. Additionally, the damping-like SOT displays non-monotonic temperature dependence, with a minimum occurring at 20 K.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Pei Zhao, Qiang Wang, Yan Liang
Summary: This study demonstrates the coexistence of intrinsic ferroelectric and topological properties in two-dimensional In2TeS2. The spin of chiral edge states can be flipped by reversing the direction of ferroelectric polarization in single-layer In2TeS2. In In2TeS2 homobilayers, the topological properties are stacking-dependent, and the ferroelectric order can induce topological phase transition between trivial and nontrivial states.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xin-Yi Tang, Zhe Li, Feng Xue, Pengfei Ji, Zetao Zhang, Xiao Feng, Yong Xu, Quansheng Wu, Ke He
Summary: By using first-principles calculations, the magnetic and topological properties of XYBi2Te5 compounds (X, Y = Mn, Ni, V, Eu) were studied. The results show that these compounds have high magnetic ordering temperatures and nontrivial topological properties, with NiVBi2Te5 showing practical application potential.
Article
Quantum Science & Technology
Arthur Leis, Michael Schleenvoigt, Vasily Cherepanov, Felix Luepke, Peter Schueffelgen, Gregor Mussler, Detlev Gruetzmacher, Bert Voigtlaender, F. Stefan Tautz
Summary: This study investigated the transport properties of (Bi0.16Sb0.84)2Te3 films across a quantum phase transition, revealing an exponential drop in conductivity below the critical thickness, indicating the presence of spin-conserving backscattering.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Chemistry, Physical
Guojian Qian, Mengzhu Shi, Hui Chen, Shiyu Zhu, Jiawei Hu, Zihao Huang, Yuan Huang, Xian-Hui Chen, Hong-Jun Gao
Summary: In this study, we observed the correlation between surface impurity states and antiferromagnetic ground states in the antiferromagnetic topological insulators MnBi2Te4. The effect of magnetic field on the energy and local density of states of surface bound states was investigated, providing insights into the interplay between magnetic order and topological phases in magnetic topological materials.
Article
Materials Science, Multidisciplinary
Junpeng Hou, Ya-Jie Wu, Chuanwei Zhang
Summary: The study investigates topological phase transitions driven by non-Hermiticity, showing that transitions from trivial to quantum spin Hall (QSH) insulators can be induced by varying non-Hermitian terms, and exceptional edge arcs exist in QSH phases. Two topological invariants are established for characterizing the non-Hermitian phase transitions, providing a powerful tool for exploring novel non-Hermitian topological matter and their device applications beyond Chern classes.
Article
Chemistry, Multidisciplinary
Fangxue Luo, Xiamin Hao, Yizhen Jia, Junjie Yao, Qingling Meng, Shuwei Zhai, Jinge Wu, Wenzhen Dou, Miao Zhou
Summary: The article discusses the chemical functionalization process of jacutingaite, transitioning from a QSH state to a QAH state. Through calculations and simulations, it was found that 2D halogenated jacutingaite exhibits ferromagnetism and a QAH effect, showing promise for achieving exotic topological phases.
Article
Materials Science, Multidisciplinary
Oleksii Maistrenko, Benedikt Scharf, Dirk Manske, Ewelina M. Hankiewicz
Summary: The study reveals that uniform magnetization in three-dimensional topological insulator Josephson junctions can induce asymmetry in the Andreev spectrum, leading to Majorana modes and the Josephson Hall effect. Magnetic control and gating can enable significant Josephson Hall currents compared to longitudinal currents.
Article
Materials Science, Multidisciplinary
Ding-Fu Shao, Shu-Hui Zhang, Rui-Chun Xiao, Zi-An Wang, W. J. Lu, Y. P. Sun, Evgeny Y. Tsymbal
Summary: In this study, we demonstrate the realization of a spin-neutral tunneling anomalous Hall effect (TAHE) in an antiferromagnetic (AFM) tunnel junction driven by spin-neutral currents. We show that the symmetry mismatch between the AFM electrode and the nonmagnetic barrier with strong spin-orbit coupling (SOC) results in spin-dependent momentum filtering, generating transverse Hall currents in each electrode. This finding opens up new possibilities for research in magnetoelectronics and spintronics.
Article
Materials Science, Multidisciplinary
Antu Laha, Ratnadwip Singha, Sougata Mardanya, Bahadur Singh, Amit Agarwal, Prabhat Mandal, Z. Hossain
Summary: This study reports a large topological Hall effect in single crystals of EuAgAs, an antiferromagnetic (AFM) Dirac semimetal with a weak ferromagnetic component. Experimental observations show that EuAgAs is an AFM Dirac semimetal with a Weyl fermion state, which can be realized under an applied magnetic field by breaking time-reversal symmetry.
Article
Physics, Multidisciplinary
Tong Zhou, Matthieu C. Dartiailh, William Mayer, Jong E. Han, Alex Matos-Abiague, Javad Shabani, Igor Zutic
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Gaofeng Xu, Tong Zhou, Benedikt Scharf, Igor Zutic
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Applied
M. D. Randle, A. Lipatov, I Mansaray, J. E. Han, A. Sinitskii, J. P. Bird
Summary: CDW was first suggested by Peierls to describe concepts related to electron-phonon or electron-electron interactions in condensed matter physics. Recent studies have shown that semiconducting systems like TiS3 may exhibit behavior related to CDWs, with the exact origin of this behavior requiring further measurements for proper characterization.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
M. D. Randle, A. Lipatov, A. Datta, A. Kumar, I. Mansaray, A. Sinitskii, U. Singisetti, J. E. Han, J. P. Bird
Summary: We investigate the behavior of metal-insulator transition in TiS3 nanowire field-effect transistors under strongly nonequilibrium conditions. We observe the emergence of a critical fixed point that separates insulating and metallic regions in the device's transfer curves. The critical gate voltage defining this fixed point changes systematically with the drain bias, allowing us to map out a phase diagram. The field-induced metal-insulator transition in TiS3 can occur over a wide range of temperatures, depending on the choice of gate voltage used to tune the carrier concentration.
APPLIED PHYSICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Jaydeep Joshi, Benedikt Scharf, Igor Mazin, Sergiy Krylyuk, Daniel J. Campbell, Johnpierre Paglione, Albert Davydov, Igor Zutic, Patrick M. Vora
Summary: Interfaces in layered heterostructures provide a fertile ground for exploring new physics. This article investigates an unexpected photoluminescence peak at the interface between TiSe2 and MoSe2, which disappears at the charge density wave transition. The results present a challenge for theoretical understanding and offer a fascinating avenue for engineering excitons through interactions with charge density waves.
Article
Multidisciplinary Sciences
Tong Zhou, Matthieu C. Dartiailh, Kasra Sardashti, Jong E. Han, Alex Matos-Abiague, Javad Shabani, Igor Zutic
Summary: This study proposes a method to realize the fusion of MBS and demonstrate their non-Abelian statistics in mini-gate controlled planar Josephson junctions. The feasibility of preparing, manipulating, and fusing MBS in 2D systems is supported by experimental results. This research provides insights into the understanding and further study of MBS.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
R. Stuehler, A. Kowalewski, F. Reis, D. Jungblut, F. Dominguez, B. Scharf, G. Li, J. Schaefer, E. M. Hankiewicz, R. Claessen
Summary: In this study, the authors demonstrate that topological protection can be lifted by pairwise coupling of 2D TI edges in close proximity. This finding opens up new possibilities for active control of topological protection through inter-edge hybridization.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Fernando Dominguez, Benedikt Scharf, Ewelina M. Hankiewicz
Summary: We investigate an unconventional topological phase transition in quantum spin Hall systems under a magnetic field, revealing a stable topological gap separated phase called crystalline Weyl semimetal between the QSH and trivial insulator phases. We predict that this phase transition is visible in materials described by the Kane and Mele model even with significant particle-hole symmetry breaking.
SCIPOST PHYSICS CORE
(2022)
Article
Materials Science, Multidisciplinary
Alexander G. Bauer, Benedikt Scharf, Laurens W. Molenkamp, Ewelina M. Hankiewicz, Bjorn Sothmann
Summary: Coherent heat transport is a powerful tool to probe Majorana physics in topological Josephson junctions, where the thermal conductance transverse to the superconducting phase bias is universally quantized by half at phase difference phi = pi. The existence of Majorana modes in topological Josephson junctions can be strongly supported by thermal transport.
Article
Physics, Multidisciplinary
Benedikt Scharf, Alessandro Braggio, Elia Strambini, Francesco Giazotto, Ewelina M. Hankiewicz
Summary: In this study, the thermodynamic properties of topological Josephson junctions were investigated using a QSH insulator-based junction as an example. It was proposed that phase-dependent measurements of heat capacity could be used to demonstrate topological features and distinguish between topological and trivial junctions. The results showed a pronounced double-peak feature in the heat capacity's phase dependence, with the 4pi periodicity observed in the superconducting phase difference at short time scales.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Oleksii Maistrenko, Benedikt Scharf, Dirk Manske, Ewelina M. Hankiewicz
Summary: The study reveals that uniform magnetization in three-dimensional topological insulator Josephson junctions can induce asymmetry in the Andreev spectrum, leading to Majorana modes and the Josephson Hall effect. Magnetic control and gating can enable significant Josephson Hall currents compared to longitudinal currents.
Article
Physics, Multidisciplinary
Benedikt Scharf, Alessandro Braggio, Elia Strambini, Francesco Giazotto, Ewelina M. Hankiewicz
COMMUNICATIONS PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Chenghao Shen, Timothy Leeney, Alex Matos-Abiague, Benedikt Scharf, Jong E. Han, Igor Zutic
Article
Materials Science, Multidisciplinary
Thomas Vezin, Chenghao Shen, Jong E. Han, Igor Zutic
Article
Physics, Multidisciplinary
Joseph D. Pakizer, Benedikt Scharf, Alex Matos-Abiague
Summary: This theoretical study investigates the crystalline anisotropy of topological phase transitions in phase-controlled planar Josephson junctions subject to spin-orbit coupling and in-plane magnetic fields. The interplay between the magnetic field and the orientation of the junction with respect to its crystallographic axes can be used to electrically tune between different symmetry classes, optimizing the stability and localization of Majorana bound states. These findings provide guidance for engineering topological superconductivity in planar JJs, especially for setups containing noncollinear junctions proposed for braiding operations on multiple Majorana pairs.
PHYSICAL REVIEW RESEARCH
(2021)
