Results 81 to 90 of about 128,254 (319)

Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge

Advanced Functional Materials, EarlyView.
Fe3Ge, a Kagome‐lattice magnet, exhibits remarkable anomalous Hall and Nernst effects, with transverse thermoelectric conductivity surpassing or comaprable to some well‐known ferromagnets. First‐principles calculations attribute these to Berry curvature from massive Dirac gaps. Additionally, topological Hall and Nernst signals emerge from field‐induced
Chunqiang Xu, Shuvankar Gupta, Hengxin Tan, Hyeonhu Bae, Olajumoke Oluwatobiloba Emmanuel, Mingyu Xu, Yan Wu, Xiaofeng Xu, Pengpeng Zhang, Weiwei Xie, Binghai Yan, Xianglin Ke   +11 more
wiley   +1 more source

Ultrafast extrinsic spin-Hall currents

, 2006
We consider the possibility of ultrafast extrinsic spin-Hall currents, generated by skew scattering following the optical injection of charge or pure spin currents. We propose a phenomenological model for this effect in quantum well structures.
Abakumov, Ali Najmaie, Ando, Arthur L. Smirl, Bakun, Bhat, Bhat, Bychkov, Duc, Dyakonov, Dyakonov, E.Ya. Sherman, Engel, H.M. van Driel, Hankiewicz, Hirsch, Huang, Hübner, J.E. Sipe, Kato, Mishchenko, Murakami, Najmaie, Najmaie, Najmaie, Nozieres, Rashba, Rashba, Rashba, Sherman, Sih, Sinova, Stevens, Stevens, Stevens, van Driel, Wunderlich, Zhao, Zhao   +38 more
core   +1 more source

Quantum Hall ferromagnetism in graphene: a SU(4) bosonization approach [PDF]

, 2007
We study the quantum Hall effect in graphene at filling factors \nu = 0 and \nu = \pm, concentrating on the quantum Hall ferromagnetic regime, within a non-perturbative bosonization formalism.
Doretto, R. L., Smith, C. Morais
core   +3 more sources

Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide

Advanced Functional Materials, EarlyView.
The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda, Jorge Cardenas‐Gamboa, Ding Pei, François Bertran, Leila Noohinejad, Snehashish Chatterjee, Changjiang Yi, Iñigo Robredo, Horst Borrmann, Maia G. Vergniory, Chandra Shekhar, Claudia Felser   +11 more
wiley   +1 more source

Fermi Surface Nesting and Anomalous Hall Effect in Magnetically Frustrated Mn2PdIn

Advanced Functional Materials, EarlyView.
Mn2PdIn, a frustrated inverse Heusler alloy, showing electronic‐structure driven anomalous Hall effect with Weyl crossings, Fermi‐surface nesting and near‐zero magnetization ideal for low‐magnetization spintronics. Abstract Noncollinear magnets with near‐zero net magnetization and nontrivial bulk electronic topology hold significant promise for ...
Afsar Ahmed, Arnab Bhattacharya, Prashant Singh, Ajay Kumar, Tukai Singha, Anis Biswas, Yaroslav Mudryk, I. Das   +7 more
wiley   +1 more source

Realization of monolayer ZrTe5 topological insulators with wide band gaps

Nature Communications
Two-dimensional topological insulators hosting the quantum spin Hall effect have application potential in dissipationless electronics. To observe the quantum spin Hall effect at elevated temperatures, a wide band gap is indispensable to efficiently ...
Yong-Jie Xu, Guohua Cao, Qi-Yuan Li, Cheng-Long Xue, Wei-Min Zhao, Qi-Wei Wang, Li-Guo Dou, Xuan Du, Yu-Xin Meng, Yuan-Kun Wang, Yu-Hang Gao, Zhen-Yu Jia, Wei Li, Lianlian Ji, Fang-Sen Li, Zhenyu Zhang, Ping Cui, Dingyu Xing, Shao-Chun Li   +18 more
doaj   +1 more source

Majorana chiral spin liquid in a model for Mott insulating cuprates

Physical Review Research, 2022
The large thermal Hall conductivity recently detected in Mott insulating cuprates has been attributed to chiral neutral spin excitations. A quantum spin liquid (QSL) with Majorana excitations, Chern number ±4 and large thermal Hall conductivity is found ...
Jaime Merino, Arnaud Ralko
doaj   +1 more source

Cyclotron Dynamics of a Kondo Singlet in a Spin-Orbit-Coupled Alkaline-Earth Atomic Gas

, 2014
We propose a scheme to investigate the interplay between Kondo-exchange interaction and quantum spin Hall effect with ultracold fermionic alkaline-earth atoms trapped in two-dimensional optical lattices using ultracold collision and laser-assisted ...
Du, Juan, Jiang, Bo-Nan, Lv, Hao, Qian, Jun, Wang, Yu-Zhu, Wen-LiWang   +5 more
core   +1 more source

Quasi-spin-charge separation and the spin quantum Hall effect [PDF]

Physical Review B, 2001
We use quantum field theory methods to study the network model for the spin quantum hall transition. When the couplings are fine tuned in a certain way, the spin and charge degrees of freedom, corresponding to the supercurrent algebras su(2) and osp(2|2) respectively, decouple in the renormalization group flow.
Leclair, A., Bernard, Denis
openaire   +2 more sources

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source