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Discovery of topological Weyl semimetals has revealed the opportunities to realize several extraordinary physical phenomena in condensed matter physics. Specifically, these semimetals with strong spin-orbit coupling, broken inversion…

Mesoscale and Nanoscale Physics · Physics 2020-03-18 Bing Zhao , Dmitrii Khokhriakov , Yang Zhang , Huixia Fu , Bogdan Karpiak , Anamul Md. Hoque , Xiaoguang Xu , Yong Jiang , Binghai Yan , Saroj P. Dash

Topological quantum materials (TQMs) possess abundant and attractive spin physics, and a Weyl semimetal is the representative material because of the generation of spin polarization that is available for spin devices due to fictitious Weyl…

Mesoscale and Nanoscale Physics · Physics 2022-09-28 Kosuke Ohnishi , Motomi Aoki , Ryo Ohshima , Ei Shigematsu , Yuichiro Ando , Taishi Takenobu , Masashi Shiraishi

The efficient generation and control of spin polarization via charge-spin conversion in topological semimetals are desirable for future spintronic and quantum technologies. Here, we report the charge-spin conversion (CSC) signals measured…

Mesoscale and Nanoscale Physics · Physics 2021-02-03 Bing Zhao , Anamul Md. Hoque , Dmitrii Khokhriakov , Bogdan Karpiak , Saroj P. Dash

Quantum materials with a large charge current-induced spin polarization are promising for next-generation all-electrical spintronic science and technology. Van der Waals metals with high spin-orbit coupling and novel spin textures have…

Mesoscale and Nanoscale Physics · Physics 2022-12-28 Anamul Md. Hoque , Bing Zhao , Dmitrii Khokhriakov , Prasanta Muduli , Saroj P. Dash1

Weyl semimetal Td-phase WTe2 possesses the spin-resolved band structure with strong spin-orbit coupling, holding promises as a useful spin source material. The noncentrosymmetric crystalline structure of Td-WTe2 endows the generation of the…

The proximity of a transition metal dichalcogenide (TMD) to graphene imprints a rich spin texture in graphene and complements its high quality charge/spin transport by inducing spin-orbit coupling (SOC). Rashba and valley-Zeeman SOCs are…

Mesoscale and Nanoscale Physics · Physics 2019-08-22 Talieh S. Ghiasi , Alexey A. Kaverzin , Patrick J. Blah , Bart J. van Wees

Weyl semimetals (WSMs) are a newly discovered class of quantum materials which can host a number of exotic bulk transport properties, such as the chiral magnetic effect, negative magneto-resistance, and the anomalous Hall effect. In this…

Mesoscale and Nanoscale Physics · Physics 2019-11-06 Steven S. -L. Zhang , Anton A. Burkov , Ivar Martin , Olle G. Heinonen

Efficient and versatile spin-to-charge current conversion is crucial for the development of spintronic applications, which strongly rely on the ability to electrically generate and detect spin currents. In this context, the spin Hall effect…

The charge-current-induced spin polarization is a key property of topological insulators for their applications in spintronics. However, topological surface states are expected to give rise to only one type of spin polarization for a given…

Ferroelectric materials hold great potential for alternative memories and computing, but several challenges need to be overcome before bringing the ideas to applications. In this context, the recently discovered link between electric…

Materials Science · Physics 2022-10-18 Homayoun Jafari , Arunesh Roy , Jagoda Sławińska

Since their discovery, topological insulators have been expected to be ideal spintronic materials owing to the spin currents carried by surface states with spin--momentum locking. However, the bulk doping problem remains an obstacle that…

Materials Science · Physics 2016-10-05 Yan Sun , Yang Zhang , Claudia Felser , Binghai Yan

We determine the band structure and spin texture of WTe2 by spin- and angle-resolved photoemission spectroscopy (SARPES). With the support of first-principles calculations, we reveal the existence of spin polarization of both the Fermi arc…

Topological materials with large spin-orbit coupling and immunity to disorder-induced symmetry breaking show great promise for efficiently converting charge to spin. Here, we report that long-range disordered sputtered WTex thin films…

Mesoscale and Nanoscale Physics · Physics 2021-04-21 Xiang Li , Peng Li , Vincent D. -H. Hou , Mahendra DC , Chih-Hung Nien , Fen Xue , Di Yi , Chong Bi , Chien-Min Lee , Shy-Jay Lin , Wilman Tsai , Yuri Suzuki , Shan X. Wang

In this paper we present spin-to-charge current conversion properties in the Weyl semimetal TaP by means of the inverse Rashba-Edelstein effect (IREE) with the integration of this quantum material with the ferromagnetic metal Permalloy…

Mesoscale and Nanoscale Physics · Physics 2023-02-09 J. B. S. Mendes , R. O. Cunha , S. O. Ferreira , R. D. dos Reis , M. Schmidt , M. Nicklas , S. M. Rezende , A. Azevedo

We report the observation of current-induced spin polarization, the Rashba-Edelstein effect (REE), and its Onsager reciprocal phenomenon, the spin galvanic effect (SGE), in a few-layer graphene/2H-TaS2 heterostructure at room temperature.…

Topological quantum materials, including topological insulators and superconductors, Dirac semimetals and Weyl semimetals, have attracted much attention recently for their unique electronic structure, spin texture and physical properties.…

The search for a material platform for topological quantum computation has recently focused on unconventional superconductors. Such material systems, where the superconducting order parameter breaks a symmetry of the crystal point group,…

We experimentally compare two types of interface structures with magnetic and non-magnetic Weyl semimetals. They are the junctions between a gold normal layer and magnetic Weyl semimetal Ti$_2$MnAl, and a ferromagnetic nickel layer and…

Mesoscale and Nanoscale Physics · Physics 2020-04-28 V. D. Esin , D. N. Borisenko , N. N. Kolesnikov , E. V. Deviatov

We propose a new topological quantum state of matter---the two-dimensional (2D) Weyl half semimetal (WHS), which features 2D Weyl points at Fermi level belonging to a single spin channel, such that the low-energy electrons are described by…

Materials Science · Physics 2019-08-28 Jing-Yang You , Cong Chen , Zhen Zhang , Xian-Lei Sheng , Shengyuan A. Yang , Gang Su

Topological semimetals have recently attracted great attention due to prospective applications governed by their peculiar Fermi surfaces. Weyl semimetals host chiral fermions that manifest as pairs of non-degenerate massless Weyl points in…

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