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Valley-spin coupling in transition-metal dichalcogenides (TMDs) can result in unusual spin transport behaviors under an external magnetic field. Nonlocal resistance measured from 2D materials such as TMDs via electrical Hanle experiments…

Materials Science · Physics 2017-05-24 K. Tian , Z. Yue , D. Magginetti , M. E. Raikh , A. Tiwari

The valence flat bands in transition metal dichalcogenide (TMD) heterobilayers are shown to exhibit strong intralayer spin-orbit coupling. This is reflected in a simple tight-binding model with spin-dependent complex hoppings based on the…

Mesoscale and Nanoscale Physics · Physics 2022-06-01 Louk Rademaker

The interplay of Ising spin-orbit coupling and non-trivial band topology in transition metal dichalcogenides (TMDs) produces anomalous transport and optical properties that are very different from a regular 2D electron gas. The…

Mesoscale and Nanoscale Physics · Physics 2024-02-20 Gargee Sharma , Sophia E. Economou , Edwin Barnes

We uncover two anomalous features in the nonlocal transport behavior of two-dimensional metallic materials with spin-orbit coupling. Firstly, the nonlocal resistance can have negative values and oscillate with distance, even in the absence…

Mesoscale and Nanoscale Physics · Physics 2017-10-04 Chunli Huang , Y. D Chong , Miguel A. Cazalilla

Monolayer (1L) transition metal dichalcogenides (TMDs) provide a unique opportunity to control the valley degree of freedom of optically excited charge carriers due to the spin-valley locking effect. Despite extensive studies of the…

We investigate proximity-induced superconductivity in monolayers of transition metal dichalcogenides (TMDs) in the presence of an externally generated exchange field. A variety of superconducting order parameters is found to emerge from the…

Superconductivity · Physics 2017-04-11 M. A. Rahimi , A. G. Moghaddam , C. Dykstra , M. Governale , U. Zülicke

We observe anisotropic Hanle lineshape with unequal in-plane and out-of-plane non-local signals for spin precession measurements carried out on lateral metallic spin valves with transparent interfaces. The conventional interpretation for…

Mesoscale and Nanoscale Physics · Physics 2017-02-09 K. S. Das , F. K. Dejene , B. J. van Wees , I. J. Vera-Marun

Since its discovery, graphene has been a promising material for spintronics: its low spin-orbit coupling, negligible hyperfine interaction, and high electron mobility are obvious advantages for transporting spin information over long…

Mesoscale and Nanoscale Physics · Physics 2018-12-04 Jose H. Garcia , Marc Vila , Aron W. Cummings , Stephan Roche

Transition metal dichalcogenides (TMDs) combine interesting optical and spintronic properties in an atomically-thin material, where the light polarization can be used to control the spin and valley degrees-of-freedom for the development of…

Mesoscale and Nanoscale Physics · Physics 2021-03-10 Carmem M. Gilardoni , Freddie Hendriks , Caspar H. van der Wal , Marcos H. D. Guimarães

Two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have been recently proposed as appealing candidate materials for spintronic applications owing to their distinctive atomic crystal structure and exotic physical properties…

Recent experiments have observed correlated insulating and possible superconducting phases in twisted homobilayer transition metal dichalcogenides (TMDs). Besides the spin-valley locked moire bands due to the intrinsic Ising spin-orbit…

Strongly Correlated Electrons · Physics 2021-12-01 Yi-Ting Hsu , Fengcheng Wu , S. Das Sarma

Motivated by recent observations of unconventional out-of-plane dampinglike torque in \ch{WTe2}/Permalloy bilayer systems, we calculate the spin-orbit torque generated in two-dimensional transition metal dichalcogenide (TMD)-ferromagnet…

Mesoscale and Nanoscale Physics · Physics 2020-07-07 Fei Xue , Christoph Rohmann , Junwen Li , Vivek Amin , Paul Haney

We study the quantum diffusive transport of multivalley massive Dirac cones, where time-reversal symmetry requires opposite spin orientations in inequivalent valleys. We show that the intervalley scattering and intravalley scattering can be…

Mesoscale and Nanoscale Physics · Physics 2013-01-09 Hai-Zhou Lu , Wang Yao , Di Xiao , Shun-Qing Shen

We investigate spin-polarized electron tunnelling through ensembles of nanometer scale Al grains embedded between two Co-reservoirs at 4.2K, and observe tunnelling-magnetoresistance (TMR) and effects from spin-precession in the…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 L. Y. Zhang , C. Y. Wang , Y. G. Wei , X. Y. Liu , D. Davidovic

Dynamics of charge-density fluctuations in a system of two tunnel-coupled wires contains two diffusion modes with dispersion iw=Dq^2 and iw =Dq^2+2/tau_t, where D is the diffusion coefficient and tau_t is the tunneling time between the…

Mesoscale and Nanoscale Physics · Physics 2015-06-22 R. C. Roundy , M. C. Prestgard , A. Tiwari , E. G. Mishchenko , M. E. Raikh

Monolayer transition metal dichalcogenides (TMDs) offer new opportunities for realizing quantum dots (QDs) in the ultimate two-dimensional (2D) limit. Given the rich control possibilities of electron valley pseudospin discovered in the…

Mesoscale and Nanoscale Physics · Physics 2014-10-24 Gui-Bin Liu , Hongliang Pang , Yugui Yao , Wang Yao

Electrical spin orientation is the generation of electron spin proportional to the electric current. This phenomenon is allowed by symmetry in gyrotropic systems, e.g. in inversion-asymmetric structures with Rashba spin-orbit splitting.…

Mesoscale and Nanoscale Physics · Physics 2024-10-07 L. E. Golub , E. L. Ivchenko

Quantum transport and spintronics regimes are studied in p- and n-doped atomic layers of hexagonal transition metal dichalcogenides (TMDCs), subject to the interplay between the valley structure and spin-orbit coupling. We find how spin…

Mesoscale and Nanoscale Physics · Physics 2014-12-23 Hector Ochoa , Francesca Finocchiaro , Francisco Guinea , Vladimir I. Fal'ko

Transition metal dichalcogenide (TMD) monolayers are interesting materials in part because of their strong spin-orbit coupling. This leads to intrinsic spin-splitting of opposite signs in opposite valleys, so the valleys are intrinsically…

Mesoscale and Nanoscale Physics · Physics 2018-11-21 Dibya Kanti Mukherjee , Arijit Kundu , H. A. Fertig

Monolayer transition metal dichalcogenides have emerged as prominent candidates to explore the complex interplay between the spin and the valleys degrees of freedom. The strong spin-orbit interaction and broken inversion symmetry within…

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