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  Phonon-driven spin-Floquet magneto-valleytronics in MoS2

Shin, D., Hübener, H., de Giovannini, U., Jin, H., Rubio, A., & Park, N. (2018). Phonon-driven spin-Floquet magneto-valleytronics in MoS2. Nature Communications, 9(638): 638. doi:10.1038/s41467-018-02918-5.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0001-A9F2-F Version Permalink: https://hdl.handle.net/21.11116/0000-0006-D5B5-D
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 Creators:
Shin, D.1, Author
Hübener, H.2, 3, Author           
de Giovannini, U.2, 3, Author           
Jin, H.1, Author
Rubio, A.2, 3, 4, 5, Author           
Park, N.1, 2, 3, Author           
Affiliations:
1Department of Physics, Ulsan National Institute of Science and Technology, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Center for Free-Electron Laser Science, ou_persistent22              
4Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              
5Nano-Bio Spectroscopy Group, Departamento de Fisica de Materiales, Universidad del País Vasco UPV/EHU, ou_persistent22              

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 Abstract: Two-dimensional materials equipped with strong spin–orbit coupling can display novel electronic, spintronic, and topological properties originating from the breaking of time or inversion symmetry. A lot of interest has focused on the valley degrees of freedom that can be used to encode binary information. By performing ab initio time-dependent density functional simulation on MoS2, here we show that the spin is not only locked to the valley momenta but strongly coupled to the optical E″ phonon that lifts the lattice mirror symmetry. Once the phonon is pumped so as to break time-reversal symmetry, the resulting Floquet spectra of the phonon-dressed spins carry a net out-of-plane magnetization (≈0.024μB for single-phonon quantum) even though the original system is non-magnetic. This dichroic magnetic response of the valley states is general for all 2H semiconducting transition-metal dichalcogenides and can be probed and controlled by infrared coherent laser excitation.

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Language(s): eng - English
 Dates: 2017-08-252018-01-092018-02-12
 Publication Status: Published online
 Pages: -
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 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41467-018-02918-5
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Project name : We acknowledge the financial support from the European Research Council (ERC-2015-AdG-694097), European Union’s H2020 program under GA no. 676580 (NOMAD) and GA no. 646259 (MOSTOPHOS). D.S. and N.P. acknowledge the support from BRL (NRF-2017R1A4A101532).
Grant ID : 676580
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : We acknowledge the financial support from the European Research Council (ERC-2015-AdG-694097), European Union’s H2020 program under GA no. 676580 (NOMAD) and GA no. 646259 (MOSTOPHOS). D.S. and N.P. acknowledge the support from BRL (NRF-2017R1A4A101532).
Grant ID : 646259
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 9 (638) Sequence Number: 638 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723