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2022 | OriginalPaper | Chapter

5. Spin Dynamics in Low-Symmetry Transition Metal Dichalcogenides

Author : Dr. Marc Vila Tusell

Published in: Spin Dynamics in Two-Dimensional Quantum Materials

Publisher: Springer International Publishing

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Abstract

This chapter devotes to the spin dynamics of MoTe\(_2\) and WTe\(_2\), namely, spin relaxation, spin Hall effect (SHE) and quantum spin Hall effect (QSHE). The first two phenomena will be studied for MoTe\(_2\) given the recent experimental findings concerning unconventional SHE and large spin diffusion lengths [3, 4]. On the other hand, since WTe\(_2\) has received more attention in the topic of QSHE [5‐11], our simulations of this effect will focus on WTe\(_2\).

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previous chapter Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport in Graphene

next chapter Conclusions and Outlook

In experiments, \(R_\mathrm {ISHE}\) also depends on the TMD’s electrical resistance (see Appendix E for details) and the Fermi level, as seen in Fig. 5.7. Interfacial barriers between graphene and the TMD can suppress the spin sink effect and cause a more distributed spin absorption across the TMD width, in which case the observed signal might be partially reduced.

Here, \(\boldsymbol{J}^{\alpha }_{s}=(J_{s,x}^\alpha , J_{s,y}^\alpha , J_{s,z}^\alpha )\), in contrast to the definition given in equation (2.10). See List of Acronyms and useful Symbols for the different definitions of the spin current.

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Title: Spin Dynamics in Low-Symmetry Transition Metal Dichalcogenides
Author: Dr. Marc Vila Tusell
Publisher: Springer International Publishing
Book: Spin Dynamics in Two-Dimensional Quantum Materials
Print ISBN: 978-3-030-86113-1

Electronic ISBN: 978-3-030-86114-8

Copyright Year: 2022
DOI: https://doi.org/10.1007/978-3-030-86114-8_5

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