DC pole | Wartość | Język |
dc.contributor.author | Faria Junior, Paulo E. | - |
dc.contributor.author | Zollner, Klaus | - |
dc.contributor.author | Woźniak, Tomasz | - |
dc.contributor.author | Kurpas, Marcin | - |
dc.contributor.author | Gmitra, Martin | - |
dc.contributor.author | Fabian, Jaroslav | - |
dc.date.accessioned | 2022-08-12T11:34:54Z | - |
dc.date.available | 2022-08-12T11:34:54Z | - |
dc.date.issued | 2022 | - |
dc.identifier.citation | "New Journal of Physics" (2022), Vol. 24,art. no. 083004 | pl_PL |
dc.identifier.issn | 1367-2630 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/23763 | - |
dc.description.abstract | Transition metal dichalcogenides (TMDCs) are ideal candidates to explore the manifestation of
spin-valley physics under external stimuli. In this study, we investigate the influence of strain on
the spin and orbital angular momenta, effective g-factors, and Berry curvatures of several
monolayer TMDCs (Mo andWbased) using a full ab initio approach. At the K-valleys, we find a
surprising decrease of the conduction band spin expectation value for compressive strain,
consequently increasing the dipole strength of the dark exciton by more than one order of
magnitude (for ∼1%–2% strain variation).We also predict the behavior of direct excitons
g-factors under strain: tensile (compressive) strain increases (decreases) the absolute value of
g-factors. Strain variations of ∼1% modify the bright (A and B) excitons g-factors by ∼0.3(0.2)
forW(Mo) based compounds and the dark exciton g-factors by ∼0.5 (0.3) forW (Mo)
compounds. Our predictions could be directly visualized in magneto-optical experiments in
strained samples at low temperature. Additionally, our calculations strongly suggest that strain
effects are one of the possible causes of g-factor fluctuations observed experimentally. By
comparing the different TMDC compounds, we reveal the role of spin–orbit coupling (SOC): the
stronger the SOC, the more sensitive are the spin-valley features under applied strain.
Consequently, monolayerWSe2 is a formidable candidate to explore the role of strain on the
spin-valley physics.We complete our analysis by considering the side valleys, Γ and Q points, and
by investigating the influence of strain in the Berry curvature. In the broader context of valley- and
strain-tronics, our study provides fundamental microscopic insights into the role of strain in the
spin-valley physics of TMDCs, which are relevant to interpret experimental data in monolayer
TMDCs as well as TMDC-based van der Waals heterostructures. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | spin-valley | pl_PL |
dc.subject | valley Zeeman | pl_PL |
dc.subject | spin-mixing | pl_PL |
dc.subject | TMDC | pl_PL |
dc.subject | valleytronics | pl_PL |
dc.subject | straintronics | pl_PL |
dc.subject | strain | pl_PL |
dc.title | First-principles insights into the spin-valley physics of strained transition metal dichalcogenides monolayers | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.1088/1367-2630/ac7e21 | - |
Pojawia się w kolekcji: | Artykuły (WNŚiT)
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