We warmly invite you to participate to our series of scientific seminars organised by the User Office at MAX IV.
Where – (Zoom) call-in
When – Mondays 13:45 CET
Format – 30 minutes of presentation followed by 15 minutes of discussion, chaired by MAX IV staff
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Next talk in the PROGRAMME:
Monday 29th May 2023, 13:45 CET – Onsite MAX III & Online – Zoom
Title: Controlling valley spin splittings in V1/3NbS2
Speaker: Phil King – School of Physics and Astronomy, University of St Andrews
Associated beamline: Bloch
Abstract:
Spin-orbit coupling can have a major effect on the electronic structures of solids.1 In the family of monolayer transition metal dichalcogenides (TMDs), it acts to couple the electron spin with a valley pseudospin, proposed to enable new applications in so-called “valleytronics”.2 The underlying valley–spin splittings can be tuned via the application of external magnetic fields, however, only modest changes are typically realised. Here, using microscopic-area spatially- and angle-resolved photoemission at Bloch@Max-IV, we show how much larger effects can be achieved by coupling surface layer states to intrinsic bulk magnetic order in the metal-intercalated TMD V1/3NbS2,3 demonstrating a valley-selective Ising coupling which reaches a comparable magnitude to the intrinsic spin–orbit splittings.
1 Manchon et al., Nature Materials 14 (2015) 871
2 Xu et al., Nature Physics 10 (2014) 343
3 Edwards et al., Nature Materials 22 (2023) 459