SCIENTÍFika series

Scientífika 29 May 2023, 13:45 - 14:30

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

Controlling valley spin splittings in V1/3NbS2

Speaker:  Phil King – School of Physics and Astronomy, University of St Andrews

Associated beamline: Bloch


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.

Manchon et al., Nature Materials 14 (2015) 871

Xu et al., Nature Physics 10 (2014) 343

Edwards et al., Nature Materials 22 (2023) 459

*Read more about this seminar.