We warmly invite you to participate to our series of scientific seminars organised by the User Office at MAX IV.
Where – online through Zoom (https://lu-se.zoom.us/j/61349123545) and on-site when speaker is present at MAX IV
When – Mondays (Bi-weekly) 13:45 CET
Format – 30 minutes of presentation followed by 15 minutes of discussion, chaired by MAX IV staff
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The initiative aims to share knowledge and stimulate enthusiastic discussions on synchrotron research and methods developed at MAX IV. These shall be a channel to learn more about our facility, strengthen collaborations, bring communities together and promote cooperation and interdisciplinarity.
The speakers are MAX IV past, current and potential future users, as well as MAX IV staff; on the other hand, welcome attendees are members of the broad scientific community: scientists from the speaker´s home institution, of Swedish and international universities as well as MAX IV and other light sources staff.
Please reach us through the email of the in case you have any comments or suggestions regarding the series.
We look forward to seeing you online and hope you enjoy the talks, see the programme for 2023 below:
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
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