ELFT HÍRADÓ

[Szeminárium koordinátor <sem-admin AT szfki.hu>]

SZFI SeminarOroszlány LászlóEötvös Loránd Tudományegyetem (host: Kiss 
Tamás)Electrically driven singlet-triplet transition in triangulene spin-1 
chainsTuesday, 9 May 2023, 10:00, KFKI Campus, Bldg. 1, 2nd floor, Conference 
RoomRecently, graphene triangulene chains have been synthesized, and their 
magnetic response has been analyzed by scanning tunneling microscopy methods 
by Mishra et al. [Nature (London) 598, 287 (2021)]. Motivated by this study, 
we determine the exchange bilinear and biquadratic constants of the 
triangulene chains by calculating two-spin rotations in the spirit of the 
magnetic force theorem. We then analyze open-ended, odd-numbered chains, 
whose edge states pair up forming a triplet ground state. We propose three 
experimental approaches that enable us to trigger and control a 
singlet-triplet spin transition. Two of these methods are based on applying a 
mechanical distortion to the chain. We finally show that the transition can 
be controlled efficiently by the application of an electric 
field. Minden érdeklődőt szívesen látunk! - Everyone is welcome to 
attend.Attila Nagysem-admin AT szfki.hu