ELFT HÍRADÓ

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

SZFI SeminarAnton PershinWigner RCP SZFIUnveiling the Intricate Relationship 
between the Environment and the Properties of Defect Qubits and Organic 
Emitters - Habilitációs előadásTuesday, 27 June 2023, 10:00, KFKI Campus, 
Bldg. 1, 2nd floor, Conference RoomEnvironmental control provides a great 
opportunity to tailor the properties of defect qubits and molecular emitters. 
In this talk, my aim is to illustrate the importance of considering the 
environment in which materials are embedded when designing functional devices 
for quantum sensing and optoelectronics. Firstly, the impact of surface and 
interfacial band bending on the coherence time of nitrogen-vacancy (NV) 
centers in diamond will be discussed. It will be shown that modifying the 
surface properties can alter the stability of the defect along with the 
magnetic and electric noises inside the diamond. This allows for new 
applications of the NV center in quantum sensing, such as operation at 
ultra-low temperature [1], detection of diamagnetic electrolytes [2], and 
sensing distant nuclear spins. Secondly, the effect of the environment on the 
efficiency of organic light-emitting diodes will be emphasized [3]. Finally, 
the focus will be on the molecules and defects where the standard density 
functional theory calculations fail to accurately capture the excited state 
properties [4]. Instead, an approach to calculate the excitation energies 
with high-accuracy post-Hartree-Fock methods in these extended systems will 
be presented.[1] Neethirajan et al. Nano Lett. 2023, 23, 7, 2563–2569[2] 
Freire-Moschovitis et al. ACS Nano 2023, 17, 11, 10474–10485[3] Gillett et 
al. Nature Materials, 2022, 21[4] Pershin et al. Nature Communications, 2019, 
10 (1), 597  Minden érdeklődőt szívesen látunk! - Everyone is welcome to 
attend.Attila Nagysem-admin AT szfki.hu