magnetic nanoclusters and dots; single-molecule magnets; quantum computing
Rančić Marko, Stepanenko Dimitrije (2017), Coherent manipulation of single electron spins with Landau-Zener sweeps, in Physical Review B
, 94, 241301.
Stojadinović Bojan, Dohčević-Mitrović Zorana, Stepanenko Dimitrije, Rosić Milena, Petronijević Milan, Tasić Nikola, Matović Branko, Stojanović Biljana (2017), Dielectric and ferroelectric properties of Ho-doped BiFeO3 nanopowders across the structural phase transition, in Ceramics International
, 43, 16531.
Milivojević Marko, Stepanenko Dimitrije (2017), Effective spin Hamiltonian of a gated triple quantum dot in the presence of spin–orbit interaction, in Journal of Physics: Condensed Matter
, 29, 405302.
Stepanenko Dimitrije, Trif Mircea, Tsyplyatyev Olexandr, Loss Daniel (2016), Field-dependent superradiant quantum phase transition of molecular magnets in microwave cavities, in Semiconductor Science and Technology
, 31, 094003.
Stojadinović Bojan, Vasić Borislav, Stepanenko Dimitrije, Tadić Nenad, Gajić Radoš, Dohčević-Mitrović Zorana (2016), Variation of electric properties across the grain boundaries in BiFeO3 film, in Journal of Physics D: Applied Physics
, 49(4), 045309-045309.
The only direct way to access a single spin in nonrelativistic limit is through magnetic fields. Control of spins at the nanoscale by applying pulses of electric fields is a matter of compromise. Electric fields are easier to apply to small samples and quickly switch on and off than the magnetic fields. Unfortunately, the spins do not couple directly to electric fields in the nonrelativistic limit. The coupling is always indirect, and it strongly depends on the material that carries spins. In this project, we are going to study spin-electric coupling in two new classes of nanoscale systems; single-molecule magnets and nanocrystaline grains, and develop control scheme for triple quantum dot spin qubitsOur goal for single-molecule magnets is to find the spin-based degrees of freedom that couple to electric fields, find the molecules that show strong spin-electric coupling, and work on quantum optics of a set of such molecules in a resonant cavity. For nanocrystalline grains, we are going to search for spin textures in low-energy states and for a way to flip them by electric fields. Achieving this goal could enable electrically controlled magnetic memories. For triple quantum dots, we are going to study control in the presence of spin-orbit interaction, and see if this interaction can be used as a resource for control of spins.Scientific goals are discovery of molecular magnets with strong spin-electric coupling and theoretic description of applications that use such molecules. In the area of nanocrystals, the goal is to understand how strong internal electric fields modify their spin states, and search for a way to influence these spin states with external electric fields.The collaboration is going to benefit the recipient country through exchange of ideas and experience in collaborative work that involves scientists of various specialties. Collaboration will help the students to start their carriers with work on the most important topics of contemporary physics and introduce them to a broad scope of methods that study them.