témavezető: Penc Karlo
belső konzulens: Asbóth János
helyszín (magyar oldal): Wigner Research Centre for Physics (WIGNER FK) helyszín rövidítés: BME
A kutatási téma leírása:
Generally, the magnetic moment order in Mott insulators and a phase that breaks the time-reversal symmetry appears. However, there are theoretical proposals for time reversal invariant phases where the order parameter breaks the O(3) symmetry in the spin space. These are spin-nematic or spin quadrupolar phases. This may occur when both ferromagnetic and antiferromagnetic exchanges are present in a model, together with frustration, which leads to the formation of bound pairs of magnon excitations. The condensation of these bound pairs is then the spin-nematic phase.
Using analytical and numerical methods, we will study the appearance of the bound pairs close to the ferromagnetic boundary in the triangular and face-centered cubic lattices and whether they can lead to nematic/quadrupolar phases for spin-1/2 and spin-1 systems.
előírt nyelvtudás: angol további elvárások: The application of a student with good knowledge of math methods like group theory, linear algebra, quantum mechanics, numerical methods, and, most importantly, enthusiasm and interest in pursuing a challenging but rewarding problem is encouraged.
felvehető hallgatók száma: 1
Jelentkezési határidő: 2024-05-31
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).