ELFT HÍRADÓ

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

SZFI SeminarHagymási ImreHelmholtz-Zentrum Berlin, Wigner FKFinite and 
zero-temperature properties of the quantum Heisenberg antiferromagnet on the 
pyrochlore lattice - Habilitációs előadásTuesday, 20 June 2023, 10:00, KFKI 
Campus, Bldg. 1, 2nd floor, Conference RoomIn the low-temperature behaviour 
of quantum systems, we often encounter symmetry breaking and magnetic 
ordering. In contrast, the fluctuations in many frustrated systems can be so 
strong that they prevent the onset of magnetic ordering and new, exotic 
phases of the matter can emerge like quantum spin liquids.The S=1/2 
antiferromagnetic Heisenberg model on the pyrochlore lattice, which is a 
cubic arrangement of corner-sharing tetrahedra, is one of the most famous 
systems in this field. Despite several decades’ investigations, the 
properties of the quantum model remain inconclusive due to the lack of 
reliable theoretical tools.In this talk, I will give an overview of my 
research activities in this area. I am going to show that with the help of 
large-scale density-matrix renormalization group and numerical linked-cluster 
expansion significant steps can be made towards the understanding the 
thermodynamics and ground-state properties of this difficult problem. The 
experimental relevance of the results and future research directions will be 
discussed as well.  Minden érdeklődőt szívesen látunk! - Everyone is 
welcome to attend.Attila Nagysem-admin AT szfki.hu