Spin multiplole moments as collective quantum phenomena

19th International School on Condensed Matter Physics: Advances in Nanostructured Condensed Matter: Research and Innovations

Georgiev, M.^1 ; Chamati, H.^1

Institute of Solid State Physics, Bulgarian Academy of Sciences, Tsarigradsko Chaussee 72, Sofia

1784, Bulgaria^1

关键词: Magnetic system;    Mixed spins;    Multipole moments;    Multipoles;    Quantum phenomena;    Spin cluster;    Spin liquids;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/794/1/012026/pdf
DOI  :  10.1088/1742-6596/794/1/012026

来源: IOP

【 摘 要 】

In this paper we investigate the occurrence of multipole moments of a collection of spins in a quantum magnetic system. To get insights into the behaviour of such systems we start by considering small spin clusters composed of dimers, trimers, as well as mixed spin systems with four spins. We focus our attention on the quantum multipole states, that gave rise to the widely discussed spin nematic and spin liquid phases. The magnetic properties of these systems are computed and the main differences between bosonic and fermionic multipolar states are discussed.