Can I read Spin cluster operator theory for the Kagome lattice antiferromagnet on EtoBox?

Spin cluster operator theory for the Kagome lattice antiferromagnet by Hwang, Kyusung; Kim, Yong Baek; Yu, Jaejun; Park, Kwon is a scholarly article available to read on EtoBox.

What is Spin cluster operator theory for the Kagome lattice antiferromagnet about?

The spin-1/2 quantum antiferromagnet on the Kagome lattice provides a quintessential example in the strongly correlated electron physics where both effects of geometric frustration and quantum fluctuation are pushed to their limit. Among possible non-magnetic ground states, the valence bond solid (VBS) with a 36-site unit cell is one of the most promising candidates. A natural theoretical framework for the analysis of such VBS order is to consider quantum states on a bond connecting the nearest-neighboring sites as fundamental quantum modes of the system and treat them as effectively independent "bond particles." While correctly describing the VBS order in the ground state, this approach, known as the bond operator theory, significantly overestimates the lowest spin excitation energy. To overcome this problem, we take a next logical step in this paper to improve the bond operator theory and consider extended spin clusters as fundamental building blocks of the system. Depending on two possible configurations of the VBS order, various spin clusters are considered: (i) in the VBS order with staggered hexagonal resonance, we consider one spin cluster for a David star and two spin clust

Author

Hwang, Kyusung; Kim, Yong Baek; Yu, Jaejun; Park, Kwon

Published

2011

Language

EN