Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-03-22
Europhys. Lett. 92 (2010) 37001
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, final version
Scientific paper
Competing ferro- and antiferromagnetic exchange interactions may lead to the formation of bound magnon pairs in the high-field phase of a frustrated quantum magnet. With decreasing field, magnon pairs undergo a Bose-condensation prior to the onset of a conventional one-magnon instability. We develop an analytical approach to study the zero-temperature properties of the magnon-pair condensate, which is a bosonic analog of the BCS superconductors. Representation of the condensate wave-function in terms of the coherent bosonic states reveals the spin-nematic symmetry of the ground-state and allows one to calculate various static properties. Sharp quasiparticle excitations are found in the nematic state with a small finite gap. We also predict the existence of a long-range ordered spin-nematic phase in the frustrated chain material LiCuVO4 at high fields.
Tsunetsugu Hirokazu
Zhitomirsky Michael E.
No associations
LandOfFree
Magnon pairing in quantum spin nematic does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnon pairing in quantum spin nematic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnon pairing in quantum spin nematic will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-206174