Nematic, vector-multipole, and plateau-liquid states in the classical O3 pyrochlore antiferromagnet with biquadratic interactions in applied magnetic field - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




Nematic, vector-multipole, and plateau-liquid states in the classical O3 pyrochlore antiferromagnet with biquadratic interactions in applied magnetic field - Condensed Matter > Strongly Correlated Electrons - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: The classical bilinear-biquadratic nearest-neighbor Heisenbergantiferromagnet on the pyrochlore lattice does not exhibit conventionalNeel-type magnetic order at any temperature or magnetic field. Instead spincorrelations decay algebraically over length scales r ~ \sqrt{T}, behaviorcharacteristic of a Coulomb phase arising from a strong local constraint.Despite this, its thermodynamic properties remain largely unchanged if Neelorder is restored by the addition of a degeneracy-lifting perturbation, e.g.,further neighbor interactions. Here we show how these apparent contradictionscan be resolved by a proper understanding of way in which long-range Neel orderemerges out of well-formed local correlations, and identify nematic andvector-multipole orders hidden in the different Coulomb phases of the model. Sofar as experiment is concerned, our results suggest that where long rangeinteractions are unimportant, the magnetic properties of Cr spinels whichexhibit half-magnetization plateaux may be largely independent of the type ofmagnetic order present.



Autor: Nic Shannon, Karlo Penc, Yukitoshi Motome

Fuente: https://arxiv.org/



DESCARGAR PDF




Documentos relacionados