1.
Phys Rev Lett
; 107(9): 097201, 2011 Aug 26.
Artículo
en Inglés
| MEDLINE
| ID: mdl-21929263
RESUMEN
A thermodynamic method to extract the interchain coupling (IC) of spatially anisotropic 2D or 3D spin-1/2 systems from their empirical saturation field H(s) (T=0) is proposed. Using modern theoretical methods we study how H(s) is affected by an antiferromagnetic (AFM) IC between frustrated chains described in the J(1)-J(2)-spin model with ferromagnetic 1st and AFM 2nd neighbor in-chain exchange. A complex 3D-phase diagram has been found. For Li(2)CuO(2) and Ca(2)Y(2)Cu(5)O(10), we show that H(s) is solely determined by the IC and predict H(s)≈61 T for the latter. With H(s)≈55 T from magnetization data one reads out a weak IC for Li(2)CuO(2) close to that obtained from inelastic neutron scattering.
2.
Phys Rev Lett
; 106(21): 219701; author reply 219702, 2011 May 27.
Artículo
en Inglés
| MEDLINE
| ID: mdl-21699347