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Helimagnetism in a disordered and geometrically frustrated quantum spin chain | | T. Masuda
; A. Zheludev
; A. Bush
; M. Markina
; A. Vasiliev
; | | Date: |
6 Oct 2003 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | Neutron diffraction and bulk measurements are used to determine the nature of the low-temperature ordered state in LiCu$_2$O$_2$, a $S=1/2$ spin-chain compound with competing interactions. The magnetic structure is found to be helimagnetic, with a propagation vector $(0.5,zeta,0)$, $zeta=0.174$. The nearest-neighbor exchange constant and frustration ratio are estimated to be $J=5.8$ meV and $J_2/J_1=0.29$, respectively. For idealized spin chains these parameter values would signify a gapped spin-liquid ground state. Long-range ordering is attributed to intrinsic non-stoichiometry. | | Source: | arXiv, cond-mat/0310126 | | Services: | Forum | Review | PDF | Favorites | |
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