On the estimate of the spin-gap in quasi-1D Heisenberg antiferromagnets from nuclear spin-lattice relaxation
| dc.creator | Melzi, R. | |
| dc.creator | Carretta, P. | |
| dc.date | 1999-04-06 | |
| dc.date.accessioned | 2026-07-25T23:47:53Z | |
| dc.description | We present a careful analysis of the temperature dependence of the nuclear spin-lattice relaxation rate $1/T_1$ in gapped quasi-1D Heisenberg antiferromagnets. It is found that in order to estimate the value of the gap correctly from $1/T_1$ the peculiar features of the dispersion curve for the triplet excitations must be taken into account. The temperature dependence of $1/T_1$ due to two-magnon processes, is reported for different values of the ratio $r=J_{\perp}/J_{\parallel}$ between the superexchange constants in a 2-leg-ladder. As an illustrative example we compare our results to the experimental findings for $^{63}Cu 1/T_1$ in the dimerized chains and 2-leg-ladders contained in Sr$_{14}Cu_{24}O_{41}$ | |
| dc.description | 4 pages, 3 figures, Proc. of the Stripes 98 Conference (Roma, June 1998) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9904074 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9904074 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/101515 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | On the estimate of the spin-gap in quasi-1D Heisenberg antiferromagnets from nuclear spin-lattice relaxation | |
| dc.type | text |