Nuclear spin relaxation rates in two-leg spin ladders

Details Nuclear spin relaxation rates in two-leg spin ladders Nuclear spin relaxation rates in two-leg spin ladders

1999-07-08

arxiv.org/abs/cond-mat/9907117v2

Physics

Condensed Matter

Strongly Correlated Electrons

Few modifications from the previous version 4 pages, 5 figures, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.84.1320

Using the transfer-matrix DMRG method, we study the nuclear spin relaxation rate 1/T_1 in the two-leg s=1/2 ladder as function of the inter-chain (J_{\perp}) and intra-chain (J_{|}) couplings. In particular, we separate the q_y=0 and \pi contributions and show that the later contribute significantly to the copper relaxation rate ^{63}(1/T_1) in the experimentally relevant coupling and temperature range. We compare our results to both theoretical predictions and experimental measures on ladder materials.

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