title: Nuclear spin relaxation rates in two-Leg spin ladders
abstract: Using the transfer-matrix density-matrix renormalization group method, we study the nuclear spin relaxation rate 1/T(1) in the two-leg s = 1 / 2 ladder as a function of the interchain (J( perpendicular)) and intrachain (J( parallel)) couplings. In particular, we separate the q(y) = 0 and pi contributions and show that the latter 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.
authors.affiliation: Institut Romand de Recherche Numerique en Physique des Materiaux (IRRMA), INR-Ecublens, CH-1015 Lausanne, Switzerland.
authors.initials: F
authors.lastname: Naef
authors.initials: X
authors.lastname: Wang