Batchelor, MurrayMaslen, Mark2015-12-132015-12-130305-4470http://hdl.handle.net/1885/91817We find families of integrable n-leg spin-1/2 ladders and tubes with general isotropic exchange interactions between spins. These models are equivalent to su(N) spin chains with N = 2n. Arbitrary rung interactions in the spin tubes and ladders induce chemical potentials in the equivalent spin chains. The potentials are n-dependent and differ for the tube and ladder models. The models are solvable by means of nested Bethe ansatze.199910.1088/0305-4470/32/33/1022015-12-12