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Durham University

Department of Physics

Staff profile

Publication details for Professor Tom Lancaster

Xiao, F., Möller, J. S., Lancaster, T., Williams, R. C., Pratt, F. L., Blundell, S. J., Ceresoli, D., Barton, A. M. & Manson, J. L. (2015). Spin diffusion in the low-dimensional molecular quantum Heisenberg antiferromagnet Cu(pyz)(NO3)2 detected with implanted muons. Physical Review B 91(14): 144417.

Author(s) from Durham


We present the results of muon-spin relaxation measurements of spin excitations in the one-dimensional quantum Heisenberg antiferromagnet Cu(pyz)(NO3)2. Using density-functional theory we propose muon sites and assess the degree of perturbation the muon probe causes on the system. We identify a site involving the muon forming a hydroxyl-type bond with an oxygen on the nitrate group that is sensitive to the characteristic spin dynamics of the system. Our measurements of the spin dynamics show that in the temperature range TNJ and that in the related two-dimensional system Cu(pyz)2(ClO4)2.