Dresden 2017 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 19: Poster Session: Correlated Electrons 1
TT 19.25: Poster
Monday, March 20, 2017, 15:00–19:00, P2-EG
High-field ESR studies of the strong-leg spin-1/2 ladder antiferromagnet DIMPY — •A.N. Ponomaryov1, J. Wosnitza1, 2, K. Povarov3, D. Schmidiger3, A. Zheludev1, and S.A. Zvyagin1 — 1Hochfeld-magnet Labor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Institut für Festkörperphysik, TU Dresden, Dresden, Germany — 3Neutron Scattering and Magnetism, Laboratory for Solid State Physics, ETH Zürich, Switzerland
We report on high-field ESR studies of the Cu2+-based strong-leg spin-1/2 ladder antiferromagnet (C7H10N)2CuBr4 (also known as DIMPY). ESR spectra were measured at frequencies from 58 to 450 GHz at 1.5 K. In addition to the gapped mode observed previously [M. Ozerov et al., Phys. Rev. B 92, 241113(R) (2015)] a fine structure of the gapless mode was revealed. The data were analyzed employing ESR exchange narrowing theory, allowing us to estimate the interladder exchange interaction, J′=77 mK. Further peculiarities of the ESR spectra of DIMPY will be discussed.
This work was partly supported by the DFG.