Field-Induced Gap in the Spin-1/2 Heisenberg Chain Compound Cu-Pyrimidine Dinitrate: ESR Studies in Magnetic Fields up to 63 T

Ozerov, M.Wosnitza, J.Cizmar, E.Feyerherm, R.Manmana, S. R.Mila, F.Zvyagin, S. A.2013-03-282013-03-282013-03-28201310.1007/s10909-012-0757-6https://infoscience.epfl.ch/handle/20.500.14299/90706WOS:000314183900008Results of electron spin resonance studies of copper pyrimidine dinitrate (Cu-PM, [PM-Cu(NO3)(2)(H2O)(2)] (n) , PM = pyrimidine), a spin-1/2 antiferromagnetic chain material with alternating g-tensor and Dzyaloshinskii-Moriya interactions, in pulsed magnetic fields up to 63 T are reported. The field-induced gap shows a non-monotonic behavior with a minimum in the vicinity of the saturation field H (sat) =48.5 T. This is associated with a transition from the sine-Gordon region to a spin-polarized state with magnon excitations. By comparing the entire set of experimental data with results of density matrix renormalization group calculations for Cu-PM, the validity of the used theoretical approach is proven.Electron spin resonanceField-induced gapSolitonsBreathersField-Induced Gap in the Spin-1/2 Heisenberg Chain Compound Cu-Pyrimidine Dinitrate: ESR Studies in Magnetic Fields up to 63 Ttext::journal::journal article::research article