Glassy spin freezing and NMR wipeout effect in the high-TcsuperconductorLa1.90

Cu nuclear magnetic resonance study of charge and spin stripe order inLa1.875Ba0.125CuO4

“…To add to the controversy, subsequently a marked difference between wipeout fractions in powder and single crystals was observed 14,17,19,25 , as well as differences between Cu and O NMR and NQR 8,10,20 . Copper wipeout is also seen in Ni-codoped cuprates 25 and La-based cuprates at doping close to the insulator-superconductor boundary 26 , in line with a more general relationship with spin, rather than charge fluctuations 24 . Yet important insight into the stripes would be gained from Cu NMR/NQR if the signal could be detected, since copper nuclei have a quadrupolar moment and the signals are thus sensitive to charge effects.…”

“…Yet without access to the disappeared signal (except at very low temperatures 14,15 ) it was hard to pin down the physical origin of the wipeout and its connection to charge stripes. The fraction of wiped-out nuclei has been phenomenologically related to the charge stripe order parameter 17,18 , and wipeout mechanisms based on spin fluctuations have been put forward 14,21,24 . To add to the controversy, subsequently a marked difference between wipeout fractions in powder and single crystals was observed 14,17,19,25 , as well as differences between Cu and O NMR and NQR 8,10,20 .…”

Similar glassy features in theL139aNMR response of pure and disorderedLa1.88Mitrović1, Julien2, Vaulx3 et al. 2008Phys. Rev. BSelf Cite8211980View full textAdd to dashboardCite

“…The shaded areas mark the high frequency peak where the rates presented here are determined. The low frequency peak contains the signal from other quadrupolarly split˙+ 1 2 ↔ − 1 2¸t ransition lines [19].…”

“…As in [19], the applied magnetic field was tilted away from the c-axis by θ ∼ 10 • , in order to obtain a sharp peak on the high frequency edge of the 139 La central, + 1 2 ↔ − 1 2 , Zeeman transition. T 1 was measured on this peak, shown as a shaded part of the sample spectra in the inset to Fig.…”

NMR studies of pseudogap and electronic inhomogeneity in Bi2Sr2CaCu2OCrocker1, Dioguardi2, apRoberts-Warren3 et al. 2011Phys. Rev. B

“…1,16 Nuclear magnetic resonance (NMR) of the oxygen nuclei in the cuprates offers unique insight into the interplay of charge and spin degrees of freedom. [17][18][19][20][21][22] Unlike STM, NMR probes the bulk of the material, and both the quadrupolar moment and nuclear magnetic moment of the 17 O couple to the local charge and spin environments, respectively. 17 phases.…”