Gippius, A. A. ; Antipov, E. V. ; Hoffmann, W. ; Lüders, K. ; Buntkowsky, G. (1999)
Low-frequency spin dynamics as probed by Cu-63 and Hg-199 NMR in HgBa2CuO4+delta superconductors with different oxygen content.
In: Physical Review B, 59 (1)
doi: 10.1103/PhysRevB.59.654
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Cu-63 and Hg-199 nuclear magnetic resonance was performed on a series of powder HgBa2CuO4+delta samples with different oxygen content delta in order to study the influence of oxygen doping on the spin dynamics in the normal and superconducting state. The spin-lattice relaxation time T-1 of Hg-199 and Cu-63 nuclei were measured over a wide range of temperature at different orientations of the crystallites with respect to the magnetic field. For the optimally doped sample (T-c=96 K) we compared our experimental results to numerical calculations of the spin-lattice relaxation rate as a function of temperature below T-c for several types of the order parameter symmetry: isotropic s wave, anisotropic s wave without nodes, s wave with nodes, and d wave, using the different values of the gap parameter 2 Delta/k(B)T(c) within the AF fluctuation model. The comparison with our experimental relaxation data shows that for Hg-199 nuclei in the orientation B(0)parallel to(a,b) plane as well as for Cu-63 nuclei in both orientations, B(0)parallel to(a,b) plane and B(0)parallel to c axis, the experimental results are in coincidence with the d(x2-y2)-wave symmetry with the gap parameter 2 Delta/k(B)T(c)=7.02. S0163-1829(99)09801-X.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 1999 |
| Autor(en): | Gippius, A. A. ; Antipov, E. V. ; Hoffmann, W. ; Lüders, K. ; Buntkowsky, G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Low-frequency spin dynamics as probed by Cu-63 and Hg-199 NMR in HgBa2CuO4+delta superconductors with different oxygen content |
| Sprache: | Englisch |
| Publikationsjahr: | 1999 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 59 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1103/PhysRevB.59.654 |
| URL / URN: | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.59.65... |
| Kurzbeschreibung (Abstract): | Cu-63 and Hg-199 nuclear magnetic resonance was performed on a series of powder HgBa2CuO4+delta samples with different oxygen content delta in order to study the influence of oxygen doping on the spin dynamics in the normal and superconducting state. The spin-lattice relaxation time T-1 of Hg-199 and Cu-63 nuclei were measured over a wide range of temperature at different orientations of the crystallites with respect to the magnetic field. For the optimally doped sample (T-c=96 K) we compared our experimental results to numerical calculations of the spin-lattice relaxation rate as a function of temperature below T-c for several types of the order parameter symmetry: isotropic s wave, anisotropic s wave without nodes, s wave with nodes, and d wave, using the different values of the gap parameter 2 Delta/k(B)T(c) within the AF fluctuation model. The comparison with our experimental relaxation data shows that for Hg-199 nuclei in the orientation B(0)parallel to(a,b) plane as well as for Cu-63 nuclei in both orientations, B(0)parallel to(a,b) plane and B(0)parallel to c axis, the experimental results are in coincidence with the d(x2-y2)-wave symmetry with the gap parameter 2 Delta/k(B)T(c)=7.02. S0163-1829(99)09801-X. |
| Freie Schlagworte: | high-temperature superconductors, magnetic-resonance, lattice relaxation state, yba2cu3o7, gap, hgba2cacu2o6+delta model |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 27 Okt 2014 20:41 |
| Letzte Änderung: | 10 Jul 2023 11:23 |
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