Gippius, Andrei Andreevich ; Antipov, Evgeny V. ; Hoffmann, W. ; Lüders, Klaus ; Buntkowsky, Gerd (2023)
Low-frequency spin dynamics as probed by ⁶³Cu and ¹⁹⁹Hg NMR in HgBa₂CuO₄₊δ superconductors with different oxygen content.
In: Physical Review B, 1999, 59 (1)
doi: 10.26083/tuprints-00024240
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
⁶³Cu and ¹⁹⁹Hg nuclear magnetic resonance was performed on a series of powder HgBa₂CuO₄₊δ samples with different oxygen content δ in order to study the influence of oxygen doping on the spin dynamics in the normal and superconducting state. The spin-lattice relaxation time T₁ of ¹⁹⁹Hg and ⁶³Cu 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 (Tc=96 K) we compared our experimental results to numerical calculations of the spin-lattice relaxation rate as a function of temperature below Tc 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 2Δ/kBTc within the AF fluctuation model. The comparison with our experimental relaxation data shows that for ¹⁹⁹Hg nuclei in the orientation B₀∥(a,b) plane as well as for ⁶³Cu nuclei in both orientations, B₀∥(a,b) plane and B₀∥c axis, the experimental results are in coincidence with the dx2₋y2-wave symmetry with the gap parameter 2Δ/kBTc=7.02.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Gippius, Andrei Andreevich ; Antipov, Evgeny V. ; Hoffmann, W. ; Lüders, Klaus ; Buntkowsky, Gerd |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Low-frequency spin dynamics as probed by ⁶³Cu and ¹⁹⁹Hg NMR in HgBa₂CuO₄₊δ superconductors with different oxygen content |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 1999 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 59 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.26083/tuprints-00024240 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/24240 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | ⁶³Cu and ¹⁹⁹Hg nuclear magnetic resonance was performed on a series of powder HgBa₂CuO₄₊δ samples with different oxygen content δ in order to study the influence of oxygen doping on the spin dynamics in the normal and superconducting state. The spin-lattice relaxation time T₁ of ¹⁹⁹Hg and ⁶³Cu 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 (Tc=96 K) we compared our experimental results to numerical calculations of the spin-lattice relaxation rate as a function of temperature below Tc 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 2Δ/kBTc within the AF fluctuation model. The comparison with our experimental relaxation data shows that for ¹⁹⁹Hg nuclei in the orientation B₀∥(a,b) plane as well as for ⁶³Cu nuclei in both orientations, B₀∥(a,b) plane and B₀∥c axis, the experimental results are in coincidence with the dx2₋y2-wave symmetry with the gap parameter 2Δ/kBTc=7.02. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-242406 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 12 Jul 2023 12:48 |
| Letzte Änderung: | 13 Jul 2023 05:19 |
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