NMR study of spin fluctuations in YBa2Cu3O6+x

Berthier, C.; Berthier, Y.; Butaud, P.; Clark, W. G.; Gillet, J.A.; Horvatić, M.; Ségransan, P.; Henry, J.Y.

doi:10.1016/0921-4534(91)91794-5

Cited by 19 publications

(22 citation statements)

References 10 publications

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“…the contribution by Berthier et al [11]). I will use the principal axis convention by Berthier et al [11], who label the principal axis of the hyperfine interaction along the Cu-O-Cu bond by Z (parallel to the b-axis) and the other principal axes by X ( parallel to the c-axis) and Y (parallel to the a-axis). For the other oxygen in the CuO 2 plane the (XYZ) axis system is rotated by ~/2 about the X-axis.…”

Section: (B) 170(2 3) In the Cuo 2 Planementioning

confidence: 99%

“…Table 1 lists some representative values for the hyperfine interaction parameters as far as they could be determined experimentally. Slichter et al [9], Takigawa et al [52] and others [10,11,35,57] analyzed very carefully the 63K Knight shift and spin lattice relaxation anisotropy and were able to draw some conclusions about the 63Cu hyperfine interaction. A more direct approach was used by Yoshinari et al [58] who applied the JaccarinoClogston plot of Knight shift versus susceptibility in order to extract the hyperfine interactions of 63Cu and 170 in cuprate superconductors.…”

Section: (B) 170(2 3) In the Cuo 2 Planementioning

confidence: 99%

“…It is remarkable that Z(0) is fairly temperamre independent (Pauli like) in the highly doped state (YBCO7), whereas it decreases in absolute value and decreases with decreasing temperature in the partially doped states (YBCO (124)). This phenomenon has been observed in a number of cases by 63Cu, 170, 89y (see contributions [9,11,12,55] and 2~ NMR [28,56,[62][63][64][65][66][67]). The decrease in absolute value with smaller hole concentration can possibly be interpreted in terms of a reduced density of states.…”

Section: Knight Shift and The Static Susceptibilitymentioning

confidence: 99%

“…NMR has proven to be an extremely versatile spectroscopic tool in solid state physics over the years [2][3][4][5][6]. Reviews on the application of NMR to high-Te superconductors can be found in [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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What does NMR tell us about the electronic state of high-T c superconductors?

Mehring

1992

Appl. Magn. Reson.

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An introduction to the models which are usually applied, when interpreting the NMR (nuclear magnetic resonance) parameter Knight shift (Ks) and spin-lattice relaxation rate 1/T~ in the normal and the superconducting state of high-temperature superconductors, is given. The different hyperfine interaction parameters involved, as well as the static and dynamic susceptibility z(q,o)) will be discussed. I will point at those highlights as antiferromagnetic correlations, spin gap and vortex lattice dynamics which have emerged from the analysis of the NMR data.

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Section: (B) 170(2 3) In the Cuo 2 Planementioning

confidence: 99%

Section: (B) 170(2 3) In the Cuo 2 Planementioning

confidence: 99%

Section: Knight Shift and The Static Susceptibilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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What does NMR tell us about the electronic state of high-T c superconductors?

Mehring

1992

Appl. Magn. Reson.

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“…This observation is explained by the occurrence of a pseudo spin gap in neutron scattering experiments [39,40]. This volume contains a number contributions addressing this aspect [19, [41][42][43][44]. The lines drawn through the data points correspond to the expression [19,45]:…”

Section: Antiferromagnetic Fluctuations and Spin Gapmentioning

confidence: 99%

205Tl NMR in the Cuprate Superconductor Tl2Ba2CaCu2O8−δ: Evidence for a pseudo spin gap

Winzek

Mehring

1992

Appl. Magn. Reson.

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2~ in Tl2Ba2Can_lCunOs_ 6 for different n and 6 is reviewed. For n = 2,3 the 2~ spectra consist of two lines. The main line arises from TI(l) in the TlO-layer whereas the defect line belongs to Tl(2) in the Ca-layers between the CuO2-1ayers. The temperature dependent Knight shift of the TI(2) (defect) line is caused by the hyperfine interaction with the CuOz-layer and is strongly related to the oxygen content of the sample. We find quasiparticle behavior for the TI(2) line similar to the 89y Knight shift in the YBa2Cu306+ £ system. In contrast the TI(l) line shows strong antiferromagnetic correlations with indication of pseudo spin gap opening above the superconducting transition temperature T c.

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Spindynamik des Hoch‐T_c‐Systems YBa₂Cu₃O_6+x

Rossat‐Mignod

1992

Phys. Bl.

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Dieser Beitrag behandelt Experimente mit inelastischer Neutronenstreuung an Einkristallen des Systems YBa2Cu3O6+x. Die Spindynamik wurde systematisch in charakteristischen Bereichen untersucht: den reinen und dotierten antiferromagnetischen (AF)Zuständen (x = 0,15; 0,37) sowie in den schwach dotierten (x = 0,45; 0,51), stark dotierten (x = 0,69; 0,92) und überdotierten (x = 1) metallischen Zuständen, die allesamt einen supraleitenden Grundzustand aufweisen. Die Dotierung mit Löchern wirkt sich stark auf die antiferromagnetische Ordnung aus; im metallischen Zustand gibt es aber weiterhin dynamische AF‐Korrelationen. Im Spin‐Anregungsspektrum weisen alle supraleitenden Proben eine Bandlücke auf; sie wird jedoch in der Nähe des Isolator‐Metall‐Übergangs schwächer. Darüber hinaus findet man eine recht ungewöhnliche Abhängigkeit des Spinanregungsspektrums von der Temperatur.

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NMR study of spin fluctuations in YBa2Cu3O6+x

Cited by 19 publications

References 10 publications

What does NMR tell us about the electronic state of high-T c superconductors?

What does NMR tell us about the electronic state of high-T c superconductors?

205Tl NMR in the Cuprate Superconductor Tl2Ba2CaCu2O8−δ: Evidence for a pseudo spin gap

Spindynamik des Hoch‐T_c‐Systems YBa₂Cu₃O_6+x

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NMR study of spin fluctuations in YBa2Cu3O6+x

Cited by 19 publications

References 10 publications

What does NMR tell us about the electronic state of high-T c superconductors?

What does NMR tell us about the electronic state of high-T c superconductors?

205Tl NMR in the Cuprate Superconductor Tl2Ba2CaCu2O8−δ: Evidence for a pseudo spin gap

Spindynamik des Hoch‐Tc‐Systems YBa2Cu3O6+x

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Spindynamik des Hoch‐T_c‐Systems YBa₂Cu₃O_6+x