Doping Dependence of the Effects of In-Plane Disorder on T c and the Pseudogap in Single Layer La214 and Double Layer Y123: a Comparative Study

Naqib, S. H.; Islam, R. S.

doi:10.1007/s10948-013-2303-4

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…It is also interesting to note that the p values of the two UD films are quite close to the 1/8 th doping where the spin/charge stripe correlations are at their strongest. [38][39][40] This study shows that the exponents m and β , as well as the characteristic field H 0 , vary smoothly as a function of hole content and no noticeable extra feature appears in the vicinity of the 1/8 th anomaly. This indicates that the inhomogeneity in the charge/spin arrangements induced by the incipient stripe instability does not affect the vortex dynamics significantly in Y123.…”

Section: Analysis Of the ρ Ab (T H) Datamentioning

confidence: 61%

Field-dependent resistive transitions in YBa ₂ Cu ₃ O _{7−
δ} thin films: Influence of the pseudogap on vortex dynamics

Naqib

Islam²

2015

Chinese Phys. B

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The nature of resistive transition of high-quality crystalline thin films of YBa 2 Cu 3 O 7−δ has been studied under magnetic fields (H) applied along the c direction over a wide range of doped holes, p, in the CuO 2 planes. The field-and temperature-dependent in-plane resistivity, ρ ab (T, H), has been analyzed within the thermally assisted flux-flow (TAFF) formalism. The flux activation energy, U(T, H), has been extracted from this analysis. The low-T part of the ρ ab (T, H) data can be described by an activation energy having the functional form of U(T, H) = (1 −t) m (H 0 /H) −β , where t = T /T c (reduced temperature), and H 0 is a field scale that primarily determines the magnitude of U(T, H). The temperature exponent, m, shows a systematic variation with p, whereas the field exponent, β , is insensitive to the p values and is close to unity. The H 0 , on the other hand, changes rapidly as p is varied. U(T, H) is linked to the pinning potential and consequently on the superconducting condensation energy. Since the normal state pseudogap directly affects superconducting condensation energy, a clear correspondence between H 0 and the PG energy scale, ε g , is found. Possible implications of these results are discussed.

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Section: Analysis Of the ρ Ab (T H) Datamentioning

confidence: 61%

Field-dependent resistive transitions in YBa ₂ Cu ₃ O _{7−
δ} thin films: Influence of the pseudogap on vortex dynamics

Naqib

Islam²

2015

Chinese Phys. B

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“…For instance, the cross-over from the linear dependence of the resistivity on temperature in the non-F-L region to a stronger dependence in the PG region is a signature of the PG. Some researchers opine that T * extends to the superconducting region up to a quantum critical point (QCP), the point in the phase diagram of a material where a continuous phase transition occurs at absolute zero due to quantum fluctuations caused by Heisenberg's uncertainty principle [5,6] …”

Section: Introductionmentioning

confidence: 99%

Effect of Multiple Orders on Superconducting Transition Temperature of Hole Doped Cuprates

Qabid

Naqib

2017

J. Sci. Res.

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Hole doped high-T c cuprate superconductors are strongly correlated electronic systems. In these materials, various electronic orders are often found, but whether they support or compete with superconducting order is not unambiguous. Superconductivity normally manifests itself by a superconducting gap in the electronic density of states (EDOS). In cuprates, a gap appears even in the normal state called the pseudogap (PG). For certain doping range, spin density wave and charge density wave coexist with superconductivity by inducing corresponding additional gaps in the EDOS. In this study, we have tried to obtain expression for superconducting transition temperature, T c by solving the BCS (Bardeen-Cooper-Schrieffer) energy gap equation in the presence of depleted EDOS of various origins and types. We have been successful to solve the weak-coupling BCS integral equation analytically in some special cases and also in the general case by using numerical integration. We have found that depending on conditions these non-pairing gaps/orders can enhance as well as reduce T c .

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Unusual Enhancement of Normal and Superconducting State Properties of (100-x)YBa2Cu3O7-δ + xNi (x = 1, 2.5, 5, 7.5, 10, and 15 wt%) Composites with Low Level of Ni Additives

El-Aziz

Afifi

Hager

et al. 2019

J Supercond Nov Magn

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Doping Dependence of the Effects of In-Plane Disorder on T c and the Pseudogap in Single Layer La214 and Double Layer Y123: a Comparative Study

Cited by 5 publications

References 32 publications

Field-dependent resistive transitions in YBa ₂ Cu ₃ O _{7−
δ} thin films: Influence of the pseudogap on vortex dynamics

Field-dependent resistive transitions in YBa ₂ Cu ₃ O _{7−
δ} thin films: Influence of the pseudogap on vortex dynamics

Effect of Multiple Orders on Superconducting Transition Temperature of Hole Doped Cuprates

Unusual Enhancement of Normal and Superconducting State Properties of (100-x)YBa2Cu3O7-δ + xNi (x = 1, 2.5, 5, 7.5, 10, and 15 wt%) Composites with Low Level of Ni Additives

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Doping Dependence of the Effects of In-Plane Disorder on T c and the Pseudogap in Single Layer La214 and Double Layer Y123: a Comparative Study

Cited by 5 publications

References 32 publications

Field-dependent resistive transitions in YBa 2 Cu 3 O 7− δ thin films: Influence of the pseudogap on vortex dynamics

Field-dependent resistive transitions in YBa 2 Cu 3 O 7− δ thin films: Influence of the pseudogap on vortex dynamics

Effect of Multiple Orders on Superconducting Transition Temperature of Hole Doped Cuprates

Unusual Enhancement of Normal and Superconducting State Properties of (100-x)YBa2Cu3O7-δ + xNi (x = 1, 2.5, 5, 7.5, 10, and 15 wt%) Composites with Low Level of Ni Additives

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Product

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Field-dependent resistive transitions in YBa ₂ Cu ₃ O _{7−
δ} thin films: Influence of the pseudogap on vortex dynamics

Field-dependent resistive transitions in YBa ₂ Cu ₃ O _{7−
δ} thin films: Influence of the pseudogap on vortex dynamics