Empirical scaling of the vortex glass line above 1 T for high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>superconductors of varying anisotropy

Lundqvist, Björn; Rydh, Andreas; Eltsev, Yu.; Rapp, Ö.; Andersson, Magnus

doi:10.1103/physrevb.57.r14064

Cited by 19 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, in the large Q ͑or q͒ limit, the modified form of either expression, which is found here and in Ref. 10, reduces to the form of the expression found empirically by Lundqvist et al, 13 …”

Section: Modification Of the Blatter-ivlev Modelsupporting

confidence: 63%

Evolution and analysis of the vortex solid to vortex liquid melting line inY1−xPrxBa2Cu3

Taylor

Maple

2007

Phys. Rev. B

View full text Add to dashboard Cite

By extending magnetotransport measurements to fields up to 45 T, we have been able to examine the melting line of Y 1−x Pr x Ba 2 Cu 3 O 6.97 ͑x =0-0.4͒ thin film samples and that of an oxygen deficient YBa 2 Cu 3 O 6.5 single crystal over an extended temperature range of 0.03T c ഛ T ഛ T c , larger than heretofore reported. These measurements provide an opportunity to examine the evolution of the behavior of vortices along nearly the entire melting line of this important high-T c superconducting system. Within the context of the quantumthermal fluctuation model of Blatter and Ivlev ͓Phys. Rev. Lett. 70, 2621 ͑1993͔͒, we empirically arrive at a modified form of their expression for the vortex-lattice melting line by considering that the mechanism responsible for the vortex flux line relaxation time is not simply the scattering time of quasiparticles within the vortex core. This form of the melting line is demonstrated to fit over the entire melting line of each sample, implying no crossover in dynamics from three dimensions to two dimensions. This result implies that the physical mechanism responsible for the manner and conditions under which the melting of the vortex-solid ensemble takes place can be described smoothly over the entire temperature-field range. It is proposed that the relaxation time of a single vortex flux line, displaced by quantum-thermal fluctuations, is related to the critical behavior associated with the scaling properties of the fluctuation conductivity.

show abstract

Section: Modification Of the Blatter-ivlev Modelsupporting

confidence: 63%

Evolution and analysis of the vortex solid to vortex liquid melting line inY1−xPrxBa2Cu3

Taylor

Maple

2007

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…The characteristic magnetic field is proportional to the pinning energy, and thus closely related to the condensation energy 23 . We have obtained by analysing the vortex glass transition line, given by the empirical formula 51 – 53 , with , where is the critical temperature at zero field and the field dependent vortex-glass transition temperature. We find that depends on the Hall number, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state

Stangl

Palau

Deutscher

et al. 2021

Sci Rep

View full text Add to dashboard Cite

The functional properties of cuprates are strongly determined by the doping state and carrier density. We present an oxygen doping study of YBa2Cu3O7-δ (YBCO) thin films from underdoped to overdoped state, correlating the measured charge carrier density, $${n}_{\mathrm{H}}$$ n H , the hole doping, p, and the critical current density, $${J}_{c}$$ J c . Our results show experimental demonstration of strong increase of $${J}_{c}$$ J c with $${n}_{\mathrm{H}}$$ n H , up to Quantum Critical Point (QCP), due to an increase of the superconducting condensation energy. The ultra-high $${J}_{c}$$ J c achieved, 90 MA cm−2 at 5 K corresponds to about a fifth of the depairing current, i.e. a value among the highest ever reported in YBCO films. The overdoped regime is confirmed by a sudden increase of $${n}_{\mathrm{H}}$$ n H , associated to the reconstruction of the Fermi-surface at the QCP. Overdoping YBCO opens a promising route to extend the current carrying capabilities of rare-earth barium copper oxide (REBCO) coated conductors for applications.

show abstract

“…It was reported that the broadening of the resistivity transition in a magnetic field is a direct consequence of the thermal fluctuation in the vortex system [24]. Therefore, resistive transport measurements are commonly used to study vortices and vortex phase transitions [25][26][27][28][29]. Note that the calculations described below correspond to the irradiated sample only for simplicity.…”

Section: Resultsmentioning

confidence: 99%

Vortex-glass phase transition and enhanced flux pinning in C⁴⁺-irradiated BaFe_1.9Ni_0.1As₂superconducting single crystals

Shahbazi

Wang

Ghorbani

et al. 2013

Supercond. Sci. Technol.

View full text Add to dashboard Cite

We report the effects of C 4+ -irradiation on the superconducting properties of BaFe 1.9 Ni 0.1 As 2 single crystal. The BaFe 1.9 Ni 0.1 As 2 single crystal before and after C 4+ -irradiation was characterized by magnetic, magneto-transport and magneto-optical techniques over a wide range of magnetic fields (0-13 T) and temperatures (2-200 K). We demonstrate that the C 4+ -irradiation significantly enhances the in-field critical current density (by a factor of up to 1.5 at 5 K) and induces enhanced flux jumping at 2 K, with only a small degradation (by 0.5 K) of the critical temperature, T c . The vortex phase diagram describing the evolution of the vortex-glass transition temperature with magnetic field and the upper critical field has been resolved for the C 4+ -irradiated sample. For temperatures below T c , the resistivity curves and the pinning potential were found to show good scaling, using a modified model for vortex-liquid resistivity. The vortex state is three dimensional at temperatures lower than a characteristic temperature. Good agreement between the thermally activated flux flow model, which is usually employed to account for the resistivity in the vortex-liquid region, and the modified vortex-liquid model, has been observed.

show abstract

Empirical scaling of the vortex glass line above 1 T for high-Tcsuperconductors of varying anisotropy

Cited by 19 publications

References 23 publications

Evolution and analysis of the vortex solid to vortex liquid melting line inY1−xPrxBa2Cu3

Evolution and analysis of the vortex solid to vortex liquid melting line inY1−xPrxBa2Cu3

Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state

Vortex-glass phase transition and enhanced flux pinning in C⁴⁺-irradiated BaFe_1.9Ni_0.1As₂superconducting single crystals

Contact Info

Product

Resources

About

Empirical scaling of the vortex glass line above 1 T for high-Tcsuperconductors of varying anisotropy

Cited by 19 publications

References 23 publications

Evolution and analysis of the vortex solid to vortex liquid melting line inY1−xPrxBa2Cu3

Evolution and analysis of the vortex solid to vortex liquid melting line inY1−xPrxBa2Cu3

Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state

Vortex-glass phase transition and enhanced flux pinning in C4+-irradiated BaFe1.9Ni0.1As2superconducting single crystals

Contact Info

Product

Resources

About

Vortex-glass phase transition and enhanced flux pinning in C⁴⁺-irradiated BaFe_1.9Ni_0.1As₂superconducting single crystals