Specific heat of single crystals of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="

Inderhees, S. E.; Salamon, M. B.; Goldenfeld, Nigel; Rice, J. P.; Pazol, B. G.; Ginsberg, D. M.; Liu, J. Z.; Crabtree, G. W.

doi:10.1103/physrevlett.60.1178

Cited by 246 publications

(25 citation statements)

References 9 publications

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“…Large temperature intervals dominated by thermodynamic fluctuations are observed in equilibrium and transport properties of the high-Tc cuprates (HTSC) near the normal-superconducting transition (1,2]. The study of Gaussian fluctuations, which are observed far from Tc, gives information on the effective dimensionality for superconductivity in the HTSC [1,3,4].…”

Section: Introductionmentioning

confidence: 98%

Low-Field Fluctuation Magnetoconductivity in Bi2Sr2CaCu2O8 and YBa2Cu3O7: Gaussian, Critical and LLL Scalings

Pureur

Costa

1997

Fluctuation Phenomena in High Temperature Superconductors

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Section: Introductionmentioning

confidence: 98%

Low-Field Fluctuation Magnetoconductivity in Bi2Sr2CaCu2O8 and YBa2Cu3O7: Gaussian, Critical and LLL Scalings

Pureur

Costa

1997

Fluctuation Phenomena in High Temperature Superconductors

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“…Other behavior is also possible. For example, in both conventional low-T C (superconducting transition temperature) superconductors 33 , as well as in cuprates [34][35][36] , there have been reports of enhanced T C near TBs. This implies that vortices can be repelled from TBs.…”

Section: Introductionmentioning

confidence: 99%

Diamagnetic vortex barrier stripes in underdopedBaFe2(As1−xPx)2

et al. 2016

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We report magnetic force microscopy (MFM) measurements on underdoped BaFe2(As1−xPx)2 (x = 0.26) that show enhanced superconductivity along stripes parallel to twin boundaries. These stripes of enhanced diamagnetic response repel superconducting vortices and act as barriers for them to cross. The width of the stripes is hundreds of nanometers, on the scale of the penetration depth, well within the inherent spatial resolution of MFM and implying that the width is set by the interaction of the superconductor with the MFM's magnetic tip. Unlike similar stripes observed previously by scanning SQUID in the electron doped Ba(Fe1−xCox)2As2, the stripes in the isovalently doped BaFe2(As1−xPx)2 disappear gradually when we warm the sample towards the superconducting transition temperature. Moreover, we find that the stripes move well below the reported structural transition temperature in BaFe2(As1−xPx)2 and that they can be much denser than in the Ba(Fe1−xCox)2As2 study. When we cool in finite magnetic field we find that some vortices appear in the middle of stripes, suggesting that the stripes may have an inner structure, which we cannot resolve. Finally, we use both vortex decoration at higher magnetic field and deliberate vortex dragging by the MFM magnetic tip to obtain bounds on the strength of the interaction between the stripes and vortices. We find that this interaction is strong enough to play a significant role in determining the critical current in underdoped BaFe2(As1−xPx)2.

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“…The component 1.43γ(1 -I-1.83t) describes BCS specific heat excess above the normal electronic component in the vicinity of Tc [10]. The last term describes Gaussian fluctuations [4,10]. The results f fitting for Dy and Tl samples are shown in Fig.…”

Section: G Gritzner and M Mairmentioning

confidence: 91%

“…magnetic contribution from either Dy+ 3 ions or antiferromagnetic correlations of Cu+2 sublattice) in a region close to the transition. The component 1.43γ(1 -I-1.83t) describes BCS specific heat excess above the normal electronic component in the vicinity of Tc [10]. The last term describes Gaussian fluctuations [4,10].…”

Section: G Gritzner and M Mairmentioning

confidence: 99%

Specific Heat and Magnetoresistance of Y-, Tl- and Bi-Type High-Temperature Superconductors

et al. 1997

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Specificheat of polycrystalline DyBa2Cu3O 7 and Tl0.58Pb0,42Sr1.6Ba0.4Ca2Cu3O9 samples, as well as the single crystal of Bi2Sr2CaCu2O8 have been measured within the temperature interval from 50 to 250 K. For Dy-and Tl-specimens the pronounced jump in specific heat and apparent contribution from Gaussian fluctuations of superconducting order parameter close to T, have been observed. In contrary, for Bi-specimen only a rounded maximum within a broad interval around Tc has been detected. Magnetoresistance measurements as a function of temperature just below T, have been carried out for Dy-and Tl-samples and the slopes of upper critical fields have been determined. The data have been analysed within a frame of Ginzburg-Landau-Abrikosov-Gorkov theory with additional Gaussian-like fluctuation term. The electronic specific heat coefficients 7, and the coherence length Ę have been obtained. The specific heat anomaly, especially the specific heat jump AC at the superconducting transition temperature Tc in high-temperature superconductors (HTSC) of yttrium, thalium and bismuth families have been thorougly investigated in view to look at the discrepancy between BCS-like and fluctuations-added-like behavior [1][2][3]. The classical BCS-Ginzburg-Landau (BCS-GL) approach [4] neglects any fluctuations because according to the so-called Ginzburg criterion [4,5], the temperature interval around Tc , in which this theory collapses, is extremally narrow for conventional superconductors. In Eq. (1) Tc , Hc , have their usual meaning, Hc (T) = Hc2(T)2 -1 /2 #c G L, and the so-called G-L parameter κGL is the ratio of the penetration depth λGL to the coherence length ξGL. On the contrary, for the HTSC, the temperature interval is of the order of 0.1-1 K [5, 6], mainly due (431)

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Specific heat of single crystals ofYBa2Cu3
S. E. Inderhees
¹
,
M. B. Salamon
²
,
Nigel Goldenfeld
³

et al.

Cited by 246 publications

References 9 publications

Low-Field Fluctuation Magnetoconductivity in Bi2Sr2CaCu2O8 and YBa2Cu3O7: Gaussian, Critical and LLL Scalings

Low-Field Fluctuation Magnetoconductivity in Bi2Sr2CaCu2O8 and YBa2Cu3O7: Gaussian, Critical and LLL Scalings

Diamagnetic vortex barrier stripes in underdopedBaFe2(As1−xPx)2

Specific Heat and Magnetoresistance of Y-, Tl- and Bi-Type High-Temperature Superconductors

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Specific heat of single crystals ofYBa2Cu3S. E. Inderhees1, M. B. Salamon2, Nigel Goldenfeld3 et al.

Cited by 246 publications

References 9 publications

Low-Field Fluctuation Magnetoconductivity in Bi2Sr2CaCu2O8 and YBa2Cu3O7: Gaussian, Critical and LLL Scalings

Low-Field Fluctuation Magnetoconductivity in Bi2Sr2CaCu2O8 and YBa2Cu3O7: Gaussian, Critical and LLL Scalings

Diamagnetic vortex barrier stripes in underdopedBaFe2(As1−xPx)2

Specific Heat and Magnetoresistance of Y-, Tl- and Bi-Type High-Temperature Superconductors

Contact Info

Product

Resources

About

Specific heat of single crystals ofYBa2Cu3
S. E. Inderhees
¹
,
M. B. Salamon
²
,
Nigel Goldenfeld
³

et al.