Zero-magnetic-field dynamic scaling in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Bi</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">CaCu</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:mro

Sefrioui, Z.; Arias, D.; León, Carlos; Santamarı́a, J.; González, E. M.; Vicent, J. L.

doi:10.1103/physrevb.70.064502

Cited by 10 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even though the SPS at absolute zero (T=0) is said to be scales linearly below the quantum critical point (QCP), T-variation of the SPS reveals how the superfluid density varies in such superconducting systems. Current-voltage (IV ) characteristics below T c are found to be very effective to extract the SPS in such systems [24,25].…”

Section: Introductionmentioning

confidence: 99%

Nonmagnetic scattering induced suppression of superfluid density in Bi-2212

Sk¹,

Rakshit²,

Ghosh³

2022

Phys. Scr.

View full text Add to dashboard Cite

Nonlinear current-voltage (IV) characteristics of Bi-2212 observed in the presence of the nonmagnetic impurity have been explained incorporating the idea of Berezinskii-Kosterlitz - Thouless (BKT). An exponent (η) is extracted as a function of temperature (T) for several Bi2-xSr2 CaCu2-x ZnxO8+δ (Bi-2212) superconducting samples. Within the framework of the Ambegaokar-Halperin-Nelson-Siggia (AHNS) theory we have extracted the superfluid phase stiffness (SPS) as a function of T. A scaling between the SPS and critical temperature is observed. Strong suppression by the nonmagnetic impurity has been explained using the idea of localized phase fluctuations in the superconducting planes.

show abstract

Section: Introductionmentioning

confidence: 99%

Nonmagnetic scattering induced suppression of superfluid density in Bi-2212

Sk¹,

Rakshit²,

Ghosh³

2022

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…13 Measurements on Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO), a similar hole-doped cuprate superconductor, yield similarly con-flicting results in zero field: in crystals, there has been reported a 2D to 3D crossover 14 as well as a critical regime with multiple exponents; 15 this multiple critical regime has also been observed in thin films, 16 while other measurements on films claim to see 3D diffusive dynamics 17 and still others see a 2D Kosterlitz-Thouless transition in this material. 18 Our work on this complex topic has called into question the method most researchers previously used to analyze the data and has suggested a criterion for determining the existence of a phase transition and also for determining the critical parameters. 6 We have also pointed out the often-overlooked effects of current noise on nonlinear current vs. voltage (I − V ) curves, 19 and argued that the wide range of critical exponents in films of thickness d > ∼ 2000 Å is due to finite size effects limiting the size of the fluctuations.…”

mentioning

confidence: 99%

Effects of self field and low magnetic fields on the normal-superconducting phase transition

et al. 2005

View full text Add to dashboard Cite

Researchers have studied the normal-superconducting phase transition in the high-Tc cuprates in a magnetic field (the vortex-glass or Bose-glass transition) and in zero field. Often, transport measurements in "zero field" are taken in the Earth's ambient field or in the remnant field of a magnet. We show that fields as small as the Earth's field will alter the shape of the current vs. voltage curves and will result in inaccurate values for the critical temperature Tc and the critical exponents ν and z, and can even destroy the phase transition. This indicates that without proper screening of the magnetic field it is impossible to determine the true zero-field critical parameters, making correct scaling and other data analysis impossible. We also show, theoretically and experimentally, that the self-field generated by the current flowing in the sample has no effect on the current vs. voltage isotherms.PACS numbers: 74.40.+k, 74.25.Dw, 74.72.Bk There continues to be a great deal of interest in the normal-superconducting phase transition of the cuprate superconductors, due in part to the accessibility of the critical regime 1 and also to the well-understood theories regarding the transition. 2 This interest has generated a large body of work regarding the phase transition in a magnetic field (the vortex-glass or Bose-glass transition). 3 This phase transition is generally accepted to exist, 4 though reserachers have found very different results for the critical exponents ν and z. 3 The existence of a vortex-glass transition has been debated by some, 5 and our own recent work has suggested a more precise criterion for determining the critical parameters if such a phase transition does indeed exist. 6 Much of the knowledge from the in-field transition carries over to the zero-field transition. This phase transition is less often studied, although paradoxically, the existence of this phase transition is not in doubt and the model that governs the phase transition is better understood. Like many other second-order phase transitions, the normal-superconducting phase transition in zero field is expected to obey the three-dimensional (3D) XY model with correlation length critical exponent ν = 0.67. If the dynamics are diffusive, then the expected dynamic critical exponent is z = 2. 2,7 However, there are widely varying experimental results in zero field. Researchers have studied the bulk properties of YBa 2 Cu 3 O 7−δ (YBCO), properties such as the specific heat, 8 thermal expansivity, 9 and transport in single crystals, 10 and have reported critical exponents similar to those of the 3D-XY model, while others have found both 3D-XY and mean field exponents (ν = 1 2 ) in crystals. 11 Transport measurements in thin-film YBCO have yielded exponents similar to those predicted by 3D-XY theory when extrapolating from high fields to zero field, 12 while measurements in low fields yield exponents larger than those expected from 3D-XY theory (ν ≈ 1.1, z ≈ 8.3). 13 Measurements on Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO), a similar hole-dop...

show abstract

Electrical Properties of Nanometer Materials

Zhang¹

2018

Physical Fundamentals of Nanomaterials

View full text Add to dashboard Cite

Zero-magnetic-field dynamic scaling inBi2Sr2CaCu2O8

Cited by 10 publications

References 33 publications

Nonmagnetic scattering induced suppression of superfluid density in Bi-2212

Nonmagnetic scattering induced suppression of superfluid density in Bi-2212

Effects of self field and low magnetic fields on the normal-superconducting phase transition

Electrical Properties of Nanometer Materials

Contact Info

Product

Resources

About