Magnetic susceptibility in the normal phase of Bi2Sr2CaCu2O8+δ single crystals

Lopes, L.F.; Peña, J. P.; Schaf, J.; Tumelero, Milton A.; Vieira, Vera Beatriz Guirland; Pureur, P.

doi:10.1016/j.physb.2017.09.002

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…Another possible evidence of competition among different electronic states in Bi-2212 comes from a study of the normal-phase susceptibility in the same set of samples investigated in the present work [31]. Those results showed that a maximum in the DOS occurs at p ∼ 0.16 and not at p ∼ 0.18.…”

Section: Resultssupporting

confidence: 53%

“…Several Bi 2 Sr 2 CaCu 2 O 8+δ single crystals were synthesized by the the auto-flux method following the procedure described in Ref. [31,32]. The crystals have the form of platelets with size between 1 -3 mm and thickness around 30 µm.…”

Section: Methodsmentioning

confidence: 99%

“…The crystals have the form of platelets with size between 1 -3 mm and thickness around 30 µm. The hole density of the as-grown crystals was modified by thermal treatments at fixed temperatures in vacuum or oxygen atmosphere to remove or add oxygen, respectively [31,32]. The quality and uniqueness of the crystallographic phase was probed, for each sample, by X-rays diffraction measurements performed with a SIEMENS D5000 diffractometer equipped with a cooper anode.…”

Section: Methodsmentioning

confidence: 99%

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Effects of the pseudo-gap on the field-induced kinetic energy density of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ single crystals

Lopes,

Peña,

Tumelero

et al. 2020

Preprint

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We report on magnetization experiments from which we obtain the field-induced kinetic energy density, E k , in the superconducting phase of several Bi2Sr2CaCu2O 8+δ single crystal samples. The kinetic energy magnitude changes according to the characteristic reduction of the single-electron density of states produced by the pseudogap in the underdoped limit. Moreover, a remarkable peak of E k occurring at the specific holes density p ∼ 0.18 is related to a van Hove singularity due to the pseudogap closure.We also extracted the superfluid density, ρs.We conclude that E k and ρs are related to the pseudogap energy scale. This result is understood as an evidence of the coexistence between superconductivity and the pseudogap phenomenon in the Bi2Sr2CaCu2O 8+δ cuprate compound.

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Section: Resultssupporting

confidence: 53%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Effects of the pseudo-gap on the field-induced kinetic energy density of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ single crystals

Lopes,

Peña,

Tumelero

et al. 2020

Preprint

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“…The temperature dependence of the DOS is due to the excitation of hole pairs or pairons [33,34] above T c , and their dissociation into quasiparticles [35,36]. The 'so-called' pseudogap deduced in previous works from the magnetic susceptibility [29,30,37] is in fact T max , the characteristic temperature of magnetic correlations. It is clearly distinct from T * , that is the onset temperature of a gap in the electronic DOS at the Fermi level.…”

Section: Introductionmentioning

confidence: 99%

Cuprates phase diagram deduced from magnetic susceptibility: what is the `true' pseudogap line?

Noat,

Mauger,

Nohara

et al. 2022

Preprint

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Two contradictory phase diagrams have dominated the literature of high-Tc cuprate superconductors. Does the pseudogap line cross the superconducting Tc-dome or not ? To answer, we have revisited the experimental magnetic susceptibility and knight shift of four different compounds, La1−xSrxCuO4, Bi2Sr2Ca1−xYxCu2O8, Bi2Sr2CaCu2O8+y, YBa2Cu3O6+y, as a function of temperature and doping. The susceptibility can be described by the same function for all materials, having a magnetic and an electronic contributions. The former is the 2D antiferromagnetic (AF) square lattice response, with a characteristic temperature of magnetic correlations Tmax. The latter is the 'Pauli' term, revealing the gap opening in the electronic density of states at the pseudogap temperature T * .From precise fits of the data, we find that Tmax(p) decreases linearly as a function of doping (p) over a wide range, but saturates abruptly in the overdoped regime. Concomitantly, T * (p) is linear and tangent to the dome, either crossing or approaching Tmax(p) at the top of the dome, indicating a qualitative change of behavior from underdoped to overdoped regimes.Contrary to the idea that the pseudogap terminates just above optimal doping, our analysis suggests that the gap exists throughout the phase diagram. It is consistent with a pseudogap due to hole pairs, or 'pairons', above Tc. We conclude that Tmax, reflecting the AF magnetic correlations, has often been misinterpreted as the pseudogap temperature T * .

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“…By doping the rare elements into BSCCO system, it will ensure to optimize the hole concentration, enhance the formation of Bi-2223 phase and pinning centers can be introduced for flux pinning application. Various doping elements has been analyzed by other researchers such as rare earth elements, oxides, alkali metals together with transitions elements [5,6]. There are slightly some changes shown in superconducting and magnetic properties in those research as a dopant concentration increases.…”

Section: Introductionmentioning

confidence: 99%

Effect of CeO<sub>2</sub> Nanoparticle on the Structural and Electrical Properties of BSCCO-2223 High Temperature Superconductor

Nurbaisyatul

Hashim

Kasim

et al. 2020

SSP

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A study of the effects of Cerium oxide nanoparticle doped with BSCCO-2223 on the microstructure and superconducting properties was carried out. All samples were synthesized using solid state reaction method. Ce concentration is varied from x = 0.0 up to 0.1 in a general stoichiometry of Bi1.6Pb0.4Sr2Ca1-xCexCu3Oy. The samples were characterized structurally and electrically by X-Ray Diffraction (XRD) and four-point probe method respectively. XRD analysis shows that both (Bi,Pb)-2212 and (Bi,Pb)-2223 phases coexist in the samples having tetragonal crystal structure but changed to orthorhombic when x=0.10. The values of critical transition temperature, TC and critical current density, JC of the samples decreased with the increase in Ce concentration. The possible reasons for the observed degradation in superconducting and structural properties of Bi-2223 due to Ce nanoparticles addition were discussed.

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Magnetic susceptibility in the normal phase of Bi2Sr2CaCu2O8+δ single crystals

Cited by 8 publications

References 14 publications

Effects of the pseudo-gap on the field-induced kinetic energy density of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ single crystals

Effects of the pseudo-gap on the field-induced kinetic energy density of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ single crystals

Cuprates phase diagram deduced from magnetic susceptibility: what is the `true' pseudogap line?

Effect of CeO<sub>2</sub> Nanoparticle on the Structural and Electrical Properties of BSCCO-2223 High Temperature Superconductor

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