Effects of Ca and Sr chemical doping on the average superconducting kinetic energy of YBa2Cu3O7-δ

Vieira, Vera Beatriz Guirland; Mendonça, A P A; Dias, F.T.; Hneda, Marlon Luiz; Pureur, P.; Schaf, J.; Mesquita, F.

doi:10.1088/1742-6596/592/1/012062

Cited by 3 publications

(1 citation statement)

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“…The study of E k has been useful to reveal the vortex dynamics of the superconducting condensate in different high temperature superconducting cuprates (HTSC) [27,28,29,30]. Here we show how the analysis of E k can also let us to indirectly investigate the nuances of the DOS at Fermi level and thus to obtain information on the pseudogap phenomenon from the inside of the superconducting phase.…”

Section: Introductionmentioning

confidence: 94%

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: Introductionmentioning

confidence: 94%