Stationary Josephson current as a tool to detect charge density waves in high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si34.gif" overflow="scroll"><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> oxides

Gabovich, A. M.; Войтенко, А. И.; Li, Mai Suan; Szymczak, H.

doi:10.1016/j.physc.2015.06.014

Cited by 3 publications

(1 citation statement)

References 141 publications

(204 reference statements)

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“…The origin of two directionality factors cos θ and W(θ) was discussed earlier while studying both the quasiparticle and Josephson currents [11,145,147,[200][201][202][203][204][205][206][207]. The discussion of this issue will be continued in the next section.…”

Section: Quasiparticle Currents In Break Junctionsmentioning

confidence: 89%

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

Ekino¹,

Gabovich²,

Li³

et al. 2017

J. Phys.: Condens. Matter

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Quasiparticle tunnel conductance-voltage characteristics (CVCs), [Formula: see text], were calculated for break junctions (BJs) made up of layered d-wave superconductors partially gapped by charge-density waves (CDWs). The current is assumed to flow in the ab-plane of electrodes. The influence of CDWs is analyzed by comparing the resulting CVCs with CVCs calculated for BJs made up of pure d-wave superconductors with relevant parameters. The main CDW-effects were found to be the appearance of new CVC peculiarities and the loss of CVC symmetry with respect to the V-sign. Tunnel directionality was shown to be one of the key factors in the formation of [Formula: see text] dependences. In particular, the orientation of electrodes with respect to the current channel becomes very important. As a result, [Formula: see text] can acquire a large variety of forms similar to those for tunnel junctions between superconductors with s-wave, d-wave, and mixed symmetry of their order parameters. The diversity of peculiarities is especially striking at finite temperatures. In the case of BJs made up of pure d-wave superconductors, the resulting CVC can include a two-peak gap-driven structure. The results were compared with the experimental BJ data for a number of high-T oxides. It was shown that the large variety of the observed current-voltage characteristics can be interpreted in the framework of our approach. Thus, quasiparticle tunnel currents in the ab-plane can be used as an additional mean to detect CDWs competing with superconductivity in cuprates or other layered superconductors.

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Section: Quasiparticle Currents In Break Junctionsmentioning

confidence: 89%

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

Ekino¹,

Gabovich²,

Li³

et al. 2017

J. Phys.: Condens. Matter

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Break-junction tunneling spectra of Bi2212 superconducting ceramics: Influence of inhomogeneous d-wave-Cooper-pairing and charge-density-wave order parameters

Ekino

Gabovich

et al. 2020

Low Temperature Physics

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Conductance-voltage characteristics (CVCs) of tunnel break junctions made of Bi2Sr2CaCu2O8+δ crystals were measured. It was demonstrated that the CVCs have a V-shaped inner gap region, similar to those typical of CVCs for tunnel junctions between d-wave superconductors. The CVCs have different forms for different junctions, but all of them reveal weak dip-hump structures outside the inner gap region. Calculations of the tunnel current in the ab plane of the break junctions were carried out in the model of the inhomogeneous d-wave superconductor partially gapped by charge density waves (CDWs). The averaging of the tunnel current over the statistical distributions of both the superconducting and CDW order parameters was carried out. The theoretical results qualitatively reproduce the behavior of experimental curves. A conclusion was made that tunnel directionality and the statistical distributions of both order parameters are crucial factors governing the observed CVC shapes for break junctions made of high-Tc oxides.

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Coexistence of superconductivity and charge-density waves: evidence from tunneling studies (Review article)

Gabovich

Войтенко

Ekino

et al. 2023

Low Temperature Physics

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The review summarizes certain theoretical and experimental studies of the quasiparticle, J, and Josephson, IJ, currents between superconductors partially dielectrized with charge-density waves (CDWs). A relation between the Cooper and electron-hole pairings and their manifestations in high-Tc oxides have been analyzed. It was shown that the CDW fingerprints can be found in a lot of already observed dependences. All described results are considered in the framework of the historical context.

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Stationary Josephson current as a tool to detect charge density waves in high-Tc oxides

Cited by 3 publications

References 141 publications

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

Break-junction tunneling spectra of Bi2212 superconducting ceramics: Influence of inhomogeneous d-wave-Cooper-pairing and charge-density-wave order parameters

Coexistence of superconductivity and charge-density waves: evidence from tunneling studies (Review article)

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