Pairing Symmetry, Nodal and Antinodal Superconducting Gap in $$\text {La}_{2-x}\text {Sr}_x\text {CuO}_{4}$$: A Doping Scenario

Verma, Sanjeev K.; Gupta, A.; Kumari, Anita; Indu, B. D.

doi:10.1007/s10909-019-02199-2

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“…We follow [7] arguments and use a pure order-parameter symmetry to model HTSCs. This expression has been used recently to study the doping dependence of the pairing symmetry in La 2-x Sr x CuO 4 [2,32]. Figure 1 shows the implicit plots for the Fermi surface , 0 (red violet shadowed region) and the line gap nodes Δ , 0 (orange lines) for the set of tight binding parameters of the previous paragraph.…”

Section: Introductionmentioning

confidence: 99%

Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T<sub>c</sub> Superconductors

Contreras¹,

Osorio²

2021

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Inspired by the studies on the influence of transition metal impurities in high Tc superconductors and what is already known about nonmagnetic suppression of T c in unconventional superconductors, we set out to investigate the behavior of the nonmagnetic disordered elastic scattering for a realistic 2D anisotropic high T c superconductor with line nodes and a Fermi surface in the tight-binding approximation. For this purpose, we performed a detailed self-consistent 2D numerical study of the disordered averaged scattering matrix with nonmagnetic impurities and a singlet line nodes order parameter, varying the concentration and the strength of the impurities potential in the Born, intermediate and unitary limits. In a high T c anisotropic superconductor with a tight binding dispersion law averaging over the Fermi surface, including hopping parameters and an order parameter in agreement with experimental data, the tight-binding approximation reflects the anisotropic effects. In this study, we also included a detailed visualization of the behavior of the scattering matrix with different sets of physical parameters involved in the nonmagnetic disorder, which allowed us to model the dressed scattering behavior in different regimes for very low and high energies. With this study, we demonstrate that the scattering elastic matrix is affected by the non-magnetic disorder, as well as the importance of an order parameter and a Fermi surface in agreement with experiments when studying this effect in unconventional superconductors.

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Section: Introductionmentioning

confidence: 99%

Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T<sub>c</sub> Superconductors

Contreras¹,

Osorio²

2021

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show abstract

Pairing Symmetry, Nodal and Antinodal Superconducting Gap in $$\text {La}_{2-x}\text {Sr}_x\text {CuO}_{4}$$: A Doping Scenario

Cited by 1 publication

References 80 publications

Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T<sub>c</sub> Superconductors

Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T<sub>c</sub> Superconductors

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Pairing Symmetry, Nodal and Antinodal Superconducting Gap in $$\text {La}_{2-x}\text {Sr}_x\text {CuO}_{4}$$: A Doping Scenario

Cited by 1 publication

References 80 publications

Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T&lt;sub&gt;c&lt;/sub&gt; Superconductors

Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T&lt;sub&gt;c&lt;/sub&gt; Superconductors

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Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T<sub>c</sub> Superconductors

Scattering Due to Non-magnetic Disorder in 2D Anisotropic d-wave High T<sub>c</sub> Superconductors