Order parameter anisotropy caused by the symmetry properties of coupling matrix element in two-band model of a superconductor

Arseyev, P. I.; Fedorov, N. K.; Volkov, B. A.

doi:10.1016/0038-1098(96)00460-7

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…S + D symmetry order parameters in the scheme basing on the Hamiltonian (1) have been investigated in [25]. We also mention that two hybridized bands with isotropic initial pairing can lead to order parameter nodes [26,27]. In [28], it has been shown that a two-band superconductor with isotropic gaps of opposite signs appearing due to repulsive interband pair-transfer interaction (a sign-reversed s wave superconductor), is similar to a d wave superconductor.…”

Section: The Model and Paired Carrier Effective Massmentioning

confidence: 99%

Paired Carrier Effective Mass Isotope Effect in the Two-Band Model

Örd

Kristoffel

1999

phys. stat. sol. (b)

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By modelling the two‐component scenario of high‐Tc superconductivity the isotope effect (β) in the supercarrier effective mass is calculated by a two‐band scheme with interband pair scattering. The behaviour of Tc, α and β in the underdoped region is illustrated. The repulsive interband interaction contains only a small electron–phonon contribution. The dependence of β (also of Tc, α) on doping is as observed [7], where β is larger.

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Section: The Model and Paired Carrier Effective Massmentioning

confidence: 99%

Paired Carrier Effective Mass Isotope Effect in the Two-Band Model

Örd

Kristoffel

1999

phys. stat. sol. (b)

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“…In [26] two hybridizing bands with isotropic intraband pairing interactions have been considered and the necessary presence of order parameter nodes has been found. Considering attractive pairing interaction within the planes and repulsive ones between planes and chains in the Y-123 system [27] nodes of the gap due to band anticrossing have been found, blending s-wave and d-wave features.…”

Section: Introductionmentioning

confidence: 99%

S + D Symmetry Order Parameters in Interband Superconductivity

Konsin

Kristoffel

Rubin

1998

phys. stat. sol. (b)

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The anisotropic order parameter case of the two-band superconductivity model with driving pair scattering between overlapping bands is investigated. The s d-type interaction used can lead to mixed and also pure d-or s-wave order parameters. The behaviour of T c and order parameter symmetry change with chemical potential are illustrated. Also the dependences of gap symmetry components on temperature and chemical potential have been obtained. The singularities in the electronic spectra are reflected in T c .

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