The interband interaction as a possible cause of high-temperature superconductivity

Konsin, P.; Kristoffel, N.; Örd, T.

doi:10.1016/0375-9601(88)90345-3

Cited by 51 publications

(36 citation statements)

References 17 publications

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“…We obtain the time-dependent Ginzburg-Landau equations for a two-band model [12] and we introduce the dimensionless order parameters …”

Section: Hamiltonian and Time-dependent Ginzburg-landau Equationsmentioning

confidence: 99%

“…Therefore, the numerical values of s r τ , are not obtained in [16]. In this paper a new approach for the calculation of relaxation times of order parameters in a two-band model [12][13][14] is suggested.…”

Section: Introductionmentioning

confidence: 97%

“…The two-component scenario supports also a number of results on a multicomponent order parameter, observations of two pairing scales [11], etc. In [12][13][14] the s-wave pairing in the two-band model, which reproduces the nodes in the gap connected with the single-band d-wave pairing, has been considered. In accordance with [12], the superconductivity is induced by an interband interaction (in which the interband Coulomb contribution dominates) and a remarkable volume of the Brillouin zone contributes to the pairing.…”

Section: Introductionmentioning

confidence: 99%

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Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y_1–xCa_xBa₂Cu₃O_7–δ

Konsin

Sorkin

2007

Physica Status Solidi (b)

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“…We obtain the time-dependent Ginzburg-Landau equations for a two-band model [12] and we introduce the dimensionless order parameters …”

Section: Hamiltonian and Time-dependent Ginzburg-landau Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y_1–xCa_xBa₂Cu₃O_7–δ

Konsin

Sorkin

2007

Physica Status Solidi (b)

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“…In [9], a mechanism of high-T, superconductivity based on repulsive interband interaction between the overlapping bands incorporating essential features of electronic structure of cuprate oxides, has been suggested.…”

Section: Introductionmentioning

confidence: 99%

Ginzburg‐Landau Equations and the Upper Critical Magnetic Field in Graphite Intercalation Compounds

Konsin

1995

Physica Status Solidi (b)

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The Ginzburg-Landau equations of a dirty two-band superconductor, where superconductivity is driven by the interband electron-phonon interaction are derived. On using these Ginzburg-Landau equations, the obtained formulas for the critical field H,, describe well the temperature and angular dependences of H,, in graphite intercalation compounds (GICs). The calculated Hij for C,K show a linear temperature dependence in a broad temperature range up to the values of the reduced temperature t = T /T, % 0.3 which is a general feature of GICs.

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“…The starting Hamiltonian is of the same form as in [6] (1) a~-k~ a:,_k,~ a:,,k,~ 9 ~,k,s ~,~' k,k' Here the electron band energies ~(k) are measured with respect to the chemical potential, the arrows indicate the spin (s) orientation, and the second term--the (*) Permanent address:…”

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confidence: 99%

The sign of interband interaction and stability of the superconducting ground state in the multiband model

1994

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(ricevuto il 25 Febbraio 1994; approvato il 12 Marzo 1994) Summary. --It is stressed that the stability of the superconducting ground state in the two-band model is guaranteed for both signs of the leading interband interaction W. Thereby the requirement for the energy minimum fixes the phase differences of two order parameters as I~1 -~21 = 0, 2= .... if W < 0 and t~1 -~21 = =, 3= .... if W > 0, and this difference is reflected in the ground-state wave function.PACS 63.90 -Other topics in lattice dynamics and crystal statistics.In the multiband models of superconductivity [1][2][3] it, is well known that the pairing may be achieved for both signs of the intei, band interactions [3,4]. For high-Te superconductors there is a number of new multiband approaches, see, e.g., review [5]. In the scheme developed in papers [6-8] the total leading interband interaction W, consisting of the Coulomb and the electron-phonon part, is assumed to be positive. In the multigap approach adopted in papers [9,10] the negative value of W leading to stable superconductive state has been emphasized [10] as a consequence of the assumption of a model exclusively relying upon electron-phonon interactions near the Fermi surface.The aim of the present note is to show that, regardless of the signature of W, the stability of the superconducting state can be guaranteed if the phase differences of the order parameters are properly fixed. For simplicity a two-band model is used.The starting Hamiltonian is of the same form as in [6] (1) a~-k~ a:,_k,~ a:,,k,~ 9 ~,k,s ~,~' k,k' Here the electron band energies ~(k) are measured with respect to the chemical potential, the arrows indicate the spin (s) orientation, and the second term--the (*) Permanent address:

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The interband interaction as a possible cause of high-temperature superconductivity

Cited by 51 publications

References 17 publications

Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y_1–xCa_xBa₂Cu₃O_7–δ

Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y_1–xCa_xBa₂Cu₃O_7–δ

Ginzburg‐Landau Equations and the Upper Critical Magnetic Field in Graphite Intercalation Compounds

The sign of interband interaction and stability of the superconducting ground state in the multiband model

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The interband interaction as a possible cause of high-temperature superconductivity

Cited by 51 publications

References 17 publications

Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y1–xCaxBa2Cu3O7–δ

Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y1–xCaxBa2Cu3O7–δ

Ginzburg‐Landau Equations and the Upper Critical Magnetic Field in Graphite Intercalation Compounds

The sign of interband interaction and stability of the superconducting ground state in the multiband model

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Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y_1–xCa_xBa₂Cu₃O_7–δ

Time‐dependent Ginzburg–Landau equations for a two‐band superconductor and the relaxation times of the order parameters in Y_1–xCa_xBa₂Cu₃O_7–δ