Effect of pressure on the superconductivity of Rb0.19WO3

Núñez-Regueiro, M.; Freitas, D. C.; Brusetti, R.; Marcus, J.

doi:10.1016/j.ssc.2013.01.012

Cited by 6 publications

(5 citation statements)

References 20 publications

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“…The curves are the self-consistent solutions of Eqs. (10) and (11). At zero hybridization V k between the bands, there are two critical temperatures,T c,a1 andT c,b1 .…”

Section: Obtention Of the Gap Equations For Symmetric Hybridizatmentioning

confidence: 99%

“…We plot in Fig. (11) the gap parameters with antisymmetric hybridization as a function of the temperature T , for a fixed α = 0.3, and various δµ. This curves allowed us to construct the phase diagram Tc versus δµ of the two-band model, which is depicted in Fig.…”

Section: Modelmentioning

confidence: 99%

“…Hybridization i.e., the mixing of atomic orbitals, plays an important role in the physics of multiband superconductors (see, for instance [9][10][11][12][13][14][15][16]). This seems to be also the case for MgB 2 .…”

Section: Introductionmentioning

confidence: 99%

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Finite temperature phase diagrams of a two-band model of superconductivity

Caldas¹,

Celes²,

Nozadze³

2018

Annals of Physics

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We explore the temperature effects in the superconducting phases of a hybridized two-band system. We show that for zero hybridization between the bands, there are two different critical temperatures. However, for any finite hybridization there is only one critical temperature at which the two gaps vanish simultaneously. We construct the phase diagrams of the critical temperature versus hybridization parameter α and critical temperature versus critical chemical potential asymmetry δµ between the bands, identifying the superconductor and normal phases in the system. We find an interesting reentrant behavior in the superconducting phase as the parameters α or δµ, which drive the phase transitions, increase. We also find that for optimal values of both α and δµ there is a significant enhancement of the critical temperature of the model.

show abstract

“…The curves are the self-consistent solutions of Eqs. (10) and (11). At zero hybridization V k between the bands, there are two critical temperatures,T c,a1 andT c,b1 .…”

Section: Obtention Of the Gap Equations For Symmetric Hybridizatmentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

See 1 more Smart Citation

Finite temperature phase diagrams of a two-band model of superconductivity

Caldas¹,

Celes²,

Nozadze³

2018

Annals of Physics

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show abstract

“…Consequently, the number of different gaps that arise in multi-orbital systems is directly related to the level of hybridization among the orbitals present in a given material [10]. In this way it turns out to be clear that hybridization plays an important role in the physics of multi-band superconductors [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A Two-band Model for p-wave Superconductivity

Caldas,

Batista,

Continentino

et al. 2017

Preprint

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In this paper we study the effects of hybridization in the superconducting properties of a twoband system. We consider the cases that these bands are formed by electronic orbitals with angular momentum, such that, the hybridization V (k) among them can be symmetric or antisymmetric under inversion symmetry. We take into account only intra-band attractive interactions in the two bands and investigate the appearance of an induced inter-band pairing gap. We show that (interband) superconducting orderings are induced in the total absence of attractive interaction between the two bands, which turns out to be completely dependent on the hybridization between them. For the case of antisymmetric hybridization we show that the induced inter-band superconductivity has a p-wave symmetry.

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“…Electronic states, either in the same or different sites may overlap and mix through the crystalline potential giving rise to hybrid bands. Superconductivity is strongly affected by hybridization [1][2][3][4][5][6][7]. In general this has a detrimental effect and can even destroy it at a superconducting quantum critical point (SQCP) [4].…”

Section: Introductionmentioning

confidence: 99%