Superconductivity in uranium compounds

Минеев, В. П.

doi:10.1103/physrevb.90.064506

Cited by 14 publications

(20 citation statements)

References 28 publications

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“…In what follows we shall assume that the pressure dependences T c (P ) and T sc0 (P ) qualitatively correspond to the phase diagram with the intersection of the phase transition lines shown in Fig.1. One can note that the symmetry allows also the following interaction iγ 3 M (η ↑ η ↓ − η ↑ η ↓ ) between the superconducting and magnetic order parameters [13], but the general enough microscopic calculations [5,12] do not confirm the existence of this term.…”

Section: Modelmentioning

confidence: 99%

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Phase diagram of UCoGe

Минеев

2017

Phys. Rev. B

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The temperature-pressure phase diagram of ferromagnetic superconductor UCoGe includes four phase transitions. They are between the paramagnetic and the ferromagnetic states with the subsequent transition in the superconducting ferromagnetic state and between the normal and the superconducting states after which has to occur the transition to the superconducting ferromagnetic state. Here we have developed the Landau theory description of the phase diagram and established the specific ordering arising at each type of transition.The phase transitions to the ferromagnetic superconducting state are inevitably accompanied by the emergency of screening currents. The corresponding magnetostatics considerations allow to establish the significant difference between the transition from the ferromagnetic to the ferromagnetic superconducting state and the transition from the superconducting to the ferromagnetic superconducting state.

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Section: Modelmentioning

confidence: 99%

“…, which obey to coupled GinzburgLandau equations, derived in the linear approximation in the papers [5,12].k i = k i /|k|, i = x, y, z are the projections of the unitk vector on the coordinate axis.…”

Section: Modelmentioning

confidence: 99%

Phase diagram of UCoGe

Минеев

2017

Phys. Rev. B

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“…Magnetic susceptibilities along all directions are found as this has been done in 5,6 . In paramagnetic state they are:…”

Section: Susceptibilitiesmentioning

confidence: 99%

“…The spin-triplet pairing interaction is expressed through the odd part of the susceptibility components 5,6 :…”

Section: Susceptibilitiesmentioning

confidence: 99%

“…The problem of stimulation of triplet superconductivity in anisotropic ferromagnets by magnetic field perpendicular to spontaneous magnetization has been discussed by the present author 5,6 . This has allowed to explain the strong upturn of the upper critical field along b direction in UCoGe 7 by the increase of the pairing interaction caused by the suppression of the Curie temperature by magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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Reentrant superconductivity in URhGe

Минеев

2015

Phys. Rev. B

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There is presented a phenomenological description of phase diagram of ferromagnet superconductor URhGe. In frame of the Landau phenomenological theory it was found that phase transition between anisotropic ferromagnetic and paramagnetic states under strong enough magnetic field perpendicular to direction of easy magnetization changes from the second to the first order type. It is shown that magnetic susceptibility corresponding to longitudinal magnetic fluctuations strongly increases in vicinity of the first order transition stimulating reentrance of superconducting state. The reentrant superconductivity observed near the first order transition line at temperatures about twice lower than the tricritical point temperature exists both in ferromagnet and paramagnet state. The critical temperature of transition to superconducting state falls down at intersection with line of ferromagnet-paramagnet phase transition.

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