Triplet versus singlet superconductivity in quasi-one-dimensional conductors

Zhang, Wei; Melo, C. A. R. Sá de

doi:10.1080/00018730701403190

Cited by 22 publications

(28 citation statements)

References 217 publications

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“…In the organic superconductor (TMTSF) 2 PF 6 , H c2 (T ) displays pronounced upward curvature without saturation for two field directions perpendicular to c * at low temperatures [34]. This feature can be explained in terms of dramatic reduction of orbitally pair-breaking effect because of a field-induced dimension crossover [31]. As for iron-based superconductors, the anisotropy inversion appears accidentally (thus it is not ubiquitous) and, they tend to be isotropic (the anisotropy ratio approaches 1.0) at T → 0.…”

Section: A Hc2(t θ) Resultsmentioning

confidence: 88%

“…(7) The expected T c suppression by impurity scattering for non-s-wave superconductors is observed in the K 2 Cr 3 As 3 crystals prepared using impure Cr [28]. As is known, the H c2 behavior of a type-II superconductor may be an indicator for unconventional SC [29][30][31]. The temperature and angular dependence of H c2 reflect the mechanisms of Cooper-pair breaking due to an orbital and/or Zeeman effect.…”

Section: Introductionmentioning

confidence: 99%

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Temperature and angular dependence of the upper critical field in K2Cr3As3

et al. 2017

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We report measurements of the upper critical field Hc2 as functions of temperature T , polar angle θ (of the field direction with respect to the crystallographic c axis), and azimuthal angle φ (of the field direction relative to the a axis within the ab plane) for the Cr-based superconductor K2Cr3As3 with a quasi-one-dimensional and non-centrosymmetric crystal structure. We confirm that the anisotropy in Hc2(T ) becomes inverse with decreasing temperature. At low temperatures, Hc2(θ) data are featured by two maxima at θ = 0 (H c) and π/2 (H⊥c), which can be quantitatively understood only if uniaxial effective-mass anisotropy and absence of Pauli paramagnetic effect for H⊥c are taken simultaneously into consideration. The in-plane Hc2(φ) profile shows a unique threefold modulation especially at low temperatures. Overall, the characteristic of the Hc2(θ, φ, T ) data mostly resemble those of the heavy-fermion superconductor UPt3, and we argue a dominant spin-triplet superconductivity with odd parity in K2Cr3As3.

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Section: A Hc2(t θ) Resultsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Temperature and angular dependence of the upper critical field in K2Cr3As3

et al. 2017

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“…According to our results, the divergent character of the upper critical fields reported by transport measurements is a signature of superconducting fluctuations. Regarding the non saturating behavior of the upper critical field, the high field phase has been ascribed to a triplet state whereas the low field phase is assumed to be a singlet phase [4].…”

Section: Resultsmentioning

confidence: 99%

“…Low dimensional organic conductors have attracted sustained interest regarding their rich phase diagram showing almost all known ground states with particularly a superconducting phase next to a magnetic ordering [1][2][3][4][5], which is reminiscent of high-T c superconductors. This proximity is believed to result in a phase segregation consisting of an inhomogeneous coexistence of electronic states such as the nanoscale charge stripes observed in copper oxide [6].…”

Section: Introductionmentioning

confidence: 99%

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Inhomogeneous superconductivity in organic conductors: the role of disorder and magnetic field

Haddad¹,

Charfi‐Kaddour²,

Pouget³

2011

J. Phys.: Condens. Matter

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Several experimental studies have shown the presence of spatially inhomogeneous phase coexistence of superconducting and non superconducting domains in low dimensional organic superconductors. The superconducting properties of these systems are found to be strongly dependent on the amount of disorder introduced in the sample regardless of its origin. The suppression of the superconducting transition temperature Tc shows clear discrepancy with the result expected from the Abrikosov-Gor'kov law giving the behavior of Tc with impurities. Based on the time dependent Ginzburg-Landau theory, we derive a model to account for the striking feature of Tc in organic superconductors for different types of disorder by considering the segregated texture of the system. We show that the calculated Tc quantitatively agrees with experiments. We also focus on the role of superconducting fluctuations on the upper critical fields Hc2 of layered superconductors showing slab structure where superconducting domains are sandwiched by non-superconducting regions. We found that Hc2 may be strongly enhanced by such fluctuations.

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Synthesis and physical properties of the theoretically predicted spin-triplet superconductor Li0.9Mo6O17

Dong

Zhu

et al. 2021

Ceramics International

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Triplet versus singlet superconductivity in quasi-one-dimensional conductors

Cited by 22 publications

References 217 publications

Temperature and angular dependence of the upper critical field in K2Cr3As3

Temperature and angular dependence of the upper critical field in K2Cr3As3

Inhomogeneous superconductivity in organic conductors: the role of disorder and magnetic field

Synthesis and physical properties of the theoretically predicted spin-triplet superconductor Li0.9Mo6O17

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