Possibility of Coexistence of Bulk Superconductivity and Spin Fluctuations in U<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Pt</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Stewart, G. R.; Fisk, Z.; Willis, J.O.; Smith, James L.

doi:10.1103/physrevlett.52.679

Cited by 814 publications

(295 citation statements)

References 14 publications

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“…The low temperature resistivity at T c = 0.54 K is low, less than 1 rtf~cm, suggesting an electronic mean free path of several hundred hngstrrm. The specific heat anomaly at T c is only about 30% of BCS [12]. Measurements on materials prepared by various techniques suggest that this may be an intrinsic property and not the result of poor sample quality.…”

Section: Superconductivity Of Upt 3 and Ube 13mentioning

confidence: 99%

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Heavy fermion behavior in uranium compounds

Fisk

Smith

Ott³

et al. 1985

Journal of Magnetism and Magnetic Materials

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Section: Superconductivity Of Upt 3 and Ube 13mentioning

confidence: 99%

“…Measurements on materials prepared by various techniques suggest that this may be an intrinsic property and not the result of poor sample quality. We note that impurities have a drastic effect on T~ [12].…”

Section: Superconductivity Of Upt 3 and Ube 13mentioning

confidence: 99%

Heavy fermion behavior in uranium compounds

Fisk

Smith

Ott³

et al. 1985

Journal of Magnetism and Magnetic Materials

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“…The number of known triplet superconductors has been growing steadily, and now includes UPt 3 [21], ferromagnetic superconductors such as UGe 2 , URhGe, UIr and UCoGe [22][23][24], quasi one-dimensional organic system (TMTSF) 2 X (X=ClO 4 and PF 6 ) [25,26] and transition metal lithium oxide [27]. In particular, hallmarks for spin-triplet superconductivity have emerged for Sr 2 RuO 4 [28,29], for which the existence of high-quality single crystals allowed the study of heterostructures based on spin-triplet super- conductivity [30,31].…”

Section: Introductionmentioning

confidence: 99%

Magnetic manipulation of topological states in p-wave superconductors

Mercaldo

Cuoco

Kotetes

2018

Physica B: Condensed Matter

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Substantial experimental investigation has provided evidence for spin-triplet pairing in diverse classes of materials and in a variety of artificial heterostructures. A fundamental challenge in actual experiments is how to manipulate the topological behavior of p-wave superconductors (PSCs) that could open perspectives for applications. Such a control knob is naturally provided by the spintriplet character of the PSC order parameter, described by the spin d-vector. Therefore, in this work we investigate the magnetic field response of one-dimensional (1d) PSCs and demonstrate that the structure of the Cooper pair spin-configuration is crucial to set topological phases with an enhanced number of Majorana fermions per edge, N , ranging from N = 0 to 4. The topological phase diagram, consisting of phases with Majorana modes at the edge, becomes significantly modified when one tunes the strength of the applied field and allows for long range hopping amplitudes in the 1d PSC. We find transitions between phases with different number of Majorana fermions per edge that can be both induced by a variation of the hopping strength and a spin rotation of d. Hence, the interplay of the applied magnetic field and the internal spin degree of freedom of the PSC opens a new promising route for engineering topological phases with large number of Majorana modes.

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“…The two burning questions of physics were and remain (i) what is the nature of the heavy-fermion ground state and (ii) what is the nature of the mechanism leading to superconductivity and of the superconducting state itself in some such heavyfermion systems? Shortly after the UBe,, discovery, UPt, was found to be a heavy-fermion superconductor (at 0.5 K) with somewhat different properties [2]. We begin by reviewing the superconductivity of these two compounds.…”

mentioning

confidence: 99%

“…In contrast to UBe,,. the data here can be fitted with a T'ln T term [2] generally associated with ferromagnetic spin fluctuations.…”

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confidence: 99%