Inductive measurements of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">UPt</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>in the superconducting state

Signore, P.J.C.; Andraka, B.; Meisel, Mark W.; Brown, Stuart; Fisk, Z.; Giorgi, A.L.; Smith, J. L.; Gross-Alltag, F.; Schuberth, E.; Menovsky, A.A.

doi:10.1103/physrevb.52.4446

Cited by 25 publications

(20 citation statements)

References 59 publications

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“…Signore et al [17] reported a linear temperature behavior which could not be associated with any specific component of the penetration depth. Interpretation of their ac-susceptibility measurements requires an analysis of the real and imaginary parts of the electromagnetic response from which extraction of the penetration depth is not trivial and is necessarily sensitive to surface quality [16,17]. An early μSR investigation by Broholm et al [18] found a penetration depth anisotropy much too small to be consistent with other observations of the superconducting state [3,21,22].…”

Section: Discussion and Summarymentioning

confidence: 96%

“…Our calculations using the quasiclassical Green's function approach and an ellipsoidal Fermi surface are consistent with the λ i (T) data over a wide range of temperature for an order parameter with E 2u symmetry. We compare our results for λ i (T) with those from other experimental methods including ac-susceptibility [16,17] and muon spin rotation (μSR) [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt₃

et al. 2015

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Spanning a broad range of physical systems, complex symmetry breaking is widely recognized as a hallmark of competing interactions. This is exemplified in superfluid 3 He which has multiple thermodynamic phases with spin and orbital quantum numbers S = 1 and L = 1, that emerge on cooling from a nearly ferromagnetic Fermi liquid. The heavy fermion compound UPt 3 exhibits similar behavior clearly manifest in its multiple superconducting phases. However, consensus as to its order parameter symmetry has remained elusive. Our small angle neutron scattering measurements indicate a linear temperature dependence of the London penetration depth characteristic of nodal structure of the order parameter. Our theoretical analysis is consistent with assignment of its symmetry to an L = 3 odd parity state for which one of the three thermodynamic phases in non-zero magnetic field is chiral.

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Section: Discussion and Summarymentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt₃

et al. 2015

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“…They found that such data agree with their own and that all the data were close to the local BCS prediction. More recently, Signore et al, 3 in a penetration depth study on UPt 3 where Al was used as a reference, reported that the temperature dependence of in pure Al fitted very well the nonlocal BCS expression in a vs T graph. However this result should be taken with care, because it can be shown that in this type of plot both the local and nonlocal BCS approximation can fit equally well the data.…”

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confidence: 86%

Evidence for nonlocality and the crossover from nonlocal to local behavior near the critical temperature in superconducting metals

et al. 2003

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We have performed high precision measurements of the temperature dependence of the magnetic penetration depth (T) in pure aluminum and cadmium samples. These superconductors and most of the other superconducting metals are predicted to be in the nonlocal limit of electrodynamics. However, most previous experimental works on (T) in Al reported large deviations from the expected nonlocal behavior. Here we present experimental data which agree remarkably well with theory, giving very strong evidence that nonlocal superconductivity indeed occurs in both Al and Cd. More strikingly, the cadmium data are consistent with the existence of the crossover from nonlocal to local behavior predicted to occur in all superconductors near T c .

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“…The temperature dependence of magnetic penetration depth λ has been investigated to determine the node structure of the order parameter of unconventional superconductors. A linear temperature dependence for UPt 3 is suggestive of line nodes [10], while a T 2 law for UBe 13 is ascribed to point nodes or the impurity effect [11]. In this paper, we have measured DC magnetization of UPt 3 to clarify the pressure dependence of λ.…”

Section: Introductionmentioning

confidence: 91%

“…In this paper, we have measured DC magnetization of UPt 3 to clarify the pressure dependence of λ. Although λ measurements are performed mostly by resonance techniques lately, λ of UPt 3 is reported to have frequency dependence [10] and DC magnetization can be measured easily in a high pressure cell by use of SQUID(Superconducting Quantum Interference Device). We have also measured the temperature dependence of λ for a polycrystal and a single crystal of UBe 13 to test how the T 2 dependence is affected by the sample quality.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Penetration Depth of UBe₁₃ and UPt₃ Derived by DC Magnetization Measurements

Sumiyama

Nagai

Ishii

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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DC magnetization of heavy-fermion superconductors UBe 13 and UPt 3 has been measured, and the magnetic penetration depth change ∆λ(T) = λ(T) − λ(T min), where T min is the lowest temperature, is derived. For UBe 13 , a single crystal and a polycrystal show a similar temperature dependence of ∆λ(T) that follows a T 2 law in the limited low-temperature range. When UPt 3 is measured under high pressure, a linear temperature dependence of ∆λ(T) is observed both below and above P c ∼ 0.4 GPa, above which an antiferromagnetic correlation disappears, while the increase rate above P c is about twice as large as that below P c , suggesting that the superconducting phase is modified above P c .

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Inductive measurements ofUPt3in the superconducting state

Cited by 25 publications

References 59 publications

Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt₃

Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt₃

Evidence for nonlocality and the crossover from nonlocal to local behavior near the critical temperature in superconducting metals

Magnetic Penetration Depth of UBe₁₃ and UPt₃ Derived by DC Magnetization Measurements

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Inductive measurements ofUPt3in the superconducting state

Cited by 25 publications

References 59 publications

Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt3

Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt3

Evidence for nonlocality and the crossover from nonlocal to local behavior near the critical temperature in superconducting metals

Magnetic Penetration Depth of UBe13 and UPt3 Derived by DC Magnetization Measurements

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Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt₃

Nodal gap structure and order parameter symmetry of the unconventional superconductor UPt₃

Magnetic Penetration Depth of UBe₁₃ and UPt₃ Derived by DC Magnetization Measurements