Pressure dependence of the superconducting phases in<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>

Trappmann, T.; Löhneysen, H. v.; Taillefer, Louis

doi:10.1103/physrevb.43.13714

Cited by 117 publications

(66 citation statements)

References 18 publications

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“…It is difficult to compare these predictions with the threee-dimensional phase diagram of Boukhny et al [44] quantitatively. The pressure dependence of the critical temperatures given by these authors is not in good agreement with that of Trappmann et al [41], which we used in plotting the figures. The behavior of the boundaries is quite sensitive to this dependence.…”

Section: Pressure Effectscontrasting

confidence: 47%

“…For P > P N , M = 0 and the pressure dependence of T c is entirely due to the coefficient α SP . Since dT c /dP = −11 mK/kbar in this region [41], we find α SP = α ST (11 mK/kbar). At P = 0 and T < T c1 , there is a competition between the purely magnetic terms and the coupling term f SM .…”

Section: Pressure Effectsmentioning

confidence: 99%

“…The only dependence on pressure in our theory of the phase diagram is through the quantity ∆T . We calculate ∆T at various pressures by taking T x (P = 0) and T y (P = 0) from our zero pressure fit, dT y /dP (recall T y > T x ), P N and dT c /dP (for P > P N ) from experimental data [41]. From T x (P = 0) and P N we can then find dT x /dP .…”

Section: Pressure Effectsmentioning

confidence: 99%

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E1gmodel of superconductingUPt3
Park
¹
,
Joynt
²

1996
Phys. Rev. B
23
2
33
0
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The phase diagram of superconducting UPt 3 is explained in a GinzburgLandau theory starting from the hypothesis that the order parameter is a pseudo-spin singlet which transforms according to the E 1g representation of the D 6h point group. We show how to compute the positions of the phase boundaries both when the applied field is in the basal plane and when it is along the c-axis. The experimental phase diagrams as determined by longitudinal sound velocity data can be fit using a single set of parameters. In particular the crossing of the upper critical field curves for the two field directions and the apparent isotropy of the phase diagram are reproduced. The former is a result of the magnetic properties of UPt 3 and their contribution to the free energy in the superconducting state. The latter is a consequence of an approximate particle-hole symmetry. Finally we extend the theory to finite pressure and show that, in contrast to other models, the E 1g model explains the observed pressure dependence of the phase boundaries.

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Section: Pressure Effectscontrasting

confidence: 47%

Section: Pressure Effectsmentioning

confidence: 99%

Section: Pressure Effectsmentioning

confidence: 99%

See 1 more Smart Citation

E1gmodel of superconductingUPt3
Park
¹
,
Joynt
²

1996
Phys. Rev. B
23
2
33
0
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“…The two superconducting transitions are reminiscent of the only other stoichiometric metal exhibiting this type of behaviour, UPt 3 , which displays a complex superconducting phase diagram as a function of magnetic field [13] and pressure [14]. We find that the double transition in PrOs 4 Sb 12 may no longer be resolved in 0.5 T, making more measurements necessary to establish the fate of the double transition in magnetic field.…”

mentioning

confidence: 95%

Low-Temperature Specific Heat of the Heavy-Fermion SuperconductorPrOs4Sb12

et al. 2003

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We report the magnetic field dependence of the low temperature specific heat of single crystals of the first Pr-based heavy fermion superconductor PrOs4Sb12. The low temperature specific heat and the magnetic phase diagram inferred from specific heat, resistivity and magnetisation provide compelling evidence of a doublet ground state and hence superconductivity mediated by quadrupolar fluctuations. This establishes PrOs4Sb12 as a very strong contender of superconductive pairing that is neither electron-phonon nor magnetically mediated.PACS numbers: 74.70. Tx, 7127,+a, 75.30.Mb Superconductivity mediated by a pairing potential other than a conventional electron-phonon interaction has been the subject of a very large number of theoretical and experimental investigations over the decades. In recent years, finally, intermetallic compounds have been discovered which, together with the high-T c cuprates, represent prime candidates for magnetically mediated pairing. Surprisingly, however, magnetically mediated pairing thus far has been considered the only serious alternative to electron-phonon mediated pairing, while excitonic and polaronic mechanisms have also been proposed.We have recently reported the discovery of the first Pr-based heavy fermion superconductor PrOs 4 Sb 12 [1], for which the nonmagnetic ground state appeared best described as a crystalline electric field (CEF) doublet. This in turn suggested that the heavy electron liquid is of quadrupolar origin and that consequently quadrupolar fluctuations mediate the superconductive pairing. PrOs 4 Sb 12 hence is a candidate for being the first material in which neither electron-phonon nor magnetic interactions mediate the pairing. However, a magnetic origin could not be completely ruled out [1] and recent low temperature specific heat measurements are reported to be consistent with a singlet CEF ground state hence questioning the hypothesis of quadrupolar pairing [2].In order to settle the question of the ground state and thus the possibility of the first example of quadrupolar mediated superconductive pairing demands definitive establishement of (i) the CEF level scheme, (ii) the unconventional nature of the superconductivity, and (iii) coupling of the CEF excitations to the conduction electrons. Here we report specific heat measurements of high quality single crystals of PrOs 4 Sb 12 at low T and high magnetic field. We show that the zero field data of the single crystals and the magnetic phase diagram as established from the specific heat, resistivity and magnetisation, as well as the observation of a novel high field ground state, provide compelling evidence of a nonmagnetic doublet CEF ground state intimately linked to the conduction electrons. This unambiguously establishes quadrupolar fluctuations as the most likely pairing mechanism. Moreover, we observe two superconducting transitions giving evidence of two distinct superconducting phases.Previous experiments on pressed pellets of tiny single crystals of PrOs 4 Sb 12 [1] revealed superconductivity ...

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“…Recently, we have measured the specific heat and electrical resistivity at the superconducting for the SMAF as the symmetry breaking field has been obtained by neutron-diffraction [25] and specific-heat [36] experiments under pressure. It was found that both m 2 and ∆T c are suppressed quasi-linearly with pressure and vanish at a critical pressure p c~ 0.35 GPa.…”

Section: Interplay Of Magnetism and Superconductivitymentioning

confidence: 99%

Neutron-diffraction study of the evolution of antiferromagnetic order inUPt3doped with Pd

et al. 1999

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Pressure dependence of the superconducting phases inUPt3

Cited by 117 publications

References 18 publications

E1gmodel of superconductingUPt3
Park
¹
,
Joynt
²

1996
Phys. Rev. B
23
2
33
0
View full text Add to dashboard Cite

E1gmodel of superconductingUPt3
Park
¹
,
Joynt
²

1996
Phys. Rev. B
23
2
33
0
View full text Add to dashboard Cite

Low-Temperature Specific Heat of the Heavy-Fermion SuperconductorPrOs4Sb12

Neutron-diffraction study of the evolution of antiferromagnetic order inUPt3doped with Pd

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Pressure dependence of the superconducting phases inUPt3

Cited by 117 publications

References 18 publications

E1gmodel of superconductingUPt3Park1, Joynt2 1996Phys. Rev. B232330View full textAdd to dashboardCite

E1gmodel of superconductingUPt3Park1, Joynt2 1996Phys. Rev. B232330View full textAdd to dashboardCite

Low-Temperature Specific Heat of the Heavy-Fermion SuperconductorPr﻿Os4Sb12

Neutron-diffraction study of the evolution of antiferromagnetic order inUPt3doped with Pd

Contact Info

Product

Resources

About

E1gmodel of superconductingUPt3
Park
¹
,
Joynt
²

1996
Phys. Rev. B
23
2
33
0
View full text Add to dashboard Cite

E1gmodel of superconductingUPt3
Park
¹
,
Joynt
²

1996
Phys. Rev. B
23
2
33
0
View full text Add to dashboard Cite

Low-Temperature Specific Heat of the Heavy-Fermion SuperconductorPrOs4Sb12