Point-contact study of the heavy-fermion system URu2Si2

Nowack, A.; Naǐdyuk, Yu. G.; Chubov, P. N.; Yanson, I. K.; Menovsky, A.A.

doi:10.1007/bf01470916

Cited by 46 publications

(28 citation statements)

References 18 publications

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“…As far as URu Si is concerned, the SDW gap at 60 cm\ was also clearly identified with point contact spectroscopy (PCS) measurements. These experimental findings are suggestive of a BCS-like SDW gap in the density of states (DOS) below T , [32,47,48]. This interpretation is analogous to what has been suggested for Cr [25].…”

Section: A) U Zn and Upd Alsupporting

confidence: 78%

The electrodynamic response of heavy-electron materials with magnetic phase transitions

et al. 1997

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Section: A) U Zn and Upd Alsupporting

confidence: 78%

The electrodynamic response of heavy-electron materials with magnetic phase transitions

et al. 1997

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“…It must be emphasized that this structure was observed only for PCs which did not exhibit a pronounced (up to ∼ 10 % of R(0)) maximum of (dV /dI) sym between ±10 mV, usually associated with an SDW gap formed on part of the Fermi surface of URu 2 Si 2 below the onset of AF order [8], [11]. This is illustrated in the inset of fig.…”

mentioning

confidence: 99%

Anisotropy of the superconducting energy gap in URu ₂ Si ₂ studied by point-contact spectroscopy

et al. 1996

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The differential resistance dV /dI vs. applied voltage V for URu2Si2-normal-metal point-contacts (PCs) is investigated. For some PCs a clear double-minimum structure is observed in dV /dI vs. V at zero bias well below the superconducting critical temperature Tc as expected for the Andreev reflection. The double minimum occurs only for PCs with suppressed antiferromagnetic (AF) features in dV /dI, in support of a recent model of the gap depression by AF order in the (a, b)-plane of tetragonal URu2Si2. A strong anisotropy of the reduced gap 2∆/kTc and of Bc2 for PCs along the a and the c axis is also observed.

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“…The absence of a superconducting anomaly has also been reported for URu 2 Si 2 , especially in high-resistance contacts [22,23], and ascribed to the normalconducting layer near the surface of URu 2 Si 2 . One possible origin of such a layer is the deformation in the contact region and it probably occurs in CePt 3 Si as well.…”

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Point-contact spectroscopy of the heavy-fermion superconductor CePt₃Si

Onuki

Sumiyama

Oda

et al. 2009

J. Phys.: Condens. Matter

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Abstract. Differential resistance spectra (dV /dI − V characteristics) have been measured for point-contacts between the heavy-fermion superconductor (HFS) CePt 3 Si and a normal metal. Some contacts show a peak at V = 0 that is characteristic of HFS coexisting with a magnetic order such as UPd 2 Al 3 , UNi 2 Al 3 and URu 2 Si 2 . The evolution of the peak occurs well above the antiferromagnetic transition temperature T N ∼ 2.2 K, so that the direct relationship with the magnetic transition is questionable. The half-width of the peak seems to reflect the crystal field splitting or the spin-wave gap as observed for the above-mentioned HFSs, possibly suggesting that some common scattering process induces the zerobias peaks in these materials.

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Point-contact study of the heavy-fermion system URu2Si2

Cited by 46 publications

References 18 publications

The electrodynamic response of heavy-electron materials with magnetic phase transitions

The electrodynamic response of heavy-electron materials with magnetic phase transitions

Anisotropy of the superconducting energy gap in URu ₂ Si ₂ studied by point-contact spectroscopy

Point-contact spectroscopy of the heavy-fermion superconductor CePt₃Si

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Point-contact study of the heavy-fermion system URu2Si2

Cited by 46 publications

References 18 publications

The electrodynamic response of heavy-electron materials with magnetic phase transitions

The electrodynamic response of heavy-electron materials with magnetic phase transitions

Anisotropy of the superconducting energy gap in URu 2 Si 2 studied by point-contact spectroscopy

Point-contact spectroscopy of the heavy-fermion superconductor CePt3Si

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Product

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Anisotropy of the superconducting energy gap in URu ₂ Si ₂ studied by point-contact spectroscopy

Point-contact spectroscopy of the heavy-fermion superconductor CePt₃Si