Evidence for Line Nodes in the Superconducting Energy Gap of Noncentrosymmetric CePt3Si from Magnetic Penetration Depth Measurements

Ismardo Bonalde; Werner Brämer-Escamilla; Ernst Bauer

doi:10.1103/PhysRevLett.94.207002

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Evidence for Line Nodes in the Superconducting Energy Gap of Noncentrosymmetric CePt3Si from Magnetic Penetration Depth Measurements

Ismardo Bonalde, Werner Brämer-Escamilla, Ernst Bauer

DOI 10.1103/PhysRevLett.94.207002 · Physical Review Letters

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Abstract

We report measurements of the magnetic penetration depth λ(T) in high-quality CePt3Si samples down to 0.049 K. We observe a linear temperature dependence below T≃0.16Tc, which is interpreted as evidence for line nodes in the energy gap of the low-temperature phase of this material. A kink in λ(T) at about 0.53 K may be associated with the second superconducting transition recently reported. The results are discussed in terms of the symmetry of the superconducting order parameter.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.75	Pressure not reported	unknown
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.66	Pressure not reported	onset
Cd Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.52	Pressure not reported	unknown