BCS-like superconductivity in the noncentrosymmetric compounds NbxRe1−x (0.13≤x≤0.38)

J. Chen; L. Jiao; J. L. Zhang; Y. Chen; L. Yang; M. Nicklas; F. Steglich; H. Q. Yuan

doi:10.1103/PhysRevB.88.144510

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BCS-like superconductivity in the noncentrosymmetric compounds NbxRe1−x (0.13≤x≤0.38)

J. Chen, L. Jiao, J. L. Zhang, Y. Chen, L. Yang, M. Nicklas, F. Steglich, H. Q. Yuan

DOI 10.1103/PhysRevB.88.144510 · Physical Review B

T1

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Abstract

We present research on the superconducting properties of NbxRe1−x (x=0.13–0.38) obtained by measuring the electrical resistivity ρ(T), magnetic susceptibility χ(T), specific heat CP(T), and London penetration depth Δλ(T). It is found that the superconducting transition temperature Tc decreases monotonically with an increase of x. The upper critical field Bc2(T) for various x can be nicely scaled by its corresponding Tc. The electronic specific heat Ce(T)/T, penetration depth Δλ(T), and superfluid density ρs(T) demonstrate exponential behavior at low temperatures and can be well fitted by a one-gap BCS model. The residual Sommerfeld coefficient γ0(B) in the superconducting state follows a linear field dependence. All these properties suggest an s-wave BCS-type of superconductivity with a very large Bc2(0) for NbxRe1−x (0.13≤x≤0.38).

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb0.18Re0.82 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8.9	Pressure not reported	midpoint
Nb0.18Re0.82 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8.9	Pressure not reported	midpoint
Nb0.18Re0.82 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8.9	Pressure not reported	midpoint
NbxRe1-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Li2Pd3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Li2Pt3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2C3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Y2C3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown