Possible evidence of a two-gap structure for the CuxTiSe2 superconductor
Moran Zaberchik, Khanan Chashka, Larisa Patlgan, Ariel Maniv, Chris Baines, Philip King, Amit Kanigel
DOI 10.1103/PhysRevB.81.220505 · Physical Review B
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Abstract
We report a comprehensive transverse-field μSR study of CuxTiSe2. The magnetic penetration depth was found to saturate at low temperature as expected in an s-wave superconductor. As x is increased we find that the superfluid density increases and the size of the superconducting gap, calculated from the temperature dependence of the superfluid density, is approaching the BCS value. However, for low values of x, the gap is smaller than the weak-coupling BCS prediction suggesting that two superconducting gaps are present in the sample.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CuxTiSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.17 | Pressure not reported | unknown |
| Cu0.081TiSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.17 | Pressure not reported | unknown |
| Cu0.057TiSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | Pressure not reported | unknown |
| Cu0.044TiSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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