Superconductor-to-metal quantum phase transition in overdoped La2−xSrxCuO4
T. R. Lemberger, I. Hetel, A. Tsukada, M. Naito, M. Randeria
DOI 10.1103/PhysRevB.83.140507 · Physical Review B
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Abstract
We investigate Tc and magnetic penetration depth λ(T) near the superconductor-metal quantum phase transition in overdoped La2−xSrxCuO4 films. Both Tc and superfluid density ns,∝λ−2, decrease with overdoping. They obey the scaling relation Tc∝[λ−2(0)]α with α ≈ 1/2. We discuss this result in the frameworks of disordered d-wave superconductors and of scaling near quantum critical points. Our result, and the linear scaling (α ≈ 1) found for the more anisotropic Tl2Ba2CuO6+δ, can both be understood in terms of quantum critical scaling, with different dimensionalities for fluctuations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 44 | Pressure not reported | zero_resistance |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 44 | Pressure not reported | onset |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
| Tl2Ba2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-δ 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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