Quantum Phase Transitions in the Cuprate Superconductor Bi2Sr2−xLaxCuO6+δ
Yoichi Ando, S. Ono, X. F. Sun, J. Takeya, F. F. Balakirev, J. B. Betts, G. S. Boebinger
DOI 10.1103/PhysRevLett.92.247004 · Physical Review Letters
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Abstract
To elucidate a quantum phase transition (QPT) in Bi2Sr2−xLaxCuO6+δ, we measure charge and heat transport properties at very low temperatures and examine the following characteristics for a wide range of doping: normal-state resistivity anisotropy under 58 T, temperature dependence of the in-plane thermal conductivity κab, and the magnetic-field dependence of κab. It turns out that all of them show signatures of a QPT at the 1/8 hole doping. Together with the recent normal-state Hall measurements under 58 T that signified the existence of a QPT at optimum doping, the present results indicate that there are two QPTs in the superconducting doping regime of this material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2-xLaxCuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2-xLaxCuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 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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