Electronic structure of La2−xSrxCuO4 in the vicinity of the superconductor-insulator transition
A. Ino, C. Kim, M. Nakamura, T. Yoshida, T. Mizokawa, Z.-X. Shen, A. Fujimori, T. Kakeshita, H. Eisaki, S. Uchida
DOI 10.1103/PhysRevB.62.4137 · Physical Review B
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Abstract
We report on the result of angle-resolved photoemission study of La2−xSrxCuO4 (LSCO) from an optimally doped superconductor (x=0.15) to an antiferromagnetic insulator (x=0). Near the superconductor-insulator transition x∼0.05, spectral weight is transferred with hole doping between two coexisting components, suggesting a microscopic inhomogeneity of the doped-hole distribution. For the underdoped LSCO (x<~0.12), the dispersive band crossing the Fermi level becomes invisible in the (0,0)−(π,π) direction unlike Bi2Sr2CaCu2O8+y. These observations may be reconciled with the evolution of holes in the insulator into fluctuating stripes in the superconductor.
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. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+y 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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