Observation of a Saddle-Point Singularity in Bi2(Sr0.97Pr0.03)2CuO6+δ and Its Implications for Normal and Superconducting State Properties
D. M. King, Z. -X. Shen, D. S. Dessau, D. S. Marshall, C. H. Park, W. E. Spicer, J. L. Peng, Z. Y. Li, R. L. Greene
DOI 10.1103/PhysRevLett.73.3298 · Physical Review Letters
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Abstract
We have mapped the Fermi surface (FS) of single-crystal Bi(Sr0.97Pr0.03)2CuO6+δ using angle-resolved photoemission. We find an extended saddle point at M¯ which is located very close to or at the Fermi level. This agrees with earlier photoemission data from the cuprates which reveals a striking correspondence between the position of the Fermi level relative to the saddle-point singularity and their normal state properties; however, it does not support the existence of a simple link to a high Tc. We also find that the FS is very strongly nested along the [110] direction.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2(Sr0.97Pr0.03)2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10 | Pressure not reported | unknown |
| Bi2(Sr0.97Pr0.03)2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+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 |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nd2-xCexCuO4 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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