Pressure dependence of the superconducting transition temperature and the Hall coefficient in IBi2.2Sr1.8CaCu2O8+y single crystals
Tongkai Huang, Mitsuru Itoh, Jianding Yu, Yoshiyuki Inaguma, Tetsurō Nakamura
DOI 10.1103/PhysRevB.49.9885 · Physical Review B
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Abstract
The superconducting transition temperature Tc and the Hall coefficient have been measured on IBi2.2Sr1.8CaCu2O8+y single crystals under hydrostatic pressure. The Tc linearly decreases at the rate dTc/dP∼-3.5 K/GPa, indicating the facts that the charge transfer occurs between intercalated iodine atoms and CuO2 layers, and the hole concentration situates in the overdoped region. The facts have been further identified by our Hall-coefficient measurements at ambient pressure, showing an increase of the hole concentration after intercalation. The number of holes transferred from intercalated iodine atoms was calculated to be 0.3 per iodine atom. The pressure derivative of the Hall coefficient is -0.39×10−3 cm3 C−1 GPa−1, which is approximately twice as large as the value on the pristine crystal, indicating the valence change of the intercalated iodine under pressure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| IBi2.2Sr1.8CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 83 | Pressure unresolved | onset |
| Bi2.2Sr1.8CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 83 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| IBi2Sr2CaCu2O8+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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