Strain-amplified structural modulation of Bi-cuprate high-Tc superconductors
Satoru Kaneko, Kensuke Akiyama, Hiroshi Funakubo, Mamoru Yoshimoto
DOI 10.1103/PhysRevB.74.054503 · Physical Review B
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Abstract
Two dimensional x-ray images of a multilayered bismuth high-temperature superconductor (HTS) together with reciprocal-space simulation have shown how unit cells are distorted to form “supercells,” the structural modulation consisting of multiple unit cells with incommensurate modulation period in a HTS. Strain induced by the multilayered structure alters the lattice mismatch between bismuth and perovskite blocks, resulting in increased supercell distortion described by the amplitude in the modulation wave. While oxygen content affects the modulation period of the supercell, lattice mismatch dominates the displacement of each atom from its position in the perfect crystal to construct the distorted structure, the supercell.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | zero_resistance |
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