Superconductor-to-Insulator Transition and Transport Properties of Underdoped YBa2Cu3Oy Crystals
Kouichi Semba, Azusa Matsuda
DOI 10.1103/PhysRevLett.86.496 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The carrier-concentration-driven superconductor-to-insulator (SI) transition as well as transport properties in underdoped YBa2Cu3Oy twinned crystals is studied. The SI transition takes place at y≃6.3, carrier concentration nHSI≃3×1020cm−3, anisotropy ρc/ρab≃103, and the threshold resistivity ρabSI∼0.8mΩcm which corresponds to a critical sheet resistance h4e2≃6.5kΩ per CuO2 bilayer. The evolution of a carrier, nH∝y−6.2, is clearly observed in the underdoped region. The resistivity and Hall coefficient abruptly acquire strong temperature dependence at y≃6.5 indicating a radical change in the electronic state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O6.38 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu1-zZnz3O6.63 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCu1-zZnzO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Electronic Inhomogeneity and Breakdown of the Universal Thermal Conductivity of Cuprate Superconductors
similarity 0.96X. F. Sun et al.
Source status unknown — claims are unverified
Berry phase in cuprate superconductors
similarity 0.95N. Doiron-Leyraud et al.
Source status unknown — claims are unverified
Scaling of the normal-state Nernst coefficient in doped Y-based high-temperature superconductors
similarity 0.95V. E. Gasumyants & N. V. Ageev
Source status unknown — claims are unverified
I-V characteristics and the superconducting transition in polycrystalline YBa2Cu3O7−δ
similarity 0.95W. M. Tiernan et al.
Source status unknown — claims are unverified
Influence of inelastic effects on differential conductance of a high-Tc superconductor/metal junction
similarity 0.95M. Grajcar et al.
Source status unknown — claims are unverified
Low-angle resistivity anomaly in layered superconductors
similarity 0.95A. E. Koshelev & V. M. Vinokur
Source status unknown — claims are unverified