Two-Dimensional Localization and Superconductor-Insulator Transition in Strongly Underdoped Single Crystals of Y1−xPrxBa2Cu3O7−δ
G. A. Levin, T. Stein, C. C. Almasan, S. H. Han, D. A. Gajewski, M. B. Maple
DOI 10.1103/PhysRevLett.80.841 · 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
In-plane (ρab) and out-of-plane (ρc) normal state resistivities of insulating PrBa2Cu3O7−δ and superconducting Y0.47Pr0.53Ba2Cu3O7−δ (Tc≈18K) crystals have been measured using a “flux transformer” method. In the insulating sample we have found that ρc/ρab=a+bT−2/3 over two decades of temperature, which indicates two-dimensional localization. By suppressing the onset of superconductivity with a magnetic field, we have observed that low Tc Y1−xPrxBa2Cu3O7−δ is transformed into a 2D insulator with transport properties similar to those of PrBa2Cu3O7−δ.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y0.47Pr0.53Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | onset |
Similar papers
Anisotropic pressure dependence of the superconducting transition in YBa2Cu3O7−δ single crystals
similarity 0.94Zhang Dian-lin et al.
Source status unknown — claims are unverified
YBa2CU3O7/PrBa2Cu3O7 superlattices: Properties of Ultrathin superconducting layers separated by insulating layers
similarity 0.94J.-M. Triscone et al.
Source status unknown — claims are unverified
Coexistence of magnetism and superconductivity in ultraclean underdoped YBa2Cu3O6.37
similarity 0.94R. I. Miller et al.
Source status unknown — claims are unverified
Pinning effect on fluctuation conductivity in a superconducting untwinned YBa2Cu3O7−δ single crystal with columnar defects
similarity 0.94Jin-Tae Kim et al.
Source status unknown — claims are unverified
Anisotropic superconducting properties of YBa2Cu3O7−δ (δ=0.1 and 0.4) untwinned single crystals
similarity 0.94W. Bauhofer et al.
Source status unknown — claims are unverified
Measurements of fluctuation-induced diamagnetism above the superconducting transition in YBa2Cu3O7−δ single crystals in low magnetic fields: Comparison with paraconductivity
similarity 0.93C. Torrón et al.
Source status unknown — claims are unverified