Out-of-plane dielectric constant and insulator-superconductor transition in Bi_2Sr_2Dy_{1-x}Er_xCu_2O_8 single crystals

Abstract

The out-of-plane dielectric constant of the parent insulator of the high-temperature superconductor Bi_2Sr_2(Dy,Er)Cu_2O_8 was measured and analysed from 80 to 300 K in the frequency range of 10^6-10^9 Hz. All the samples were found to show a fairly large value of 10-60, implying some kind of charge inhomogeneity in the CuO_2 plane. Considering that the superconducting sample Bi_2Sr_2(Ca,Pr)Cu_2O_8 also shows a similar dielectric constant, the charge inhomogeneity plays an important role in the insulator-superconductor transition.

RevTex4 format, 5 pages, 3 figures, submitted to J. Phys. Condens. Mat

References in corpus (3)

• Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
• Colossal Effects in Transition Metal Oxides Caused by Intrinsic Inhomogeneities
• Inherent Inhomogeneities in Tunneling Spectra of BSCCO Crystals in the Superconducting State

Cited by in corpus (4)

• Anomalous dielectric response in the dimer Mott insulator $\kappa$-(BEDT-TTF)${}_2$Cu${}_2$(CN)${}_3$
• Thermoelectric properties of the layered Pd oxide R_2PdO_4 (R = La, Nd, Sm and Gd)
• Dynamic charge order from strong correlations in the cuprates
• Charge transport of Bi_{2-x}Pb_xSr_2ErCu_2O_8 single crystals near the insulator-superconductor transition