Stability of exfoliated Bi$_2$Sr$_2$Dy$_x$Ca$_{1-x}$Cu$_2$O$_{8+\delta}$ studied by Raman microscopy

TL;DR

This study investigates the stability and properties of exfoliated Bi2Sr2Dy_xCa_{1-x}Cu2O_{8+δ} crystals using Raman microscopy, highlighting their potential for device applications and understanding of low-dimensional cuprates.

Contribution

It presents a method for producing and characterizing exfoliated cuprate crystals, analyzing their stability and differences from bulk materials using Raman microscopy.

Findings

Exfoliated crystals characterized by Raman and AFM microscopy.

Subtle differences identified between exfoliated and bulk crystals.

Procedures for handling and monitoring thin cuprate oxides established.

Abstract

Nanometer thick cuprates are an appealing platform for devices as well as exploring the roles of dimensionality, disorder, and free carrier density in these compounds. To this end we have produced exfoliated crystals of Bi2Sr2CaCu2O8 on oxidized silicon substrates. The exfoliated crystals were characterized via Atomic Force and polarized Raman microscopies. Proper procedures for production, handling and monitoring of these thin oxides are described. Subtle differences between the exfoliated and bulk crystals are also discussed.