Nanoscale phase separation in deep underdoped Bi$_{2}$Sr$_{2}$CuO$_{6+δ}$ and Ca$_2$CuO$_2$Cl$_2$

Peter Mistark; Robert S. Markiewicz; Arun Bansil

doi:10.1103/PhysRevB.91.140501

paper

Nanoscale phase separation in deep underdoped Bi $_{2}$ Sr $_{2}$ CuO $_{6 + δ}$ and Ca $_{2}$ CuO $_{2}$ Cl $_{2}$

arXiv:1405.3992 · doi:10.1103/PhysRevB.91.140501

Abstract

We demonstrate that tunneling spectra in deeply underdoped Bi $_{2}$ Sr $_{2}$ CuO $_{6 + δ}$ (Bi2201) and Ca $_{2}$ CuO $_{2}$ Cl $_{2}$ (CCOC) provide clear evidence for nanoscale phase separation (NPS), causing the gap to fill with doping rather than close. The phase separation extends over a doping range from half filling to approximately $x \sim 0.09$ . Assuming the NPS is in the form of stripes, then the nodal gap -- which we model as a Coulomb gap -- arises from impurity pinning of the charged stripes, ultimately driving a metal-insulator transition.

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Cited by in corpus (3)

Energy gaps in high-transition temperature cuprate superconductors
First-Principles Calculation of Spin and Orbital Contributions to Magnetically Ordered Moments in Sr $_{2}$ IrO $_{4}$
Anomalous Nodal Gap in a Doped Spin-1/2 Antiferromagnetic Mott Insulator

Nanoscale phase separation in deep underdoped Bi2​Sr2​CuO6+δ​ and Ca2​CuO2​Cl2​

Abstract

References in corpus (12)

Cited by in corpus (3)

Nanoscale phase separation in deep underdoped Bi $_{2}$ Sr $_{2}$ CuO $_{6 + δ}$ and Ca $_{2}$ CuO $_{2}$ Cl $_{2}$