Circular dichroism and bilayer splitting in the normal state of underdoped (Pb,Bi)${}_2$Sr${}_2$(Ca${}_x$Y${}_{1-x}$)Cu${}_2$O${}_{8+\delta }$ and overdoped (Pb,Bi)${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

Abstract

We report an ARPES investigation of the circular dichroism in the first Brillouin zone (BZ) of under- and overdoped Pb-Bi2212 samples. We show that the dichroism has opposite signs for bonding and antibonding components of the bilayer-split CuO-band and is antisymmetric with respect to reflections in both mirror planes parallel to the c-axis. Using this property of the energy and momentum intensity distributions we prove the existence of the bilayer splitting in the normal state of the underdoped compound and compare its value with the splitting in overdoped sample. In agreement with previous studies the magnitude of the interlayer coupling does not depend significantly on doping. We also discuss possible origins of the observed dichroism.

4 RevTex pages, 4 EPS figures

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Cited by in corpus (14)

• Bare electron dispersion from photoemission experiments
• Self-consistent self-energy analysis of photoemission data
• Electrodynamics of the Nodal Metal in Weakly Doped High-$T_c$ Cuprates
• ARPES experiment in fermiology of quasi-2D metals (Review Article)
• Disentangling surface and bulk photoemission using circularly polarized light
• Parity of the Pairing Bosons in a High-Temperature Superconductor
• Distinct Superconducting Gap on Two Bilayer-Split Fermi Surface Sheets in $B{i}_{2}S{r}_{2}CaC{u}_2{O}_{8+\delta }$ Superconductor
• Optical Conductivity of Ortho-II YBa${}_2$Cu${}_3$O${}_6.5$
• Dual character of the electronic structure in YBa2Cu4O8: conduction bands of CuO2 planes and CuO chains
• Nonbonding oxygen holes and spinless scenario of magnetic response in doped cuprates
• Selective Hybridization between Main Band and Superstructure Band in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Superconductor
• Controlling the carrier concentration of the high temperature superconductor Bi2Sr2CaCu2O{8+x} in Angle Resolved Photoemission Spectroscopy (ARPES) experiments
• Life of the nodal quasiparticles in Bi-2212 as seen by ARPES
• Renormalization of electrons in bilayer cuprate superconductors