Bogoliubov Angle, Particle-Hole Mixture and Angular Resolved Photoemission Spectroscopy in Superconductors

Abstract

Superconducting excitations -- Bogoliubov quasiparticles -- are the quantum mechanical mixture of negatively charged electron (-e) and positively charged hole (+e). We propose a new observable for Angular Resolved Photoemission Spectroscopy (ARPES) studies that is the manifestation of the particle-hole entanglement of the superconducting quasiparticles. We call this observable a {\em Bogoliubov angle}. This angle measures the relative weight of particle and hole amplitude in the superconducting (Bogoliubov) quasiparticle. We show how this quantity can be measured by comparing the ratio of spectral intensities at positive and negative energies.

4 pages latex with 76 eps figure files

References in corpus (4)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Hidden Order in the Cuprates
• BCS-like Bogoliubov Quasiparticles in High-Tc Superconductors Observed by Angle-Resolved Photoemission Spectroscopy
• Bogoliubov angle and visualization of particle-hole mixture in superconductors

Cited by in corpus (10)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Electronic structure of cuprate superconductors in a full charge-spin recombination scheme
• Experimental evidence of anomalously large superconducting gap on topological surface state of $\beta$-$\mathbf{B}{\mathbf{i}}_2\mathbf{Pd}$ film
• Hybridization of Bogoliubov-quasiparticles between adjacent CuO${}_2$ layers in the triple-layer cuprate Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$ studied by ARPES
• Extraction of Electron Self-Energy and Gap Function in the Superconducting State of Bi_2Sr_2CaCu_2O_8 Superconductor via Laser-Based Angle-Resolved Photoemission
• Unconventional particle-hole mixing in the systems with strong superconducting fluctuations
• Momentum-resolved spectroscopy of superconductivity with the quantum twisting microscope
• Towards the issue of the origin of Fermi surface, pseudogaps and Fermi arcs in cuprate HTSCs
• "Half-Bogoliubons" as the intermediate states for the phase coherence in underdoped cuprates
• Fermi arcs and the nature of carriers in cuprate HTSC