The free states-related Fermi pocket of cuprate superconductors
Tian De Cao
TL;DR
This paper investigates the origin of Fermi pockets in cuprate superconductors, linking them to free electron states and their effects on ARPES measurements, explaining differences between Bi2212 and Bi2201.
Contribution
It introduces a wave vector space analysis of pairing deviations from the Fermi level and connects Fermi pockets to free electron states affecting ARPES.
Findings
Fermi pocket related to free electron states in ARPES
Difference between Fermi arc and pocket explained by valence bandwidth and work function
Wave vector space analysis reveals pairing effects on Fermi surface features
Abstract
To stress the effect of the pairing position deviating from the Fermi level, we must investigate the pairs in the wave vector space, and then we use the dynamic equation to study some correlation functions. This article shows that the Fermi pocket is related to the effect of free electron states on the ARPES experiment. This also leads us to understand why the Fermi arc appears in Bi2212 while the Fermi pocket appears in Bi2201 with the valence bandwidth and the work function known for them.
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Taxonomy
TopicsPhysics of Superconductivity and Magnetism · Superconductivity in MgB2 and Alloys · Superconducting Materials and Applications