Origin of the Fermi arcs in cuprates: a dual role of quasiparticle and pair excitations
arXiv:1811.02280 · doi:10.1088/1361-648X/aae7af
Abstract
ARPES mesurements in cuprates have given key information on the temperature and angle dependence of the gap (-wave order parameter, Fermi arcs and pseudogap). We show that these features can be understood in terms of a Bose condensation of interacting {\it pairons} (preformed hole pairs which form in their local antiferromagnetic environment). Starting from the basic properties of the pairon wavefunction, we derive the corresponding k-space spectral function. The latter explains the variation of the ARPES spectra as a function of temperature and angle up to T*, the onset temperature of pairon formation. While Bose excitations dominate at the antinode, the fermion excitations dominate around the nodal direction, giving rise to the Fermi arcs at finite temperature. This dual role is the key feature distinguishing cuprate from conventional superconductivity.
8 pages, 7 figures
References in corpus (9)
- Scanning tunneling spectroscopy of high-temperature superconductors
- Distinct Fermi-Momentum Dependent Energy Gaps in Deeply Underdoped Bi2212
- Energy gaps in high-transition temperature cuprate superconductors
- Phase competition in trisected superconducting dome
- Pseudogap from ARPES experiment: three gaps in cuprates and topological superconductivity
- Spectroscopic evidence for preformed Cooper pairs in the pseudogap phase of cuprates
- Cooper pairs without 'glue' in high- superconductors
- Unconventional temperature dependence of the cuprate excitation spectrum
- From Cooper-pair glass to unconventional superconductivity: a unified approach to cuprates and pnictides