188 citations · 1.9k across the 72 of their papers we have counts for
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The Pseudogap Challenge: Understanding the ab-Plane AC Conductivity below Tc
Andrew Iyengar, Jelena Stajic, Ying-Jer Kao +1
We establish that the cuprate pseudogap plays a crucial role in the -plane optical conductivity for temperatures . The pseudogap signatures in asso…
Pair-breaking effects in the Pseudogap Regime: Application to High Temperature Superconductors
Ying-Jer Kao, Andrew P. Iyengar, Jelena Stajic +1
Abrikosov-Gor'kov (AG) theory, the foundation for understanding pair-breaking effects in conventional superconductors, is inadequate when there is an excitation gap (pseudogap) pre…
Magnetic field effects on and the pseudogap onset temperature in cuprate superconductors
Qijin Chen, Ying-Jer Kao, Andrew P. Iyengar +1
We study the sensitivity of and the pseudogap onset temperature, , to low fields, , for cuprate superconductors, using a BCS-based approach extended to arbitrary coup…
Origin of the pseudogap phase: Precursor superconductivity versus a competing energy gap scenario
K. Levin, Qijin Chen, Ioan Kosztin +3
In the last few years evidence has been accumulating that there are a multiplicity of energy scales which characterize superconductivity in the underdoped cuprates. In contrast to…
Frequency Evolution of Neutron Peaks Below Tc: Commensurate and Incommensurate Structure in LaSrCuO and YBaCuO
Ying-Jer Kao, Qimiao Si, K. Levin
We study the evolution of the neutron cross-section with variable frequency and fixed below in two different cuprate families. Our calculations, which predominantly p…
Pair Excitations, Collective Modes and Gauge Invariance in the BCS -- Bose-Einstein Crossover Scenario
Ioan Kosztin, Qijin Chen, Ying-Jer Kao +1
In this paper we study the BCS Bose Einstein condensation (BEC) crossover scenario within the superconducting state, using a T-matrix approach which yields the ground state propose…