Absence of a BCS-BEC crossover in the cuprate superconductors

J Sous, Y He, SA Kivelson - npj Quantum Materials, 2023 - nature.com
We examine key aspects of the theory of the Bardeen–Cooper–Schrieffer (BCS) to Bose–
Einstein condensation (BEC) crossover, focusing on the temperature dependence of the …

Amperean pairing and the pseudogap phase of cuprate superconductors

PA Lee - Physical Review X, 2014 - APS
The enigmatic pseudogap phase in underdoped cuprate high-T c superconductors has long
been recognized as a central puzzle of the T c problem. Recent data show that the …

Disentangling Cooper-pair formation above the transition temperature from the pseudogap state in the cuprates

T Kondo, Y Hamaya, AD Palczewski, T Takeuchi… - Nature Physics, 2011 - nature.com
The discovery of the pseudogap in the cuprates,, created significant excitement as it was
believed to be a signature of pairing, in some cases above room temperature. Indeed, a …

Tunneling transport of unitary fermions across the superfluid transition

G Del Pace, WJ Kwon, M Zaccanti, G Roati, F Scazza - Physical Review Letters, 2021 - APS
We investigate the transport of a Fermi gas with unitarity-limited interactions across the
superfluid phase transition, probing its response to a direct current (dc) drive through a …

Spectroscopic Fingerprint of Phase-Incoherent Superconductivity in the Underdoped Bi2Sr2CaCu2O8+δ

J Lee, K Fujita, AR Schmidt, CK Kim, H Eisaki… - Science, 2009 - science.org
A possible explanation for the existence of the cuprate “pseudogap” state is that it is a d-
wave superconductor without quantum phase rigidity. Transport and thermodynamic studies …

High-field studies of superconducting fluctuations in high- cuprates: Evidence for a small gap distinct from the large pseudogap

F Rullier-Albenque, H Alloul, G Rikken - Physical Review B—Condensed …, 2011 - APS
We have used large pulsed magnetic fields up to 60 T to suppress the contribution of
superconducting fluctuations (SCFs) to the ab-plane conductivity above T c in a series of …

Temperature range of superconducting fluctuations above in YBaCuO single crystals

MS Grbić, M Požek, D Paar, V Hinkov, M Raichle… - Physical Review B …, 2011 - APS
Microwave absorption measurements in magnetic fields from 0 up to 16 T were used to
determine the temperature range of superconducting fluctuations above the …

Novel magnetic order in the pseudogap state of high- copper oxides superconductors

P Bourges, Y Sidis - Comptes Rendus. Physique, 2011 - comptes-rendus.academie-sciences …
Un des problèmes majeurs des oxydes de cuivre supraconducteurs à haute température
critique est l'origine de la phase pseudogap dans l'état sous-dopé. En utilisant des mesures …

Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-Tc …

K Fujita, A R. Schmidt, EA Kim, M J. Lawler… - Journal of the Physical …, 2011 - journals.jps.jp
One of the key motivations for the development of atomically resolved spectroscopic imaging
scanning tunneling microscopy (SI-STM) has been to probe the electronic structure of …

Phase fluctuations in two-dimensional superconductors and pseudogap phenomenon

XC Wang, Y Qi - Physical Review B, 2023 - APS
We study the phase fluctuations in the normal state of generic two-dimensional
superconducting systems with s-wave pairing. The effect of phase fluctuations of the pairing …