Pseudogap suppression by competition with superconductivity in La-based cuprates
Journal article, 2022
We carried out a comprehensive high-resolution angle-resolved photoemission spectroscopy (ARPES) study of the pseudogap interplay with superconductivity in La-based cuprates. The three systems La2-xSrxCuO4, La1.6-xNd0.4SrxCuO4, and La1.8-xEu0.2SrxCuO4 display slightly different pseudogap critical points in the temperature versus doping phase diagram. We studied the pseudogap evolution into the superconducting state for doping concentrations just below the critical point. In this setting, near optimal doping for superconductivity and in the presence of the weakest possible pseudogap, we uncover how the pseudogap is partially suppressed inside the superconducting state. This conclusion is based on the direct observation of a reduced pseudogap energy scale and re-emergence of spectral weight suppressed by the pseudogap. Altogether these observations suggest that the pseudogap phenomenon in La-based cuprates is in competition with superconductivity for antinodal spectral weight.
Author
Julia Küspert
University of Zürich
R. Cohn Wagner
University of Zürich
C. Lin
University of Zürich
Karin von Arx
University of Zürich
Chalmers, Physics, Materials Physics
Q. Wang
University of Zürich
K. P. Kramer
University of Zürich
W. R. Pudelko
University of Zürich
Paul Scherrer Institut
N. C. Plumb
Paul Scherrer Institut
C. E. Matt
Paul Scherrer Institut
University of Zürich
C. G. Fatuzzo
Swiss Federal Institute of Technology in Lausanne (EPFL)
D. Sutter
University of Zürich
Yasmine Sassa
Chalmers, Physics, Materials Physics
J. Q. Yan
Oak Ridge National Laboratory
J. S. Zhou
The University of Texas at Austin
J. B. Goodenough
The University of Texas at Austin
S. Pyon
University of Tokyo
T. Takayama
University of Tokyo
H. Takagi
University of Tokyo
T. Kurosawa
Hokkaido University
N. Momono
Hokkaido University
Muroran Institute of Technology
M. Oda
Hokkaido University
M. Hoesch
Deutsches Elektronen-Synchrotron (DESY)
Diamond Light Source
C. Cacho
Diamond Light Source
T. K. Kim
Diamond Light Source
M. Horio
University of Zürich
J. Chang
University of Zürich
Physical Review Research
26431564 (ISSN)
Vol. 4 4 043015Subject Categories
Physical Chemistry
Astronomy, Astrophysics and Cosmology
Atom and Molecular Physics and Optics
DOI
10.1103/PhysRevResearch.4.043015