Pseudogap suppression by competition with superconductivity in La-based cuprates
Artikel i vetenskaplig tidskrift, 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.
Författare
Julia Küspert
Universität Zürich
R. Cohn Wagner
Universität Zürich
C. Lin
Universität Zürich
Karin von Arx
Chalmers, Fysik, Materialfysik
Universität Zürich
Q. Wang
Universität Zürich
K. P. Kramer
Universität Zürich
W. R. Pudelko
Universität Zürich
Paul Scherrer Institut
N. C. Plumb
Paul Scherrer Institut
C. E. Matt
Universität Zürich
Paul Scherrer Institut
C. G. Fatuzzo
Ecole Polytechnique Federale de Lausanne (EPFL)
D. Sutter
Universität Zürich
Yasmine Sassa
Chalmers, Fysik, Materialfysik
J. Q. Yan
Oak Ridge National Laboratory
J. S. Zhou
University of Texas
J. B. Goodenough
University of Texas
S. Pyon
University of Tokyo
T. Takayama
University of Tokyo
H. Takagi
University of Tokyo
T. Kurosawa
Hokkaido University
N. Momono
Muroran Institute of Technology
Hokkaido University
M. Oda
Hokkaido University
M. Hoesch
Diamond Light Source
Deutsches Elektronen-Synchrotron (DESY)
C. Cacho
Diamond Light Source
T. K. Kim
Diamond Light Source
M. Horio
Universität Zürich
J. Chang
Universität Zürich
Physical Review Research
26431564 (ISSN)
Vol. 4 4 043015Ämneskategorier (SSIF 2011)
Fysikalisk kemi
Astronomi, astrofysik och kosmologi
Atom- och molekylfysik och optik
DOI
10.1103/PhysRevResearch.4.043015