Pseudogap suppression by competition with superconductivity in La-based cuprates

DOI: 10.1103/PhysRevResearch.4.043015

Authors: J. Küspert (Universität Zürich) , R. Cohn Wagner (Universität Zürich) , C. Lin (Universität Zürich) , K. Von Arx (Universität Zürich; Chalmers University of Technology) , Q. Wang (Universität Zürich) , K. Kramer (University of Zurich) , W. R. Pudelko (Universität Zürich; Swiss Light Source) , N. C. Plumb (Swiss Light Source) , C. E. Matt (Universität Zürich; Swiss Light Source) , C. G. Fatuzzo (École Polytechnique Fedérale de Lausanne (EPFL)) , D. Sutter (University of Zurich) , Y. Sassa (Chalmers University of Technology) , J.-Q. Yan (Oak Ridge National Laboratory) , J.-S. Zhou (University of Texas at Austin) , J. B. Goodenough (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 (Diamond Light Source; DESY Photon Science) , C. Cacho (Diamond Light Source) , T. K. Kim (Diamond Light Source) , M. Horio (Universität Zürich) , J. Chang (Universität Zürich)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Research , VOL 4

State: Published (Approved)
Published: October 2022
Diamond Proposal Number(s): 27768 , 10550

Abstract: 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 La 2 − x Sr x CuO 4 , La 1.6 − x Nd 0.4 Sr x CuO 4 , and La 1.8 − x Eu 0.2 Sr x CuO 4 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.

Journal Keywords: Electronic structure; Cuprates; Angle-resolved photoemission spectroscopy

Subject Areas: Materials, Physics


Instruments: I05-ARPES

Other Facilities: SIS at SLS

Added On: 12/10/2022 09:37

Documents:
PhysRevResearch.4.043015.pdf

Discipline Tags:

Superconductors Quantum Materials Physics Hard condensed matter - structures Materials Science

Technical Tags:

Spectroscopy Angle Resolved Photoemission Spectroscopy (ARPES)