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Coherent quasiparticles with a small fermi surface in lightly doped Sr3Ir2O7

DOI: 10.1103/PhysRevLett.113.256402 DOI Help
PMID: 25554897 PMID Help

Authors: A. De La Torre (University of Geneva) , E. C. Hunter (University of Edinburgh) , A. Subedi (École Polytechnique, CNRS) , S. Mckeown Walker (University of Geneva) , A. Tamai (University of Geneva) , T. K. Kim (Diamond Light Source) , M. Hoesch (Diamond Light Source) , R. S. Perry (University College London) , A. Georges (University of Geneva) , F. Baumberger (University of Geneva)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 113 (25) , PAGES 22D506

State: Published (Approved)
Published: December 2014

Abstract: We characterize the electron doping evolution of (Sr [1-X] La[x])3Ir2O7 by means of angle-resolved photoemission. Concomitant with the metal insulator transition around x approximately equal to 0.05 we find the emergence of coherent quasiparticle states forming a closed small Fermi surface of volume 3x/2, where x is the independently measured La concentration. The quasiparticle weight Z remains large along the entire Fermi surface, consistent with the moderate renormalization of the low-energy dispersion, and no pseudogap is observed. This indicates a conventional, weakly correlated Fermi liquid state with a momentum independent residue Z approximately equal to 0.5 in lightly doped Sr3Ir2O7.

Subject Areas: Physics, Materials

Instruments: I05-ARPES

Added On: 09/01/2015 18:27

Discipline Tags:

Quantum Materials Physics Hard condensed matter - structures Materials Science

Technical Tags:

Spectroscopy Angle Resolved Photoemission Spectroscopy (ARPES)