Scientific article
Open access

Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped Sr3Ir2O7

Published inPhysical review letters, vol. 113, 256402
Publication date2014

We characterize the electron doping evolution of (Sr1−xLax)3Ir2O7 by means of angle-resolved photoemission. Concomitant with the metal insulator transition around x≈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≈0.5 in lightly doped Sr3Ir2O7.

  • arxiv : cond-mat.str-el
Note5 pages, 4 figures
Research group
Citation (ISO format)
DE LA TORRE, Alberto et al. Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped Sr<sub>3</sub>Ir<sub>2</sub>O<sub>7</sub>. In: Physical review letters, 2014, vol. 113, p. 256402. doi: 10.1103/PhysRevLett.113.256402
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Article (Published version)
ISSN of the journal0031-9007

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