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Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped Sr3Ir2O7

Hunter, E. C.
Subedi, A.
Kim, T. K.
Hoesch, M.
Perry, R. S.
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Published in Physical Review Letters. 2014, vol. 113, 256402
Abstract 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.
Note 5 pages, 4 figures
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Research group Groupe Baumberger
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DE LA TORRE, Alberto et al. Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped Sr3Ir2O7. In: Physical Review Letters, 2014, vol. 113, p. 256402. doi: 10.1103/PhysRevLett.113.256402 https://archive-ouverte.unige.ch/unige:44945

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Deposited on : 2015-01-12

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