Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped Sr3Ir2O7

De La Torre, Alberto; Hunter, E. C.; Subedi, A.; Mckeown Walker, Siobhan; Tamai, Anna; Kim, T. K.; Hoesch, M.; Perry, R. S.; Georges, Antoine; Baumberger, Felix

doi:10.1103/PhysRevLett.113.256402

Scientific article

English

Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped Sr₃Ir₂O₇

Contributors

De La Torre, Alberto; Hunter, E. C.; Subedi, A.; Mckeown Walker, Siobhan; Tamai, Anna

; Kim, T. K.; Hoesch, M.; Perry, R. S.; Georges, Antoine; Baumberger, Felix

Published in

Physical review letters, vol. 113, 256402

Publication date

2014

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.

Classification

arxiv : cond-mat.str-el

Note

5 pages, 4 figures

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique de la matière quantique

UNIGE research groups

Groupe Baumberger

Citation (ISO format)

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

Article (Published version)

Identifiers

PID : unige:44945
DOI : 10.1103/PhysRevLett.113.256402

Journal ISSN

0031-9007

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Creation

07/01/2015 17:17:00

First validation

07/01/2015 17:17:00

Update

13/10/2025 21:56:52

Status update

14/03/2023 22:38:45

Last indexation

21/09/2026 12:37:13