RT Journal Article
T1 Fermi surface and pseudogap in highly doped Sr2IrO4
A1 Alexanian, Y.
A1 Torre, A. de la
A1 Walker, S. McKeown
A1 Straub, M.
A1 Gatti, G.
A1 Hunter, A.
A1 Mandloi, S.
A1 Cappelli, E.
A1 Riccò, S.
A1 Bruno, Flavio Yair
A1 Radovic, M.
A1 Plumb, N. C.
A1 Shi, M.
A1 Osiecki, J.
A1 Polley, C.
A1 Kim, T. K.
A1 Dudin, P.
A1 Hoesch, M.
A1 Perry, R. S.
A1 Tamai, A.
A1 Baumberger, F.
AB The fate of the Fermi surface in bulk electron-doped Sr2IrO4 remains elusive, as does the origin and extension of its pseudogap phase. Here, we use high-resolution angle-resolved photoelectron spectroscopy (ARPES) to investigate the electronic structure of Sr2−xLaxIrO4 up to x = 0.2, a factor of two higher than in previous work. We find that the antinodal pseudogap persists up to the highest doping level, and thus beyond the sharp increase in Hall carrier density to ≃ 1 + x recently observed above x* ≃ 0.161. This suggests that doped iridates host a unique phase of matter in which a large Hall density coexists with an anisotropic pseudogap, breaking up the Fermi surface into disconnected arcs. The temperature boundary of the pseudogap is T* ≃ 200 K for x = 0.2, comparable to cuprates and to the energy scale of short range antiferromagnetic correlations in cuprates and iridates.
PB Springer Nature
YR 2025
FD 2025-10-03
LK https://hdl.handle.net/20.500.14352/124674
UL https://hdl.handle.net/20.500.14352/124674
LA eng
NO Alexanian, Y., de la Torre, A., McKeown Walker, S. et al. Fermi surface and pseudogap in highly doped Sr2IrO4. npj Quantum Mater. 10, 100 (2025). https://doi.org/10.1038/s41535-025-00817-9
NO ©TheAuthor(s) 2025.Proposals 146995, 165791, 184998Proposals 20220192 and 202316002018-071522018-049692019-0249
NO Swiss National Science Foundation
NO Swedish Research Council
NO Swedish Governmental Agency for Innovation Systems
DS Docta Complutense
RD 18 mar 2026