English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Spin-orbit-controlled metal–insulator transition in Sr2IrO4

Zwartsenberg, B., Day, R. P., Razzoli, E., Michiardi, M., Xu, N., Shi, M., et al. (2020). Spin-orbit-controlled metal–insulator transition in Sr2IrO4. Nature Physics, 16, 290-294. doi:10.1038/s41567-019-0750-y.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-9840-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-4EED-9
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Zwartsenberg, B.1, Author
Day, R. P.1, Author
Razzoli, E.1, Author
Michiardi, M.2, Author              
Xu, N.1, Author
Shi, M.1, Author
Denlinger, J.D.1, Author
Cao, G.1, Author
Calder, S.1, Author
Ueda, K.1, Author
Bertinshaw, J.1, Author
Takagi, H.1, Author
Kim, B. J.1, Author
Elfimov, I. S.1, Author
Damascelli, A.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

Content

show
hide
Free keywords: Bandwidth, Calculations, Carrier concentration, Electronic structure, Filling, Ground state, Insulation, Iridium compounds, Photoelectron spectroscopy, Strontium compounds, Angle resolved photoemission spectroscopy, Critical value, Electron interaction, Filling effects, Insulating phase, Insulating state, Orbit coupling, Tight-binding calculations, Metal insulator transition
 Abstract: In the context of correlated insulators, where electron–electron interactions (U) drive the localization of charge carriers, the metal–insulator transition is described as either bandwidth- or filling-controlled1. Motivated by the challenge of the insulating phase in Sr2IrO4, a new class of correlated insulators has been proposed, in which spin–orbit coupling (SOC) is believed to renormalize the bandwidth of the half-filled jeff = 1/2 doublet, allowing a modest U to induce a charge-localized phase2,3. Although this framework has been tacitly assumed, a thorough characterization of the ground state has been elusive4,5. Furthermore, direct evidence for the role of SOC in stabilizing the insulating state has not been established, because previous attempts at revealing the role of SOC6,7 have been hindered by concurrently occurring changes to the filling8–10. We overcome this challenge by employing multiple substituents that introduce well-defined changes to the signatures of SOC and carrier concentration in the electronic structure, as well as a new methodology that allows us to monitor SOC directly. Specifically, we study Sr2Ir1−xTxO4 (T = Ru, Rh) by angle-resolved photoemission spectroscopy, combined with ab initio and supercell tight-binding calculations. This allows us to distinguish relativistic and filling effects, thereby establishing conclusively the central role of SOC in stabilizing the insulating state of Sr2IrO4. Most importantly, we estimate the critical value for SOC in this system to be λc = 0.42 ± 0.01 eV, and provide the first demonstration of a spin–orbit-controlled metal–insulator transition. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.

Details

show
hide
Language(s): eng - English
 Dates: 2020-01-272020-01-27
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1038/s41567-019-0750-y
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Nature Physics
  Other : Nat. Phys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London : Nature Pub. Group
Pages: - Volume / Issue: 16 Sequence Number: - Start / End Page: 290 - 294 Identifier: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850