English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Low-energy description of the metal-insulator transition in the rare-earth nickelates

Subedi, A., Peil, O. E., & Georges, A. (2015). Low-energy description of the metal-insulator transition in the rare-earth nickelates. Physical Review B, 91(7): 075128. doi:10.1103/PhysRevB.91.075128.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-0275-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-2CED-D
Genre: Journal Article

Files

show Files
hide Files
:
PhysRevB.91.075128.pdf (Publisher version), 2MB
Name:
PhysRevB.91.075128.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2015
Copyright Info:
© American Physical Society
License:
-

Locators

show
hide
Locator:
https://dx.doi.org/10.1103/PhysRevB.91.075128 (Publisher version)
Description:
-
Locator:
http://arxiv.org/abs/1410.2830 (Preprint)
Description:
-

Creators

show
hide
 Creators:
Subedi, A.1, 2, Author              
Peil, Oleg E. 2, Author
Georges, Antoine2, Author
Affiliations:
1Theory of Complex Materials, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074318              
2Centre de Physique Théorique, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France, ou_persistent22              

Content

show
hide
Free keywords: PACS numbers: 71.30.+h, 71.15.Mb, 71.38.−k
 Abstract: We propose a simple theoretical description of the metal-insulator transition of rare-earth nickelates. The theory involves only two orbitals per nickel site, corresponding to the low-energy antibonding eg states. In the monoclinic insulating state, bond-length disproportionation splits the manifold of eg bands, corresponding to a modulation of the effective on-site energy. We show that, when subject to a local Coulomb repulsion U and Hund's coupling J, the resulting bond-disproportionated state is a paramagnetic insulator for a wide range of interaction parameters. Furthermore, we find that when U−3J is small or negative, a spontaneous instability to bond disproportionation takes place for large enough J. This minimal theory emphasizes that a small or negative charge-transfer energy, a large Hund's coupling, and a strong coupling to bond disproportionation are the key factors underlying the transition. Experimental consequences of this theoretical picture are discussed.

Details

show
hide
Language(s): eng - English
 Dates: 2015-01-272014-10-102015-02-252015-02-15
 Publication Status: Published in print
 Pages: 16
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.91.075128
arXiv: 1410.2830
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 91 (7) Sequence Number: 075128 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008