English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Spin-state order/disorder and metal-insulator transition in GdBaCo2O5.5 : experimental determination of the underlying electronic structure

Hu, Z., Wu, H., Koethe, T. C., Barilo, S. N., Shiryaev, S. V., Bychkov, G. L., et al. (2012). Spin-state order/disorder and metal-insulator transition in GdBaCo2O5.5: experimental determination of the underlying electronic structure. New Journal of Physics, 14(12), 123025-1-123025-12. doi:10.1088/1367-2630/14/12/123025.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Hu, Z.1, Author           
Wu, H., Author
Koethe, T. C., Author
Barilo, S. N., Author
Shiryaev, S. V., Author
Bychkov, G. L., Author
Schüßler-Langeheine, C., Author
Lorenz, T., Author
Tanaka, A., Author
Hsieh, H. H., Author
Lin, H. J., Author
Chen, C. T., Author
Brookes, N. B., Author
Agrestini, S.2, Author           
Chin, Y.-Y.3, Author           
Rotter, M.4, Author           
Tjeng, L. H.5, Author           
Affiliations:
1Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
2Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              
3Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
4Martin Rotter, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863453              
5Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

Content

show
hide
Free keywords: -
 Abstract: We have investigated the electronic structure of GdBaCo 2 O 5.5 across the metal–insulator transition (MIT) using soft x-ray absorption and photoelectron spectroscopy. For the low-temperature insulating phase, we find that half of the Co 3+ ions at the octahedral sites are in the low spin (LS) and the other half in the high spin (HS) state, while the Co 3+ ions at the pyramidal sites are in the HS configuration. Upon increasing the temperature across the MIT, part of the LS octahedral Co 3+ undergoes a spin-state transition into the HS configuration. We infer that this destroys the spin-state ordering and thus explains the decrease in resistivity. We observed that the band gap is reduced but not closed in the high-temperature phase.

Details

show
hide
Language(s): eng - English
 Dates: 2012-12-12
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: New Journal of Physics
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 14 (12) Sequence Number: - Start / End Page: 123025-1 - 123025-12 Identifier: ISSN: 1367-2630