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Title: Optical absorption and disorder in delafossites

Here, we present compelling experimental results of the optical characteristics of transparent oxide CuGaO 2 and related CuGa 1-xFe xO 2 (with 0.00 ≤ x ≤ 0.05) alloys, whereby the forbidden electronic transitions for CuGaO 2 become permissible in the presence of B-site (Ga sites) alloying with Fe. Our computational structural results imply a correlation between the global strain on the system and a decreased optical absorption edge. However, herein, we show that the relatively ordered CuGa 1-xFe xO 2 (for 0.00 ≤ x ≤ 0.04) structures exhibit much weaker vis-absorption compared to the relatively disordered CuGa 0.95Fe 0.05O 2.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1]
  1. West Virginia Univ., Morgantown, WV (United States)
  2. The National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
Publication Date:
Report Number(s):
UNIV-PUB-393
Journal ID: ISSN 0003-6951; TRN: US1800828
Grant/Contract Number:
HEPC.dsr.12.29; FE0004000
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 1; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1415466
Alternate Identifier(s):
OSTI ID: 1368416