Work

Origin of the superior conductivity of perovskite Ba(Sr)SnO3

Year: 2013

Type: article

Abstract: ASnO3 (A = Ba, Sr) are unique perovskite oxides in that they have superior electron conductivity despite their wide optical band gaps. Using first-principles band structure calculations, we show that the small electron effective masses, thus, good electron conductivity of ASnO3 can be attributed to the large size of Sn in this system that gives the conduction band edge with antibonding Sn and Os characters. Moreover, we show that ASnO3 can be easily doped by La with shallow LaA(+/0) donor level. Our results, therefore, explain why the perovskite BaSnO3, SrSnO3, and their alloys are promising candidates for transparent conducting oxides.

Source: Applied Physics Letters

DOI: 10.1063/1.4798325

Authors: Heng-Rui Liu, Ji-Hui Yang, H. J. Xiang, X. G. Gong, Su-Huai Wei

Institutions: Fudan University, State Key Laboratory of Surface Physics, National Laboratory of the Rockies

Language: English

Topic: Electronic and Structural Properties of Oxides

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: U.S. Department of Energy

Award: G14908310