Issue |
EPL
Volume 106, Number 6, June 2014
|
|
---|---|---|
Article Number | 67005 | |
Number of page(s) | 5 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/106/67005 | |
Published online | 19 June 2014 |
Observation of diamagnetic effect in BaSnO3 via low-temperature magneto-photoluminescence spectroscopy
1 Department 1Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences Hefei 230031, Anhui, PRC
2 Department of Materials Science and Engineering, University of Science and Technology of China Hefei 230026, Anhui, PRC
3 High Magnetic Field Laboratory, Chinese Academy of Sciences - Hefei 230031, Anhui, PRC
(a) fhsu@issp.ac.cn
(b) jmdai@issp.ac.cn
Received: 17 January 2014
Accepted: 28 May 2014
Photoluminescence measurements for pure BaSnO3 are carried out at low temperatures and high magnetic fields, down to 4 K and up to 8 T, respectively. Multiple phonon replicas are observed in the near-infrared region, which allows for a quantitative estimation of the Huang-Rhys factor, . Due to the extremely narrow linewidth, a magnetic-field–induced nonlinear blueshift of the zero phonon line (ZPL) and a small increase of the phonon energy are clearly distinguishable. The magnetic-field dependence of the ZPL energies can be interpreted in terms of diamagnetic effects of the s-like local electronic state. The electron effective mass value of 0.14m0 is extracted from the best fitting.
PACS: 75.20.-g – Diamagnetism, paramagnetism, and superparamagnetism / 71.20.Dg – Alkali and alkaline earth metals / 78.55.-m – Photoluminescence, properties and materials
© EPLA, 2014
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