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Field-induced Spin Splitting And Anomalous Photoluminescence Circular Polarization In Ch3nh3pbi3 Films At High Magnetic Field

Title: Field-induced Spin Splitting And Anomalous Photoluminescence Circular Polarization In Ch3nh3pbi3 Films At High Magnetic Field.
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Name(s): Zhang, Chuang, author
Sun, Dali, author
Yu, Zhi-Gang, author
Sheng, Chuan-Xiang, author
McGill, Stephen, author
Semenov, Dmitry, author
Vardeny, Zeev Valy, author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-04-16
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The organic-inorganic hybrid perovskites show excellent optical and electrical properties for photovoltaic and a myriad of other optoelectronics applications. Using high-field magneto-optical measurements up to 17.5 T at cryogenic temperatures, we have studied the spin-dependent optical transitions in the prototype CH3NH3PbI3, which are manifested in the field-induced circularly polarized photoluminescence emission. The energy splitting between left and right circularly polarized emission bands is measured to be similar to 1.5 meV at 17.5 T, from which we obtained an exciton effective g factor of similar to 1.32. Also from the photoluminescence diamagnetic shift we estimate the exciton binding energy to be similar to 17 meV at low temperature. Surprisingly, the corresponding field-induced circular polarization is "anomalous" in that the photoluminescence emission of the higher split energy band is stronger than that of the lower split band. This "reversed" intensity ratio originates from the combination of long electron spin relaxation time and hole negative g factor in CH3NH3PbI3, which are in agreement with a model based on the k.p effective-mass approximation.
Identifier: FSU_libsubv1_wos_000430055800003 (IID), 10.1103/PhysRevB.97.134412 (DOI)
Keywords: halide perovskites, quantum dots, solar-cells, inorganic perovskites, effective masses, exciton binding-energy, fine-structure, methylammonium, negatively charged excitons, rashba
Publication Note: The publisher’s version of record is available at https://doi.org/10.1103/PhysRevB.97.134412
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000430055800003
Owner Institution: FSU
Is Part Of: Physical Review B.
2469-9950
Issue: iss. 13, vol. 97

Choose the citation style.
Zhang, C., Sun, D., Yu, Z. -G., Sheng, C. -X., McGill, S., Semenov, D., & Vardeny, Z. V. (2018). Field-induced Spin Splitting And Anomalous Photoluminescence Circular Polarization In Ch3nh3pbi3 Films At High Magnetic Field. Physical Review B. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000430055800003