Spin-dependent optical transitions in yttrium iron garnet

Jiunn Chen*, Hua Shu Hsu, Fang Yuh Lo

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

This study reviewed the electronic structure using density functional theory (DFT) and demostrated the transmission of optical magnetic circular spectrum in probing spin-dependent optical transitions in yttrium iron garnet (YIG). DFT+Uresults suggested that the t2 orbital of tetrahedral irons are polarized by exchange-splittingO(2p) bands. Such polarization was found to be essential for the kinetic exchange and magnetism in YIG. DFT+Uresults also identified the spin-polarized energy gaps in YIG. On the basis of the distinctions of Fe3O4 [J. Chen et al, Phys. Rev. B, 98, 085 141 (2018)] and YIG in electronic band features along with their manifestations in an optical magnetic circular diachroism (OMCD) spectrum, a map of spin-dependent optical transitions in YIG is presented. Based on the analysis ofOMCDspectra at room temperature, the majority-spin and minority-spin gap in YIG are determined to be 2.45 and 2.25 eV, respectively.

原文英語
文章編號abe013
期刊Materials Research Express
8
發行號2
DOIs
出版狀態已發佈 - 2021 二月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 生物材料
  • 表面、塗料和薄膜
  • 聚合物和塑料
  • 金屬和合金

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