Spin-split conduction band in EuB6 and tuning of half-metallicity with external stimuli
學年 101
學期 2
出版（發表）日期 2013-04-02
作品名稱 Spin-split conduction band in EuB6 and tuning of half-metallicity with external stimuli
作品名稱（其他語言）
著者 Jungho Kim; Wei Ku; Chi-Cheng Lee; D. S. Ellis; B. K. Cho; A. H. Said; Y. Shvyd’ko; Young-June Kim
單位
出版者
著錄名稱、卷期、頁數 Phys. Rev. B 87, 155104
摘要 We report an Eu L3-edge resonant inelastic x-ray scattering (RIXS) investigation of the electronic structure of EuB6. We observe that the RIXS spectral weight around 1.1 eV increases dramatically when the system is cooled below the ferromagnetic ordering temperature and follows the magnetic order parameter. This spectral feature is attributed to the intersite excitation from the local 4f orbital to the spin-split 5d orbital on the neighboring site, illustrating the essential role of exchange splitting of the conducting electrons. Based on our density functional theory calculations and the RIXS data, EuB6 at low temperature can be consistently described with a semimetallic electronic structure with incomplete spin polarization. We propose that half-metallicity in EuB 6 can be achieved utilizing the strong tunability of the electronic structure against gate voltage, strain, and magnetic field.
關鍵字
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117349 )