Angle-resolved photoemission study of Fe3O4(001) films across Verwey transition

被引：17
|
作者：
Ran, Fan-Yong [1 ]
Tsunemaru, Yasushi [1 ]
Hasegawa, Takahide [1 ]
Takeichi, Yasuo [1 ]
Harasawa, Ayumi [1 ]
Yaji, Koichiro [1 ]
Kim, Sunghun [1 ]
Kakizaki, Akito [1 ]
机构：
[1] Univ Tokyo, Inst Solid State Phys, Synchrotron Radiat Lab, Kashiwa, Chiba 2778581, Japan
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2012年 / 45卷 / 27期
关键词：
TEMPERATURE PHASE; MAGNETITE; SPECTROSCOPY; GROWTH; GAP;
D O I：
10.1088/0022-3727/45/27/275002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The valence band structure of well-ordered Fe3O4(001) films was investigated in situ by angle-resolved photoemission spectroscopy (ARPES) at room temperature (RT) and 90 K. A band gap of about 70 meV below the Fermi level (E-F) can be observed at 90 K, suggesting a 'metal-insulator' transition. With temperature reduced from RT to 90 K, O 2p-derived features shown in ARPES spectra change substantially. Meanwhile, the feature near EF of the Fe3O4(001) film at 90K becomes about 0.1 eV deeper than that at RT. The results are compared with recent theoretical studies.
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页数：5
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