Charge-gap formation upon the Verwey transition in Fe3O4

被引：172

作者：

Park, SK ^{[1
]}

Ishikawa, T ^{[1
]}

Tokura, Y ^{[1
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.58.3717

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The temperature-dependent electronic structure has been investigated for a single crystal of magnetite (Fe3O4) by measurements of the optical-conductivity spectrum. Upon the charge-ordering (Verwey) transition (T-V = 121 K), a clear opening of the optical gap (0.14 eV) is observed. Above T-V, the optical conductivity spectra shows notable spectral weight transfer in the Fe 3d intersite transition region (0-2 eV), while preserving the pseudogap or polaronic feature, indicating highly diffuse charge dynamics.

引用

页码：3717 / 3720

页数：4

共 22 条

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