Spin polarized positron lifetimes in ferromagnetic metals: First-principles study

被引：17

作者：

Lin, Jianbo ^{[1
]}

Yamasaki, Takahiro ^{[2
]}

Saito, Mineo ^{[1
]}

机构：

[1] Kanazawa Univ, Grad Sch Nat Sci & Technol, Div Math & Phys Sci, Kanazawa, Ishikawa 9201192, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2014年 / 53卷 / 05期

基金：

日本学术振兴会;

关键词：

ANNIHILATION RADIATION; SEMICONDUCTORS; NICKEL;

D O I：

10.7567/JJAP.53.053002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We carry out spin-polarized positron lifetime calculations for ferromagnetic metals using the electron-positron density functional theory (DFT). We investigate Fe, Co, and Ni and find that the differences between the positron lifetimes for their minority and majority spins (tau(down arrow) - tau(up arrow)) are 11.85, 3.75, and -4.37 ps, respectively. The negative lifetime difference of Ni is presumed to originate from an unlocalized distribution of minority electrons. (C) 2014 The Japan Society of Applied Physics

引用

页数：4

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