Photovoltage from ferroelectric domain walls in BiFeO3

被引：9

作者：

Korbel, Sabine ^{[1
,2
]}

Sanvito, Stefano ^{[1
,2
]}

机构：

[1] Trinity Coll Dublin, Sch Phys, AMBER, Dublin 2, Ireland

[2] Trinity Coll Dublin, CRANN Inst, Dublin 2, Ireland

来源：

PHYSICAL REVIEW B | 2020年 / 102卷 / 08期

基金：

欧盟地平线“2020”; 爱尔兰科学基金会;

关键词：

CRYSTAL; TEMPERATURE; EXCITONS; OXIDE;

D O I：

10.1103/PhysRevB.102.081304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the component of the photovoltage in bismuth ferrite that is generated by ferroelectric domain walls, using first-principles methods, in order to compare its magnitude to the experimentally measured photovoltage. We find that excitons at the ferroelectric domain walls form an electric dipole layer resulting in a domain-wall driven photovoltage. This is of the same order of magnitude as the experimentally measured one, but only if the carrier lifetimes and diffusion lengths are larger than previously assumed.

引用

页数：7

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