Ultrafast dynamics of optically excited charge carriers in the room-temperature antiferromagnetic semiconductor α-MnTe

被引：1

作者：

Zhu, Changqing ^{[1
]}

Pilch, Patrick ^{[1
]}

Reinold, Anneke ^{[1
]}

Kudlacik, Dennis ^{[1
]}

Springholz, Gunther ^{[2
]}

Bonanni, Alberta ^{[2
]}

Assmann, Marc ^{[1
]}

Cinchetti, Mirko ^{[1
]}

Wang, Zhe ^{[1
]}

机构：

[1] TU Dortmund Univ, Dept Phys, D-44227 Dortmund, Germany

[2] Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, A-4040 Linz, Austria

来源：

PHYSICAL REVIEW MATERIALS | 2023年 / 7卷 / 05期

基金：

欧洲研究理事会;

关键词：

NEUTRON-DIFFRACTION; DEPENDENCE; ABSORPTION; MANGANESE;

D O I：

10.1103/PhysRevMaterials.7.054601

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on time-resolved optical and terahertz ultrafast spectroscopy of charge-carrier dynamics in the room-temperature antiferromagnetic semiconductor alpha-MnTe. By optically pumping the system with 1.55 eV photons at room temperature, we excite charge carriers in the conduction band through the indirect band gap and investigate the dynamical response of the nonequilibrium states using optical as well as terahertz transmission probes. Three relaxation processes are revealed by their characteristic relaxation times of the order of 1, 10, and 100 ps, whose exact values are a function of the pump fluence. For high pump fluences a nonlinear dependence on the pump fluence is observed both in the optical and terahertz probes.

引用

页数：6

共 27 条

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