Quenching of the relaxation pathway in the Weyl semimetal TaAs

Quenching of the relaxation pathway in the Weyl semimetal TaAs

Since tantalum arsenide (TaAs) has been experimentally verified as a Weyl semimetal, intensive research has been devoted to study of the unique properties of the material. Despite this, the ultrafast dynamics of TaAs is still not very well understood. In this work, we study the relaxation dynamics i...

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Bibliographic Details
Main Authors: Liu, Jiayun, Cheng, Liang, Zhao, Daming, Chen, Xiaoxuan, Sun, Handong, Li, Zhilin, Wang, Xinbo, Zhu, Jian-Xin, Chia, Elbert E. M.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2021
Subjects:
Science::Physics
Relaxation Pathway
Weyl Semimetal
Online Access:https://hdl.handle.net/10356/151131
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Institution: Nanyang Technological University
Language: English
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Summary:Since tantalum arsenide (TaAs) has been experimentally verified as a Weyl semimetal, intensive research has been devoted to study of the unique properties of the material. Despite this, the ultrafast dynamics of TaAs is still not very well understood. In this work, we study the relaxation dynamics in TaAs using transient reflection spectroscopy. From the transient reflection measurement, we observe either a single (fast) or a dual (fast and slow) relaxation, depending on the probing wavelength. The additional relaxation channel is attributed to an asymmetric population of photoexcited electrons and holes.

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