Ultrafast Carrier Dynamics in Ba_(6)Cr_(2)S_(10)Modified by Toroidal Magnetic Phase Transition  

作　　者：姜丽桐 姜聪颖 田义超 赵惠 张俊 田珍耘 付少华 梁二军 望贤成 靳常青 赵继民 Litong Jiang;CYJiang;YCTian;HZhao;JZhang;ZYTian;SHFu;EJLiang;XCWang;Changqing Jin;Jimin Zhao(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Strong-Field and Ultrafast Photonics Lab,Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China;School of Physics&Laboratory of Zhongyuan Light,Zhengzhou University,Zhengzhou 450052,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Strong-Field and Ultrafast Photonics Lab,Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China [4]School of Physics&Laboratory of Zhongyuan Light,Zhengzhou University,Zhengzhou 450052,China [5]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics Letters》2024年第4期164-172,共9页中国物理快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2021YFA1400201 and 2017YFA0303600);the CAS Project for Young Scientists in Basic Research(Grant No.YSBR-059);the Beijing Natural Science Foundation(Grant No.4191003);the Strategic Priority Research Program of CAS(Grant No.XDB30000000);the CAS Interdisciplinary Innovation Team。

摘　　要：Ba_(6)Cr_(2)S_(10)is a recently discovered magnetic material,in which the spins are aligned ferromagnetically in the ab-plane and anti-parallelly in a paired form along the c-axis.It is characterized as a quasi-one dimensional(1D)dimerized structure with a ferrotoroidic order,forming the simplest candidate toroidal magnetic(TM)order and exhibiting an anti-ferromagnetic-like transition at around 10 K.Time-resolved ultrafast dynamics investigation of the novel A-Cr-S(A:metal elements)family of quantum materials has rarely been reported.Here,we investigate the time-resolved pump-probe ultrafast dynamics of a Ba6Cr2S10 single crystal.A prominent change in the photo-excited carrier dynamics is observed at T_(c)=10 K,corresponding to the reported TM-paramagnetic phase transition.A potential unknown magnetic transition is also found at T^(*)=29 K.Our results provide new evidence for the TM magnetic transition in Ba_(6)Cr_(2)S_(10),and shed light on phase transitions in TM quantum materials.

关 键 词：FERROMAGNETIC MAGNETIC TRANSITION 

分 类 号：O469[理学—凝聚态物理]