Quantum Oscillations in Noncentrosymmetric Weyl Semimetal SmAlSi

曹渭征; 苏云龙; 王琦; 裴翠颖; 高玲玲; 赵毅; 李昌华; 余娜; 王靖珲; 柳仲楷; 陈宇林; 李刚; 李军; 齐彦鹏

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Quantum Oscillations in Noncentrosymmetric Weyl Semimetal SmAlSi

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As a new type of quantum state of matter hosting low energy relativistic quasiparticles,Weyl semimetals(WSMs)have attracted significant attention for scientific community and potential quantum device applications.In this study,we present a comprehensive investigation of the structural,magnetic,and transport properties of noncentrosymmetric RAl Si(R=Sm,Ce),which have been predicted to be new magnetic WSM candidates.Both samples exhibit nonsaturated magnetoresistance,with about 900%and 80%for Sm Al Si and Ce Al Si,respectively,at temperature of 1.8 K and magnetic field of 9 T.The carrier densities of Sm Al Si and Ce Al Si exhibit remarkable change around magnetic transition temperatures,signifying that the electronic states are sensitive to the magnetic ordering of rare-earth elements.At low temperatures,Sm Al Si reveals prominent Shubnikov–de Haas oscillations associated with the nontrivial Berry phase.High-pressure experiments demonstrate that the magnetic order is robust and survival under high pressure.Our results would yield valuable insights into WSM physics and potentials in applications to next-generation spintronic devices in the RAl Si(R=Sm,Ce)family.

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来源
《中国物理快报：英文版》 |2022年第4期|67-73|共7页
作者
曹渭征; 苏云龙; 王琦; 裴翠颖; 高玲玲; 赵毅; 李昌华; 余娜; 王靖珲; 柳仲楷; 陈宇林; 李刚; 李军; 齐彦鹏;
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作者单位

School of Physical Science and Technology;

ShanghaiTech University;

Shanghai 201210;

China;

ShanghaiTech Laboratory for Topological Physics;

ShanghaiTech University;

Shanghai 201210;

China;

Department of Physics;

Clarendon Laboratory;

University of Oxford;

Parks Road;

Oxford OX13PU;

UK;

Shanghai Key Laboratory of High-resolution Electron Microscopy;

ShanghaiTech University;

Shanghai 201210;

China;

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原文格式 PDF
正文语种 chi
中图分类凝聚态物理学;
关键词
symmetric; quantum; nontrivial;

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Quantum Oscillations in Noncentrosymmetric Weyl Semimetal SmAlSi

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