Magneto-optic Kerr Effect Measurement of TbMn6Sn6 at mK Temperature

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外文摘要：Novel electron states stabilized by Coulomb interactions attract tremendous interests in condensed matter physics.These states are studied by corresponding phase transitions occurring at extreme conditions such as mK temperatures and high magnetic field.In this work,we introduce a magneto-optical Kerr effect measurement system to comprehensively explore these phases in addition to conventional transport measurement.This system,composed of an all-fiber zero-loop Sagnac interferometer and in situ piezo-scanner inside a dilution refrigerator,operates below 100 mK,with a maximum field of 12 Tesla and has a resolution as small as 0.2µrad.As a demonstration,we investigate TbMn6Sn6,where the manganese atoms form Kagome lattice that hosts topological non-trivial Dirac cones.We observed two types of Kerr signals,stemming from its fully polarized ferromagnetic ground state and positive charged carriers within the Dirac-like dispersion.

作者：

黄代强、汪洋、王贺、王健、刘阳

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作者单位：

International Center for Quantum Materials,Peking University,Beijing 100871,China

Department of Physics,Capital Normal University,Beijing 100048,China

Collaborative Innovation Center of Quantum Matter,Beijing 100871,China

Hefei National Laboratory,Hefei 230088,China

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基金：

国家重点研发计划国家重点研发计划国家重点研发计划Innovation Program for Quantum Science and TechnologyInnovation Program for Quantum Science and Technology国家自然科学基金国家自然科学基金国家自然科学基金Capacity Building for Sci-Tech Innovation-Fundamental Scientific Research FundsCapacity Building for Sci-Tech Innovation-Fundamental Scientific Research Funds

项目编号：

2021YFA14019002019YFA03084032018YFA03056042021ZD03026022021ZD030240392065104120740101188810120530290057KM202010028014

出版年：

2024

DOI：

10.1088/0256-307X/41/4/047801

中国物理快报(英文版)

中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI

影响因子：0.515

ISSN：0256-307X

年,卷(期)：2024.41(4)

参考文献量27