| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magneto-optic Kerr Effect Measurement of TbMn$_{6}$Sn$_{6}$ at mK Temperature |
| Dai-Qiang Huang1†, Yang Wang2†, He Wang2*, Jian Wang1,3,4, and Yang Liu1* |
1International Center for Quantum Materials, Peking University, Beijing 100871, China
2Department of Physics, Capital Normal University, Beijing 100048, China
3Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
4Hefei National Laboratory, Hefei 230088, China
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| Cite this article: |
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Dai-Qiang Huang, Yang Wang, He Wang et al 2024 Chin. Phys. Lett. 41 047801 |
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Abstract 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 0.2 µrad. As a demonstration, we investigate TbMn$_6{\rm Sn}_6$, 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.
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Received: 17 January 2024
Editors' Suggestion
Published: 09 April 2024
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| PACS: |
03.67.Lx
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(Quantum computation architectures and implementations)
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03.67.-a
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(Quantum information)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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03.67.Pp
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(Quantum error correction and other methods for protection against decoherence)
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