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10.3390/ma18174044
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Article

Dirac Point in the Charge Compensated Single-Crystal Ru3Sn7

by
Xiaoyu Ji
1,2,
Xuebo Zhou
2,
Shilin Zhu
2,
Fengcai Ma
1,*,
Gang Li
2,* and
Wei Wu
2,*
1
Department of Physics, Liaoning University, Shenyang 110036, China
2
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
*
Authors to whom correspondence should be addressed.
Materials 2025, 18(17), 4044; https://doi.org/10.3390/ma18174044
Submission received: 27 June 2025 / Revised: 22 July 2025 / Accepted: 25 August 2025 / Published: 29 August 2025
(This article belongs to the Special Issue Advances in Superconductor Materials: Preparation and Characterization)
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Abstract

Ru3Sn7 crystallizes in the cubic Ir3Ge7-type structure (space group Im3m), a class of intermetallic compounds. Previous studies focused primarily on its crystal structure, band calculations, and basic transport properties. Here, we report a systematic investigation of high-quality single crystals via electrical resistivity, Hall effect, specific heat, and thermal transport measurements. The T3X7 intermetallic family—with its diverse electronic ground states—provides an ideal platform for exploring such topology–property relationships. Ru3Sn7 exhibits metallic behavior, with consistent Hall effect and Seebeck coefficient data indicating a compensated electron-hole two-band system. Temperature-dependent modulation of electronic states near the Fermi surface alters charge carrier transport, which may imply the presence of a Lifshitz transition in Ru3Sn7. More importantly, magnetic quantum oscillations are observed for the first time, confirming the presence of two Dirac points in its band structure.
Keywords: Dirac point; topological material; quantum oscillations Dirac point; topological material; quantum oscillations

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MDPI and ACS Style

Ji, X.; Zhou, X.; Zhu, S.; Ma, F.; Li, G.; Wu, W. Dirac Point in the Charge Compensated Single-Crystal Ru3Sn7. Materials 2025, 18, 4044. https://doi.org/10.3390/ma18174044

AMA Style

Ji X, Zhou X, Zhu S, Ma F, Li G, Wu W. Dirac Point in the Charge Compensated Single-Crystal Ru3Sn7. Materials. 2025; 18(17):4044. https://doi.org/10.3390/ma18174044

Chicago/Turabian Style

Ji, Xiaoyu, Xuebo Zhou, Shilin Zhu, Fengcai Ma, Gang Li, and Wei Wu. 2025. "Dirac Point in the Charge Compensated Single-Crystal Ru3Sn7" Materials 18, no. 17: 4044. https://doi.org/10.3390/ma18174044

APA Style

Ji, X., Zhou, X., Zhu, S., Ma, F., Li, G., & Wu, W. (2025). Dirac Point in the Charge Compensated Single-Crystal Ru3Sn7. Materials, 18(17), 4044. https://doi.org/10.3390/ma18174044

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