Magnetization-driven Lifshitz transition and charge-spin coupling in the kagome metal YMn6Sn6

Journal Article · 15 March 2022 · Communications Physics

DOI: https://doi.org/10.1038/s42005-022-00833-2 · OSTI ID:1854969

Siegfried, Peter E. ; Bhandari, Hari; Jones, David C.; Ghimire, Madhav P.; Dally, Rebecca L. ; Poudel, Lekh ; Bleuel, Markus; Lynn, Jeffrey W. ; Mazin, Igor I. ; Ghimire, Nirmal J.

Abstract The Fermi surface (FS) is essential for understanding the properties of metals. It can change under both conventional symmetry-breaking phase transitions and Lifshitz transitions (LTs), where the FS, but not the crystal symmetry, changes abruptly. Magnetic phase transitions involving uniformly rotating spin textures are conventional in nature, requiring strong spin-orbit coupling (SOC) to influence the FS topology and generate measurable properties. LTs driven by a continuously varying magnetization are rarely discussed. Here we present two such manifestations in the magnetotransport of the kagome magnet YMn ₆ Sn ₆ : one caused by changes in the magnetic structure and another by a magnetization-driven LT. The former yields a 10% magnetoresistance enhancement without a strong SOC, while the latter a 45% reduction in the resistivity. These phenomena offer a unique view into the interplay of magnetism and electronic topology, and for understanding the rare-earth counterparts, such as TbMn ₆ Sn ₆ , recently shown to harbor correlated topological physics.

• Research Organization: George Mason Univ., Fairfax, VA (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
• Grant/Contract Number: SC0021089
• OSTI ID: 1854969
• Journal Information: Communications Physics, Journal Name: Communications Physics Journal Issue: 1 Vol. 5; ISSN 2399-3650
• Publisher: Nature Publishing GroupCopyright Statement
• Country of Publication: United Kingdom
• Language: English