1. High-temperature concomitant metal-insulator and spin-reorientation transitions in a compressed nodal-line ferrimagnet Mn3Si2Te6
- Author
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Resta A. Susilo, Chang Il Kwon, Yoonhan Lee, Nilesh P. Salke, Chandan De, Junho Seo, Beomtak Kang, Russell J. Hemley, Philip Dalladay-Simpson, Zifan Wang, Duck Young Kim, Kyoo Kim, Sang-Wook Cheong, Han Woong Yeom, Kee Hoon Kim, and Jun Sung Kim
- Subjects
Science - Abstract
Abstract Symmetry-protected band degeneracy, coupled with a magnetic order, is the key to realizing novel magnetoelectric phenomena in topological magnets. While the spin-polarized nodal states have been identified to introduce extremely-sensitive electronic responses to the magnetic states, their possible role in determining magnetic ground states has remained elusive. Here, taking external pressure as a control knob, we show that a metal-insulator transition, a spin-reorientation transition, and a structural modification occur concomitantly when the nodal-line state crosses the Fermi level in a ferrimagnetic semiconductor Mn3Si2Te6. These unique pressure-driven magnetic and electronic transitions, associated with the dome-shaped T c variation up to nearly room temperature, originate from the interplay between the spin-orbit coupling of the nodal-line state and magnetic frustration of localized spins. Our findings highlight that the nodal-line states, isolated from other trivial states, can facilitate strongly tunable magnetic properties in topological magnets.
- Published
- 2024
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