High-temperature concomitant metal-insulator and spin-reorientation transitions in a compressed nodal-line ferrimagnet Mn3Si2Te6
- Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of); University of Illinois Chicago
- Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of); Institute for Basic Science (IBS) (Korea, Republic of)
- Seoul National Univ. (Korea, Republic of)
- Univ. of Illinois, Chicago, IL (United States)
- Institute for Basic Science (IBS) (Korea, Republic of)
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) (China)
- Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)
- Pohang Accelerator Lab. (PAL) (Korea, Republic of); Rutgers Univ., New Brunswick, NJ (United States)
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 Tc 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.
- Research Organization:
- Univ. of Illinois, Chicago, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- NA0003975; FG02-07ER46382; SC0020340; AC02-06CH11357
- OSTI ID:
- 2350653
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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