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Title: High-temperature concomitant metal-insulator and spin-reorientation transitions in a compressed nodal-line ferrimagnet Mn3Si2Te6

Journal Article · · Nature Communications
 [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [2];  [2]; ORCiD logo [4]; ORCiD logo [6];  [6]; ORCiD logo [6];  [7]; ORCiD logo [8]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]
  1. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of); University of Illinois Chicago
  2. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of); Institute for Basic Science (IBS) (Korea, Republic of)
  3. Seoul National Univ. (Korea, Republic of)
  4. Univ. of Illinois, Chicago, IL (United States)
  5. Institute for Basic Science (IBS) (Korea, Republic of)
  6. Center for High Pressure Science and Technology Advanced Research (HPSTAR) (China)
  7. Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)
  8. 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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