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Spin texture induced by non-magnetic doping and spin dynamics in 2D triangular lattice antiferromagnet h-Y(Mn,Al)O3

Journal Article · · Nature Communications
 [1];  [2];  [2];  [3];  [4];  [2];  [2];  [2];  [5];  [6];  [6];  [7];  [8];  [9];  [10];  [11];  [2]
  1. Seoul National Univ. (Korea); University of California, Irvine
  2. Seoul National Univ. (Korea)
  3. Seoul National Univ. (Korea); Inst. for Basic Science, Daejeon (Korea); Incheon National Univ. (Korea)
  4. Seoul National Univ. (Korea); Technische Univ. München, Garching (Germany)
  5. Australian Nuclear Science and Technology Organisation, Lucas Heights (Australia)
  6. Comprehensive Research Organization for Science and Society (CROSS), Ibaraki (Japan)
  7. STFC Rutherford Appleton Lab., Oxfordshire (United Kingdom)
  8. STFC Rutherford Appleton Lab., Oxfordshire (United Kingdom); Brookhaven National Lab. (BNL), Upton, NY (United States)
  9. Rutgers Univ., Piscataway, NJ (United States)
  10. Univ. Grenoble Alpes (France)
  11. Univ. of California, Irvine, CA (United States)
+ Show Author Affiliations

Novel effects induced by nonmagnetic impurities in frustrated magnets and quantum spin liquid represent a highly nontrivial and interesting problem. A theoretical proposal of extended modulated spin structures induced by doping of such magnets, distinct from the well-known skyrmions has attracted significant interest. Here, we demonstrate that nonmagnetic impurities can produce such extended spin structures in h-YMnO3, a triangular antiferromagnet with noncollinear magnetic order. Using inelastic neutron scattering (INS), we measured the full dynamical structure factor in Al-doped h-YMnO3 and confirmed the presence of magnon damping with a clear momentum dependence. Our theoretical calculations can reproduce the key features of the INS data, supporting the formation of the proposed spin textures. As such, our study provides the first experimental confirmation of the impurity-induced spin textures. It offers new insights and understanding of the impurity effects in a broad class of noncollinear magnetic systems.

Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Research Foundation of Korea; ANR, France
Grant/Contract Number:
SC0021221; FG02-04ER46174
OSTI ID:
1783727
Alternate ID(s):
OSTI ID: 1783730
OSTI ID: 1784329
OSTI ID: 1784331
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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