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Title: Unusual magnetoresistance in cubic B20 Fe0.85Co0.15Si chiral magnets

The B20 chiral magnets with broken inversion symmetry and C4 rotation symmetry have attracted much attention. The broken inversion symmetry leads to the Dzyaloshinskii–Moriya that gives rise to the helical and Skyrmion states.Wereport the unusual magnetoresistance (MR) of B20 chiral magnet Fe0.85Co0.15Si that directly reveals the broken C4 rotation symmetry and shows the anisotropic scattering by Skyrmions with respect to the current directions. The intimacy between unusual MR and broken symmetry is well confirmed by theoretically studying an effective Hamiltonian with spin–orbit coupling. In conclusion, the unusual MR serves as a transport signature for the Skyrmion phase.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [6]
  1. Johns Hopkins Univ., Baltimore, MD (United States); Univ. of Miami, Coral Gables, FL (United States)
  2. Johns Hopkins Univ., Baltimore, MD (United States); Nanjing Univ., Nanjing (People's Republic of China)
  3. Univ. of Minnesota, Minneapolis, MN (United States)
  4. Johns Hopkins Univ., Baltimore, MD (United States); Univ. of New Hampshire, Durham, NH (United States)
  5. National Taiwan Univ., Taipei (Taiwan)
  6. Johns Hopkins Univ., Baltimore, MD (United States)
Publication Date:
OSTI Identifier:
1312951
Grant/Contract Number:
FG02-08ER46544
Type:
Accepted Manuscript
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 18; Journal Issue: 6; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Research Org:
Johns Hopkins Univ., Baltimore, MD (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE Skyrmion; broken symmetry; magnetoresistance