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Distinct magneto-Raman signatures of spin-flip phase transitions in CrI3

Journal Article · · Nature Communications
 [1];  [2];  [3];  [4];  [5];  [3];  [3];  [6];  [7];  [8];  [9];  [9];  [8];  [6];  [3];  [3];  [3];  [3];  [10]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Physical Measurement Lab. Nanoscale Device Characterization Division; OSTI
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Physical Measurement Lab. Nanoscale Device Characterization Division; The Ohio State Univ., Columbus, OH (United States). Dept. of Physics
  3. The Ohio State Univ., Columbus, OH (United States). Dept. of Physics
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Physical Measurement Lab. Nanoscale Device Characterization Division; Towson Univ., Towson, MD (United States). Dept. of Physics, Astronomy and Geosciences
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Material Measurement Lab. Materials Measurement Science Division
  6. Pennsylvania State Univ., University Park, PA (United States). Dept. of Physics
  7. Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Physics
  8. The Ohio State Univ., Columbus, OH (United States). Dept. of Chemistry and Biochemistry
  9. National Inst. for Materials Science, Tsukuba, Ibaraki (Japan)
  10. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Physical Measurement Lab. Nanoscale Device Characterization Division
The discovery of 2-dimensional (2D) materials, such as CrI3, that retain magnetic ordering at monolayer thickness has resulted in a surge of both pure and applied research in 2D magnetism. Here, we report a magneto-Raman spectroscopy study on multilayered CrI3, focusing on two additional features in the spectra that appear below the magnetic ordering temperature and were previously assigned to high frequency magnons. Instead, we conclude these modes are actually zone-folded phonons. We observe a striking evolution of the Raman spectra with increasing magnetic field applied perpendicular to the atomic layers in which clear, sudden changes in intensities of the modes are attributed to the interlayer ordering changing from antiferromagnetic to ferromagnetic at a critical magnetic field. Our work highlights the sensitivity of the Raman modes to weak interlayer spin ordering in CrI3.
Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0019068
OSTI ID:
1803544
Alternate ID(s):
OSTI ID: 1868539
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 11; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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