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PreprintarXiv licencearXiv

Tuning J1-J2 in Quasi-2D Triangular Lattice Antiferromagnet α-SrCr2O4 via Uniaxial Pressure

  • Jazzmin Victorin
  • Shreenanda Ghosh
  • Seyed Koohpayeh
  • Chris Lygouras
  • Natalia Drichko
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Abstract

Triangular lattice antiferromagnets first attracted attention as a frustrated magnetic lattice which can serve as a platform to realize the resonating valence bond state. While the triangular lattice itself was shown to support classical 120 degree order, many theoretical phase diagrams suggest a quantum spin liquid state within a small range of parameters. One possible avenue to achieve such a state is to tune the anisotropy of the triangular lattice antiferromagnet by applying uniaxial pressure. This motivated our Raman scattering study of quasi-two-dimensional antiferromagnet α-SrCr2O4 under applied uniaxial pressure. Under ambient conditions, α-SrCr2O4 develops long-range helical magnetic order below TN = 43 K. We identify two-magnon excitations associated with this long-range antiferromagnetic order below TN at 15.5 meV and 40 meV by comparison with spin wave calculations. We observe the two features from the two-magnon excitation shift away from (towards) each other under applied tensile (compressive) pressure, indicating a decrease (increase) in anisotropy. Raman active phonons show a shift to higher (lower) frequencies under applied compressive (tensile) pressure, indicating efficient transmission of pressure and tuning of the lattice. We show spin wave and two-magnon density of states calculations under uniaxial pressure are consistent with our experimental results.

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Cite

BibTeXRIS
BibTeX
@misc{victorin2026tuning,
  title = {{Tuning J$_1$-J$_2$ in Quasi-2D Triangular Lattice Antiferromagnet $α$-SrCr$_2$O$_4$ via Uniaxial Pressure}},
  author = {Jazzmin Victorin and Shreenanda Ghosh and Seyed Koohpayeh and Chris Lygouras and Natalia Drichko},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2605.23133},
  eprint = {2605.23133},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.23133},
}
RIS
TY  - UNPB
TI  - Tuning J_1-J_2 in Quasi-2D Triangular Lattice Antiferromagnet α-SrCr_2O_4 via Uniaxial Pressure
AU  - Jazzmin Victorin
AU  - Shreenanda Ghosh
AU  - Seyed Koohpayeh
AU  - Chris Lygouras
AU  - Natalia Drichko
PY  - 2026
DA  - 2026/09/10
PB  - arXiv
DO  - 10.48550/arxiv.2605.23133
UR  - https://arxiv.org/abs/2605.23133
AB  - Triangular lattice antiferromagnets first attracted attention as a frustrated magnetic lattice which can serve as a platform to realize the resonating valence bond state. While the triangular lattice itself was shown to support classical 120 degree order, many theoretical phase diagrams suggest a quantum spin liquid state within a small range of parameters. One possible avenue to achieve such a state is to tune the anisotropy of the triangular lattice antiferromagnet by applying uniaxial pressure. This motivated our Raman scattering study of quasi-two-dimensional antiferromagnet α-SrCr_2O_4 under applied uniaxial pressure. Under ambient conditions, α-SrCr_2O_4 develops long-range helical magnetic order below T_N = 43 K. We identify two-magnon excitations associated with this long-range antiferromagnetic order below T_N at 15.5 meV and 40 meV by comparison with spin wave calculations. We observe the two features from the two-magnon excitation shift away from (towards) each other under applied tensile (compressive) pressure, indicating a decrease (increase) in anisotropy. Raman active phonons show a shift to higher (lower) frequencies under applied compressive (tensile) pressure, indicating efficient transmission of pressure and tuning of the lattice. We show spin wave and two-magnon density of states calculations under uniaxial pressure are consistent with our experimental results.
ER  -