| Autor: |
Neal, SN, Kim, HS, Smith, KA, Haglund, AV, Mandrus, DG, Bechtel, HA, Carr, GL, Haule, K, Vanderbilt, D, Musfeldt, JL |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Physical Review B, vol 100, iss 7 |
| Popis: |
We measured the near-field infrared response of MnPS3 in bulk, few-, and single-layer form and compared our findings with traditional far-field vibrational spectroscopies, a symmetry analysis, and first-principles lattice dynamics calculations. Trends in the Bu mode near 450cm-1 are striking, with the disappearance of this structure in the thinnest sheets. Combined with the amplified response of the activated Ag mode and analysis of the Au+Bu features, we find that symmetry is unexpectedly increased in few- and single-sheet MnPS3 due to a restoration of the threefold axes of rotation. Monoclinicity in this system is therefore a consequence of the long-range stacking pattern and temperature rather than local structure. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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