Magnetic versus nonmagnetic polymorphs of RuBr$_3$ under pressure
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866910473104916480 |
|---|---|
| author | Shen, Bin Ginga, Victoria A. Arévalo-López, Angel M. Garbarino, Gaston Uykur, Ece Goncalves-Faria, Marcos Mukharjee, Prashanta K. Gegenwart, Philipp Tsirlin, Alexander A. |
| author_facet | Shen, Bin Ginga, Victoria A. Arévalo-López, Angel M. Garbarino, Gaston Uykur, Ece Goncalves-Faria, Marcos Mukharjee, Prashanta K. Gegenwart, Philipp Tsirlin, Alexander A. |
| contents | Pressure evolution of the crystal structure and magnetism of the honeycomb $α$-RuBr$_3$ is studied using high-pressure x-ray diffraction, magnetometry, and density-functional band-structure calculations. Hydrostatic compression transforms antiferromagnetic $α$-RuBr$_3$ ($R\bar 3$) into paramagnetic $α'$-RuBr$_3$ ($P\bar 1$) where short Ru-Ru bonds cause magnetism collapse above 1.3 GPa at 0 K and 2.5 GPa at 295 K. Below this critical pressure, the Néel temperature of $α$-RuBr$_3$ increases with the slope of 1.8 K/GPa. Pressure tunes $α$-RuBr$_3$ away from the Kitaev limit, whereas increased third-neighbor in-plane coupling and interlayer coupling lead to a further stabilization of the collinear zigzag state. Both $α$- and $α'$-RuBr$_3$ are metastable at ambient pressure, but their transformation into the thermodynamically stable $β$-polymorph is kinetically hindered at room temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_17085 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Magnetic versus nonmagnetic polymorphs of RuBr$_3$ under pressure Shen, Bin Ginga, Victoria A. Arévalo-López, Angel M. Garbarino, Gaston Uykur, Ece Goncalves-Faria, Marcos Mukharjee, Prashanta K. Gegenwart, Philipp Tsirlin, Alexander A. Strongly Correlated Electrons Materials Science Pressure evolution of the crystal structure and magnetism of the honeycomb $α$-RuBr$_3$ is studied using high-pressure x-ray diffraction, magnetometry, and density-functional band-structure calculations. Hydrostatic compression transforms antiferromagnetic $α$-RuBr$_3$ ($R\bar 3$) into paramagnetic $α'$-RuBr$_3$ ($P\bar 1$) where short Ru-Ru bonds cause magnetism collapse above 1.3 GPa at 0 K and 2.5 GPa at 295 K. Below this critical pressure, the Néel temperature of $α$-RuBr$_3$ increases with the slope of 1.8 K/GPa. Pressure tunes $α$-RuBr$_3$ away from the Kitaev limit, whereas increased third-neighbor in-plane coupling and interlayer coupling lead to a further stabilization of the collinear zigzag state. Both $α$- and $α'$-RuBr$_3$ are metastable at ambient pressure, but their transformation into the thermodynamically stable $β$-polymorph is kinetically hindered at room temperature. |
| title | Magnetic versus nonmagnetic polymorphs of RuBr$_3$ under pressure |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2403.17085 |