1. Exotic Magnetic and Electronic Properties of Layered CrI3 Single Crystals Under High Pressure
- Author
-
Ghosh, Anirudha, Singh, D., Mu, Qingge, Kvashnin, Y., Haider, G., Jonak, M., Chareev, D., Aramaki, T., Medvedev, S. A., Klingeler, R., Mito, M., Abdul-Hafidh, E. H., Vejpravova, J., Kalbac, M., Ahuja, R., Eriksson, Olle, and Abdel-Hafiez, Mahmoud
- Subjects
Condensed Matter - Strongly Correlated Electrons - Abstract
Through advanced experimental techniques on CrI$_{3}$ single crystals, we derive a previously not discussed pressure-temperature phase diagram. We find that $T_{c}$ increases to $\sim$ 66\,K with pressure up to $\sim$ 3\,GPa followed by a decrease to $\sim$ 10\,K at 21.2\,GPa. The experimental results are reproduced by theoretical calculations based on density functional theory where electron-electron interactions are treated by a static on-site Hubbard U on Cr 3$d$ orbitals. The origin of the pressure induced reduction of the ordering temperature is associated with a decrease of the calculated bond angle, from 95$^{\circ}$ at ambient pressure to $\sim$ 85$^{\circ}$ at 25\,GPa. Above 22\,GPa, the magnetically ordered state is essentially quenched, possibly driving the system to a Kitaev spin-liquid state at low temperature, thereby opening up the possibility of further exploration of long-range quantum entanglement between spins. The pressure-induced semiconductor-to-metal phase transition was revealed by high-pressure resistivity that is accompanied by a transition from a robust ferromagnetic state to gradually more dominating anti-ferromagnetic interactions and was consistent with theoretical modeling.
- Published
- 2021
- Full Text
- View/download PDF