Bibliographic Details
| Title: |
Simulating terahertz field-induced ferroelectricity in quantum paraelectric SrTiO$_3$ |
| Authors: |
Shin, Dongbin, Latini, Simone, Schafer, Christian, Sato, Shunsuke A., Baldini, Edoardo, De Giovannini, Umberto, Hubener, Hannes, Rubio, Angel |
| Publication Year: |
2021 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Materials Science |
| More Details: |
Recent experiments have demonstrated that light can induce a transition from the quantum paraelectric to the ferroelectric phase of SrTiO$_3$. Here, we investigate this terahertz field-induced ferroelectric phase transition by solving the time-dependent lattice Schr\"odinger equation based on first-principles calculations. We find that ferroelectricity originates from a light-induced mixing between ground and first excited lattice states in the quantum paraelectric phase. In agreement with the experimental findings, our study shows that the non-oscillatory second harmonic generation signal can be evidence of ferroelectricity in SrTiO$_3$. We reveal the microscopic details of this exotic phase transition and highlight that this phenomenon is a unique behavior of the quantum paraelectric phase.
Comment: 13 pages, 3 figures |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.129.167401 |
| Access URL: |
http://arxiv.org/abs/2106.03957 |
| Accession Number: |
edsarx.2106.03957 |
| Database: |
arXiv |
