Simulating Terahertz Field-Induced Ferroelectricity in Quantum Paraelectric SrTiO3
Artikel i vetenskaplig tidskrift, 2022
Recent experiments have demonstrated that light can induce a transition from the quantum paraelectric to the ferroelectric phase of SrTiO3. Here, we investigate this terahertz field-induced ferroelectric phase transition by solving the time-dependent lattice Schrödinger 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 nonoscillatory second harmonic generation signal can be evidence of ferroelectricity in SrTiO3. We reveal the microscopic details of this exotic phase transition and highlight that this phenomenon is a unique behavior of the quantum paraelectric phase.
Författare
Dongbin Shin
Max-Planck-Gesellschaft
Simone Latini
Max-Planck-Gesellschaft
Christian Schäfer
Max-Planck-Gesellschaft
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Shunsuke A. Sato
University of Tsukuba
Max-Planck-Gesellschaft
Edoardo Baldini
The University of Texas at Austin
Umberto De Giovannini
Universita degli Studi di Palermo
Max-Planck-Gesellschaft
Hannes Hübener
Max-Planck-Gesellschaft
Angel Rubio
Universidad del Pais Vasco / Euskal Herriko Unibertsitatea
Flatiron Institute
Max-Planck-Gesellschaft
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 129 16 167401Kvantplasmonik – en teknologi för foton-fotonväxelverkan på kvantnivå vid rumstemperatur
Vetenskapsrådet (VR) (2016-06059), 2017-01-01 -- 2022-12-31.
Ämneskategorier
Atom- och molekylfysik och optik
Annan fysik
Den kondenserade materiens fysik
DOI
10.1103/PhysRevLett.129.167401
PubMed
36306771