Simulating Terahertz Field-Induced Ferroelectricity in Quantum Paraelectric SrTiO3

Shin, Dongbin (författare): Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)

Latini, Simone (författare): Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)

Schäfer, Christian, 1989 (författare): Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Chalmers tekniska högskola,Chalmers University of Technology

Sato, Shunsuke A. (författare): University of Tsukuba,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)

De Giovannini, Umberto (författare): Universita degli Studi di Palermo,University of Palermo,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)

Hübener, Hannes (författare): Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)

Rubio, Angel (författare): Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),Flatiron Institute,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)

Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) Chalmers tekniska högskola (creator_code:org_t)

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Abstract Ämnesord

Stäng

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.

Av författaren/redakt...: Shin, Dongbin; Latini, Simone; Schäfer, Christi ...; Sato, Shunsuke A ...; Baldini, Edoardo; De Giovannini, U ...; visa fler...; Hübener, Hannes; Rubio, Angel; visa färre...

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