Controlling the properties of PbTiO 3 / SrTiO 3 superlattices by photoexcited carriers - CentraleSupélec Access content directly
Journal Articles Physical Review B Year : 2022

Controlling the properties of PbTiO 3 / SrTiO 3 superlattices by photoexcited carriers

Abstract

The effect of light on properties of PbTiO3/SrTiO3 superlattices is studied using first-principles calculations in their paraelectric phase p as well as in the, c, r and aa phases that are defined by polarization lying along [001], [11v] and [110] directions, respectively. Whilst the r phase is the ground state in dark conditions, illumination triggers a rotation of the polarization towards the outof-plane direction, which results in the r phase transforming into a c phase at large concentration of photoexcited carriers. We further reveal that a space charge region of free carriers builds up at the interface under illumination, implying that these superlattices can be thought as acting as p-in junctions under light. These free charges screen the polarization discontinuity at the interface, effectively reducing the electrostatic depolarizing field.
Fichier principal
Vignette du fichier
Charles Paillard - Carmel. 10.1103-PhysRevB.106.L220101.pdf (1.21 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03899818 , version 1 (15-12-2022)

Identifiers

Cite

Carmel Dansou, Charles Paillard, Laurent Bellaiche. Controlling the properties of PbTiO 3 / SrTiO 3 superlattices by photoexcited carriers. Physical Review B, 2022, 106 (22), pp.L220101. ⟨10.1103/PhysRevB.106.L220101⟩. ⟨hal-03899818⟩
10 View
40 Download

Altmetric

Share

Gmail Facebook X LinkedIn More