From flexoelectricity to absolute deformation potentials: The case of SrTiO${}_3$

Abstract

Based on recent developments in the first-principles theory of flexoelectricity, we generalize the concept of absolute deformation potential to arbitrary nonpiezoelectric insulators and deformation fields. To demonstrate our formalism, we calculate the response of the band edges of SrTiO${}_3$ to both dynamic (sound waves) and static (bending) mechanical loads, respectively at the bulk level and in a slab geometry. Our results have important implications for the understanding of strain-gradient-related phenomena in crystalline insulators, formally unifying the description of band-structure and electrostatic effects.

7 pages, 2 figures

References in corpus (5)

• Strain gradient induced polarization in SrTiO3 single crystals
• Towards a bulk theory of flexoelectricity
• Surface control of flexoelectricity
• Giant Oscillating Thermopower at Oxide Interfaces
• Interface superconductivity in LaAlO${}_3$-SrTiO${}_3$ heterostructures

Cited by in corpus (3)

• Unified ab initio formulation of flexoelectricity and strain-gradient elasticity
• Tuning flexoelectricty and electronic properties of zig-zag graphene nanoribbons by functionalization
• Band bending and ratcheting explain triboelectricity in a flexoelectric contact diode