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Unlocking Static Polarization and Strain Density Waves in Perovskites by Softening a Hidden Antiferrodistortive Tilt Gradient Mode
Yajun Zhang, Devesh R. Kripalani, Xu He +9
Spin density waves (SDWs) represent a fundamental paradigm of spatially modulated order in condensed matter systems, yet their electrical and mechanical analogues polarization and…
Mechanical coupling of polar topologies and oxygen octahedra rotations in PbTiO/SrTiO superlattices
Fernando Gómez-Ortiz, Louis Bastogne, Xu He +1
PbTiO/SrTiO artificial superlattices recently emerged as a prototypical platform for the emergence and study of polar topologies. While previous studies mainly focused on t…
Orbital Order Triggered Out-of-Plane Ferroelectricity in Magnetic Transition Metal di-halide Monolayers
Xiao-Feng Luo, Xu He, Rui Wang +2
Although multiferroics have undergone extensive examination for several decades, the occurrence of ferroelectricity induced by orbital order is only scarcely documented. In this st…
The anti-distortive polaron : an alternative mechanism for lattice-mediated charge trapping
Hamideh Hassani, Eric Bousquet, Xu He +2
Polarons can naturally form in materials from the interaction of extra charge carriers with the atomic lattice. Ubiquitous, they are central to various topics and phenomena such as…
Switchable Skyrmion-Antiskyrmion Tubes in Rhombohedral BaTiO and Related Materials
Fernando Gómez-Ortiz, Louis Bastogne, Sriram Anand +3
Skyrmions are stable topological textures that have garnered substantial attention within the ferroelectric community for their exotic functional properties. While previous studies…