Nonstoichiometry and Weyl fermionic behavior in TaAs
J. Buckeridge, D. Jevdokimovs, C. R. A. Catlow, and A. A. Sokol
Phys. Rev. B 94, 180101(R) (2016) - Published 1 November, 2016
Effects of atomic short-range order on properties of the relaxor ferroelectric
Sergey Prosandeev and L. Bellaiche
Phys. Rev. B 94, 180102(R) (2016) - Published 3 November, 2016
Microscopic origin of entropy-driven polymorphism in hybrid organic-inorganic perovskite materials
Keith T. Butler, Katrine Svane, Gregor Kieslich, Anthony K. Cheetham, and Aron Walsh
Phys. Rev. B 94, 180103(R) (2016) - Published 7 November, 2016
Ultrafast terahertz-field-driven ionic response in ferroelectric
F. Chen et al.
Phys. Rev. B 94, 180104(R) (2016) - Published 22 November, 2016
Ferroelectric materials encode information through the displacement of atoms within the unit cell, but the ultimate speed limits governing how fast the polarization can change and how it responds to electric fields remain largely unknown. These processes in turn fundamentally determine the functionality of ferroelectric materials within devices. Here, the authors show that single-cycle light pulses at terahertz frequencies can be used as an ultrafast electric field to drive large amplitude rotations of the ferroelectric polarization on picosecond time scales within the prototypical ferroelectric BaTiO, probed by femtosecond x-ray scattering to directly resolve the motions of the atoms. These measurements are connected directly to first-principles molecular dynamics simulations of ultrafast electric-field-driven effects in ferroelectrics with good agreement obtained between experiment and theory.
Crystal structure, stability, and optoelectronic properties of the organic-inorganic wide-band-gap perovskite : Candidate for transparent conductor applications
Akash Kumar, K. R. Balasubramaniam, Jiban Kangsabanik, Vikram, and Aftab Alam
Phys. Rev. B 94, 180105(R) (2016) - Published 23 November, 2016







