Soft phonons and structural phase transitions in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$

H. Kimura, Y. Noda, H. Goka +3

Soft phonon behavior associated with a structural phase transition from the low-temperature-orthorhombic (LTO) phase ($Bmab$ symmetry) to the low-temperature-tetragonal (LTT) phase…