Deuteration removes quantum dipolar defects from KDP crystals

Bingjia Yang, Pinchen Xie, Roberto Car

The structural, dielectric, and thermodynamic properties of the hydrogen-bonded ferroelectric crystal potassium dihydrogen phosphate ($\mathbf{K}{\mathbf{H}}_2\mathbf{P}{\mathbf{O}}_4$), KDP for short, differ si…