Likewise, group theory helps predict the changes in physical properties that occur when a material undergoes a phase transition, for example, from a cubic to a tetrahedral crystalline form. An example is ferroelectric materials, where the change from a paraelectric to a ferroelectric state occurs at the Curie temperature and is related to a change from the high-symmetry paraelectric state to the lower symmetry ferroelectic state, accompanied by a so-called soft phonon mode, a vibrational lattice mode that goes to zero frequency at the transition.
কোন শব্দটি পরিবর্তনে 0 ফ্রিকোয়েন্সিতে পরিবর্তিত হয় এমন কম্পনশীল জাফরি মোডকে বর্ণনা করে?
soft phonon mode