Prospects and applications near ferroelectric quantum phase transitions: a key issues review

P. Chandra, Gilbert G. Lonzarich, S. E. Rowley, J. F. Scott

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

The emergence of complex and fascinating states of quantum matter in the neighborhood of zero temperature phase transitions suggests that such quantum phenomena should be studied in a variety of settings. Advanced technologies of the future may be fabricated from materials where the cooperative behavior of charge, spin and current can be manipulated at cryogenic temperatures. The progagating lattice dynamics of displacive ferroelectrics make them appealing for the study of quantum critical phenomena that is characterized by both space- and time-dependent quantities. In this Key Issues article we aim to provide a self-contained overview of ferroelectrics near quantum phase transitions. Unlike most magnetic cases, the ferroelectric quantum critical point can be tuned experimentally to reside at, above or below its upper critical dimension; this feature allows for detailed interplay between experiment and theory using both scaling and self-consistent field models. Additional degrees of freedom like charge and spin can be added and characterized systematically. Satellite memories, electrocaloric cooling and low-loss phased-array radar are among possible applications of low-temperature ferroelectrics. We end with open questions for future research that include textured polarization states and unusual forms of superconductivity that remain to be understood theoretically.
Original languageEnglish
Article number112502
Number of pages24
JournalReports on Progress in Physics
Volume80
Issue number11
Early online date28 Sept 2017
DOIs
Publication statusPublished - Nov 2017

Keywords

  • Quantum phase transitions
  • Ferroelectrics
  • Quantum criticality

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