Magnetic color symmetry of lattice rotations in a diamagnetic material

S. Denev, A. Kumar, M. D. Biegalski, H. W. Jang, C. M. Folkman, A. Vasudevarao, Y. Han, I. M. Reaney, S. Trolier-Mckinstry, C. B. Eom, D. G. Schlom, V. Gopalan

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Oxygen octahedral rotations are the most common phase transitions in perovskite crystal structures. Here we show that the color symmetry of such pure elastic distortions is isomorphic to magnetic point groups, which allows their probing through distinguishing polar versus magnetic symmetry. We demonstrate this isomorphism using nonlinear optical probing of the octahedral rotational transition in a compressively strained SrTiO3 thin film that exhibits ferroelectric (4mm) and antiferrodistortive (4′mm′) phases evolving through independent phase transitions. The approach has broader applicability for probing materials with lattice rotations that can be mapped to color groups.

Original languageEnglish (US)
Article number257601
JournalPhysical review letters
Volume100
Issue number25
DOIs
StatePublished - Jun 23 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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