Goldstone-like phonon modes in a (111)-strained perovskite
Marthinsen, Astrid; Griffin, Sinead M; Moreau, Magnus; Grande, Tor; Tybell, Per Thomas Martin; Selbach, Sverre Magnus
Journal article, Peer reviewed
Published version
Permanent lenke
http://hdl.handle.net/11250/2588201Utgivelsesdato
2018Metadata
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Originalversjon
10.1103/PhysRevMaterials.2.014404Sammendrag
Goldstone modes are massless particles resulting from spontaneous symmetry breaking. Although such modes are found in elementary particle physics as well as in condensed-matter systems like superfluid helium, superconductors, and magnons, structural Goldstone modes are rare. Epitaxial strain in thin films can induce structures and properties not accessible in bulk and has been intensively studied for (001)-oriented perovskite oxides. Here we predict Goldstone-like phonon modes in (111)-strained