Chirality and orbital order in charge density waves

Jasper van Wezel

Research output: Contribution to journalArticle (Academic Journal)

26 Citations (Scopus)

Abstract

Helical arrangements of spins are common among magnetic materials. The first material to harbor a corkscrew pattern of charge density, on the other hand, was discovered only very recently. The nature of the order parameter is of key relevance, since rotating a magnetic vector around any propagation vector trivially yields a helical pattern. In contrast, the purely scalar charge density cannot straightforwardly support a chiral state. Here we use a Landau order parameter analysis to resolve this paradox, and show that the chiral charge order may be understood as a form of orbital ordering. We discuss the microscopic mechanism driving the transition and show it to be of a general form, thus allowing for a broad class of materials to display this novel type of orbital-ordered chiral charge density wave.
Original languageEnglish
Article number67011
Pages (from-to)2-6
Number of pages5
JournalEPL
Volume96
DOIs
Publication statusPublished - 13 Dec 2011

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