Bulk Topological Proximity Effect

Timothy H. Hsieh, Hiroaki Ishizuka, Leon Balents, Taylor L. Hughes

Research output: Contribution to journalArticle

Abstract

Existing proximity effects stem from systems with a local order parameter, such as a local magnetic moment or a local superconducting pairing amplitude. Here, we demonstrate that despite lacking a local order parameter, topological phases also may give rise to a proximity effect of a distinctively inverted nature. We focus on a general construction in which a topological phase is extensively coupled to a second system, and we argue that, in many cases, the inverse topological order will be induced on the second system. To support our arguments, we rigorously establish this "bulk topological proximity effect" for all gapped free-fermion topological phases and representative integrable models of interacting topological phases. We present a terrace construction which illustrates the phenomenological consequences of this proximity effect. Finally, we discuss generalizations beyond our framework, including how intrinsic topological order may also exhibit this effect.

Original languageEnglish (US)
Article number086802
JournalPhysical review letters
Volume116
Issue number8
DOIs
StatePublished - Feb 26 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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