Visualizing electronic chirality and Berry phases in graphene systems using photoemission with circularly polarized light

Y. Liu, G. Bian, T. Miller, T. C. Chiang

Research output: Contribution to journalArticlepeer-review

151 Scopus citations

Abstract

Electronic chirality near the Dirac point is a key property of graphene systems, which is revealed by the spectral intensity patterns as measured by angle-resolved photoemission spectroscopy under various polarization conditions. Specifically, the strongly modulated circular patterns for monolayer (bilayer) graphene rotate by ±90° (±45°) in changing from linearly to circularly polarized light; these angles are directly related to the phases of the wave functions and thus visually confirm the Berry's phase of π (2π) around the Dirac point. The details are verified by calculations.

Original languageEnglish
Article number166803
JournalPhysical Review Letters
Volume107
Issue number16
DOIs
StatePublished - Oct 10 2011
Externally publishedYes

Fingerprint

Dive into the research topics of 'Visualizing electronic chirality and Berry phases in graphene systems using photoemission with circularly polarized light'. Together they form a unique fingerprint.

Cite this