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Title: Orbital Rashba Effect & Its Implications
Originating Office: IAS
Speaker: Han, Jung Hoon
Issue Date: 14-Dec-2012
Event Date: 14-Dec-2012
Group/Series/Folder: Record Group 8.15 - Institute for Advanced Study
Series 3 - Audio-visual Materials
Location: 8.15:3 box 1.8
Notes: IAS Asia Pacific Workshop on Condensed Matter Physics. Talk no. 9
Title from title slide.
Host: Institute for Advanced Study.
Sponsor: The Collaborative Research Fund (CRF), The Research Grants Council (RGC).
Abstract: The speaker presents a simple argument showing that the natural consequence of inversion symmetry breaking (ISB) in degenerate-orbital band structure is the emergence of orbital chirality, or chiral orbital angular momentum. This is the analogue of spin angular momentum chirality familiar from the Rashba effect but occurs in the orbital sector, even in the absence of spin-orbit interaction. Recent experimental demonstration by circularly polarized ARPES experiment confirms our claim. We explore the minimal model Hamiltonian following from our multi-band picture with ISB both in the case of non-magnetic and magnetic band structures. In the latter case we show that the band-specific orbital chirality is manifested in the form of band-dependent Rashba parameter.
Duration: 36 min.
Appears in Series:8.15:3 - Audio-visual Materials
Videos for Public -- Distinguished Lectures