Identification of chirality of chiral multifold fermions in anti-crystals
arXiv:2001.01311
Abstract
The chirality of chiral multifold fermions in reciprocal space is related to the chirality of the crystal lattice structure in real space. In this work, we propose a strategy to detect and identify opposite-chirality multifold fermions in nonmagnetic systems by means of second-order optical transports. The chiral crystals are related by an inversion operation and cannot overlap with each other by any experimental operation, and the chiral multifold fermions in the crystals host opposite chiralities for a given k-point. A change of chirality is indicated by a sign change of the second-order charge current dominated by chiral fermions. This strategy is effective to study the relationship between chiralities in reciprocal and real spaces by utilizing bulk transport.
three figures
References in corpus (16)
- Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
- Observation of the nonlinear Hall effect under time reversal symmetric conditions
- Quantized circular photogalvanic effect in Weyl semimetals
- Topological quantum properties of chiral crystals
- Multiple types of topological fermions in transition metal silicides
- Direct optical detection of Weyl fermion chirality in a topological semimetal
- Electrically switchable Berry curvature dipole in the monolayer topological insulator WTe2
- Large Fermi Arcs in Unconventional Weyl Semimetal RhSi
- Discovery of topological chiral crystals with helicoid arc states
- New classes of chiral topological nodes with non-contractible surface Fermi arcs in CoSi
- Double-Weyl phonons in transition-metal monosilicides
- Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi
- Chiral Topological Semimetal with Multifold Band Crossings and Long Fermi arcs
- Chiral Optical Response of Multifold Fermions
- Current-voltage characteristic and shot noise of shift current photovoltaics
- Strong bulk photovoltaic effect in chiral crystal in the visible spectrum