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research article
Orbital Magnetization as a Local Property
Bianco, Raffaello
•
Resta, Raffaele
The modern expressions for polarization P and orbital magnetization M are k-space integrals. But a genuine bulk property should also be expressible in r space, as an unambiguous function of the ground-state density matrix, "nearsighted'' in insulators, independently of the boundary conditions-either periodic or open. While P-owing to its "quantum'' indeterminacy-is not a bulk property in this sense, M is. We provide its r-space expression for any insulator, even with a nonzero Chern invariant. Simulations on a model Hamiltonian validate our theory. DOI: 10.1103/PhysRevLett.110.087202
Type
research article
Web of Science ID
WOS:000315284800019
Author(s)
Bianco, Raffaello
•
Resta, Raffaele
Date Issued
2013
Publisher
Published in
Volume
110
Issue
8
Article Number
087202
Peer reviewed
REVIEWED
Written at
EPFL
EPFL units
Available on Infoscience
March 28, 2013
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