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

Orbital Magnetization as a Local Property / Bianco, R; Resta, R. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:8(2013), pp. 087202-087202. [10.1103/PhysRevLett.110.087202]

Orbital Magnetization as a Local Property

Bianco, R;Resta, R
2013

Abstract

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
2013
110
8
087202
087202
Orbital Magnetization as a Local Property / Bianco, R; Resta, R. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:8(2013), pp. 087202-087202. [10.1103/PhysRevLett.110.087202]
Bianco, R; Resta, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1299834
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