Skip to Main content Skip to Navigation
Journal articles

Intrinsic vibrational angular momentum from non-adiabatic effects in non-collinear magnetic molecules

Abstract : We show that in noncollinear magnetic molecules, nonadiabatic (dynamical) effects due to the electron-vibron coupling are time-reversal symmetry breaking interactions for the vibrational field. Because the electronic wave function cannot be chosen as real in these molecules, a nonzero geometric vector potential (Berry connection) arises. As a result, an intrinsic nonzero vibrational angular momentum occurs even for nondegenerate modes and in the absence of external probes. The vibronic modes can then be seen as elementary quantum particles carrying a sizeable angular momentum. As a proof of concept, we demonstrate the magnitude of this topological effect by performing nonadiabatic first principles calculations on platinum clusters and by showing that these molecules host sizeable intrinsic phonon angular momenta comparable to the orbital electronic ones in itinerant ferromagnets.
Complete list of metadata

https://hal.sorbonne-universite.fr/hal-03268586
Contributor : Hal Sorbonne Université Gestionnaire Connect in order to contact the contributor
Submitted on : Wednesday, June 23, 2021 - 12:19:21 PM
Last modification on : Tuesday, July 13, 2021 - 3:26:46 AM
Long-term archiving on: : Friday, September 24, 2021 - 6:34:03 PM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2021-12-23

Please log in to resquest access to the document

Identifiers

Citation

Oliviero Bistoni, Francesco Mauri, Matteo Calandra. Intrinsic vibrational angular momentum from non-adiabatic effects in non-collinear magnetic molecules. Physical Review Letters, American Physical Society, 2021, 126 (22), ⟨10.1103/PhysRevLett.126.225703⟩. ⟨hal-03268586⟩

Share

Metrics

Record views

73