Tunneling splitting of Jahn-Teller ions in oxides

García Fernández, Pablo (físico); Trueba Pérez, Álvaro; Barriuso Pérez, María Teresa; Aramburu-Zabala Higuera, José Antonio; Moreno Mas, Miguel

doi:10.1103/PhysRevLett.104.035901

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TunnelingSplittingJa ... (167.9Kb)

Identificadores

URI: https://hdl.handle.net/10902/28559

DOI: 10.1103/PhysRevLett.104.035901

ISSN: 0031-9007

ISSN: 1079-7114

Fecha

2010-01

Derechos

Publicado en

Physical Review Letters, 2010, 104(3), 035901

Editorial

American Physical Society

Enlace a la publicación

https://doi.org/10.1103/PhysRevLett.104.035901

Resumen/Abstract

The magnitude of tunneling splitting, 3?, that governs decoherence in quantum systems under symmetric potentials, is frequently unknown. Using first-principles calculations, we have obtained 3? for a number of E?e Jahn-Teller impurities in solids. Calculated values span 6 orders of magnitude on passing from KCl?Ag2+ to MgO?Cu2+. Values associated with Cu2+- and Ag2+-doped MgO are 2 orders of magnitude larger than those previously assumed and consistent with the existence of a dynamic Jahn-Teller effect. The origin and enhancement with pressure of these high 3? values is discussed in detail.