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Updated: Jun 11, 2025

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Dynamic Jahn-Teller effect in the strong spin-orbit coupling regime
Ivica Živković1, Jian-Rui Soh2, Oleg Malanyuk2
1Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland. ivica.zivkovic@epfl.ch.
This study reveals Ba2MgReO6 as a dynamic Jahn-Teller system under strong spin-orbit coupling. It shows this instability creates a ground-state doublet, persisting to low temperatures.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
- Solid-State Chemistry
Background:
- Exotic quantum phases arise from complex interactions of charge, spin, lattice, and orbital degrees of freedom.
- The Jahn-Teller effect, a form of entangled behavior, involves lattice distortions that lift orbital degeneracy.
Purpose of the Study:
- To investigate the dynamic Jahn-Teller effect in the 5d1 double perovskite Ba2MgReO6.
- To explore the interplay between dynamic Jahn-Teller effects and strongly correlated electron behavior in the strong spin-orbit coupling regime.
Main Methods:
- Thermodynamic experiments
- Resonant inelastic x-ray scattering (RIXS)
- Quantum chemistry calculations
Main Results:
- Ba2MgReO6 exhibits a dynamic Jahn-Teller system in the strong spin-orbit coupling regime.
- The Jahn-Teller instability drives a ground-state doublet, resolving a key puzzle for this class of compounds.
- The dynamic ReO6 octahedra persist to low temperatures, coexisting with multipolar order.
Conclusions:
- Ba2MgReO6 is a rare example of a dynamic Jahn-Teller system with strong spin-orbit coupling.
- The findings provide insights into the interplay between dynamic Jahn-Teller effects and correlated electron phenomena.
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