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Journal Article

Sequential localization of a complex electron fluid

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Küchler,  Robert
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Martelli, V., Cai, A., Nica, E. M., Taupin, M., Prokofiev, A., Liu, C.-C., et al. (2019). Sequential localization of a complex electron fluid. Proceedings of the National Academy of Sciences of the United States of America, 116(36), 17701-17706. doi:10.1073/pnas.1908101116.


Cite as: https://hdl.handle.net/21.11116/0000-0004-BDB0-0
Abstract
Complex and correlated quantum systems with promise for new functionality often involve entwined electronic degrees of freedom. In such materials, highly unusual properties emerge and could be the result of electron localization. Here, a cubic heavy fermion metal governed by spins and orbitals is chosen as a model system for this physics. Its properties are found to originate from surprisingly simple low-energy behavior, with 2 distinct localization transitions driven by a single degree of freedom at a time. This result is unexpected, but we are able to understand it by advancing the notion of sequential destruction of an SU(4) spin-orbital-coupled Kondo entanglement. Our results implicate electron localization as a unified framework for strongly correlated materials and suggest ways to exploit multiple degrees of freedom for quantum engineering. Copyright © 2019 the Author(s). Published by PNAS.