Sequential localization of a complex electron fluid

Valentina Martelli; Ang Cai; Emilian M. Nica; Mathieu Taupin; Andrey Prokofiev; Chia Chuan Liu; Hsin Hua Lai; Rong Yu; Kevin Ingersent; Robert Küchler; André M. Strydom; Diana Geiger; Jonathan Haenel; Julio Larrea; Qimiao Si; Silke Paschen

doi:10.1073/pnas.1908101116

Sequential localization of a complex electron fluid

Valentina Martelli, Ang Cai, Emilian M. Nica, Mathieu Taupin, Andrey Prokofiev, Chia Chuan Liu, Hsin Hua Lai, Rong Yu, Kevin Ingersent, Robert Küchler, André M. Strydom, Diana Geiger, Jonathan Haenel, Julio Larrea, Qimiao Si, Silke Paschen

Physics

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

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.

Original language	English
Pages (from-to)	17701-17706
Number of pages	6
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	116
Issue number	36
DOIs	https://doi.org/10.1073/pnas.1908101116
Publication status	Published - 3 Sept 2019

Keywords

Electron localization-delocalization transition
Heavy fermion compounds
Kondo destruction
Quantum criticality
Spin-orbital entwining

ASJC Scopus subject areas

Multidisciplinary

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10.1073/pnas.1908101116

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Martelli, V., Cai, A., Nica, E. M., Taupin, M., Prokofiev, A., Liu, C. C., Lai, H. H., Yu, R., Ingersent, K., Küchler, R., Strydom, A. M., Geiger, D., Haenel, J., Larrea, J., Si, Q., & Paschen, S. (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. https://doi.org/10.1073/pnas.1908101116

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title = "Sequential localization of a complex electron fluid",

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.",

keywords = "Electron localization-delocalization transition, Heavy fermion compounds, Kondo destruction, Quantum criticality, Spin-orbital entwining",

author = "Valentina Martelli and Ang Cai and Nica, {Emilian M.} and Mathieu Taupin and Andrey Prokofiev and Liu, {Chia Chuan} and Lai, {Hsin Hua} and Rong Yu and Kevin Ingersent and Robert K{\"u}chler and Strydom, {Andr{\'e} M.} and Diana Geiger and Jonathan Haenel and Julio Larrea and Qimiao Si and Silke Paschen",

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doi = "10.1073/pnas.1908101116",

language = "English",

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Martelli, V, Cai, A, Nica, EM, Taupin, M, Prokofiev, A, Liu, CC, Lai, HH, Yu, R, Ingersent, K, Küchler, R, Strydom, AM, Geiger, D, Haenel, J, Larrea, J, Si, Q & Paschen, S 2019, 'Sequential localization of a complex electron fluid', Proceedings of the National Academy of Sciences of the United States of America, vol. 116, no. 36, pp. 17701-17706. https://doi.org/10.1073/pnas.1908101116

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T1 - Sequential localization of a complex electron fluid

AU - Martelli, Valentina

AU - Cai, Ang

AU - Nica, Emilian M.

AU - Taupin, Mathieu

AU - Prokofiev, Andrey

AU - Liu, Chia Chuan

AU - Lai, Hsin Hua

AU - Yu, Rong

AU - Ingersent, Kevin

AU - Küchler, Robert

AU - Strydom, André M.

AU - Geiger, Diana

AU - Haenel, Jonathan

AU - Larrea, Julio

AU - Si, Qimiao

AU - Paschen, Silke

PY - 2019/9/3

Y1 - 2019/9/3

N2 - 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.

AB - 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.

KW - Electron localization-delocalization transition

KW - Heavy fermion compounds

KW - Kondo destruction

KW - Quantum criticality

KW - Spin-orbital entwining

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Sequential localization of a complex electron fluid

Abstract

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