Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system

V. Sunko; F. Mazzola; S. Kitamura; S. Khim; P. Kushwaha; O. J. Clark; M. Watson; I. Markovic; D. Biswas; L. Pourovskii; T. K. Kim; T. -L. Lee; P. K. Thakur; H. Rosner; A. Georges; R. Moessner; T. Oka; A. P. Mackenzie; P. D. C. King

doi:10.1126/sciadv.aaz0611

Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system

V. Sunko
, F. Mazzola
, S. Kitamura
, S. Khim
, P. Kushwaha
, O. J. Clark
, M. Watson
, I. Markovic
, D. Biswas
, L. Pourovskii
, T. K. Kim
, T. -L. Lee
, P. K. Thakur
, H. Rosner
, A. Georges
, R. Moessner
, T. Oka^*
, A. P. Mackenzie^*
, P. D. C. King^*

^*Corresponding author for this work

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

Abstract

A nearly free electron metal and a Mott insulating state can be thought of as opposite ends of the spectrum of possibilities for the motion of electrons in a solid. Understanding their interaction lies at the heart of the correlated electron problem. In the magnetic oxide metal PdCrO₂, nearly free and Mott-localized electrons exist in alternating layers, forming natural heterostructures. Using angle-resolved photoemission spectroscopy, quantitatively supported by a strong coupling analysis, we show that the coupling between these layers leads to an “intertwined” excitation that is a convolution of the charge spectrum of the metallic layer and the spin susceptibility of the Mott layer. Our findings establish PdCrO₂ as a model system in which to probe Kondo lattice physics and also open new routes to use the a priori nonmagnetic probe of photoemission to gain insights into the spin susceptibility of correlated electron materials.

Original language	English
Article number	eaaz0611
Journal	Science Advances
Volume	6
Issue number	6
DOIs	https://doi.org/10.1126/sciadv.aaz0611
Publication status	Published - 7 Feb 2020

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Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Engineered Quantum States: Engineered quantum states via atmoic-scale assembly of artificial 2D heterostructures
King, P. (PI)
Leverhulme Trust
1/08/17 → 31/07/22
Project: Standard
ERC Starting Grant QUESTDO: H2020 ERC Starting Grant QUESTDO
King, P. (PI)
European Research Council
1/01/17 → 31/12/21
Project: Fellowship

Probing spin correlations using angle resolved photoemission in a coupled metallic/Mott insulator system (dataset)
Sunko, V. (Creator), Mazzola, F. (Creator), . Kitamura, S. (Creator), Khim, S. (Creator), Kushwaha, P. (Creator), Clark, O. J. (Creator), Watson, M. D. (Creator), Biswas, D. (Creator), Pourovskii, L. (Creator), Kim, K. (Creator), Lee, T. (Creator), Thakur, P. (Creator), Rosner, H. (Creator), Georges, A. (Creator), Moessner, R. (Creator), Oka, T. (Creator), Mackenzie, A. P. (Creator) & King, P. D. (Creator), University of St Andrews, 5 Sept 2019
DOI: 10.17630/54473334-dab4-4598-ae1a-ad38c2271d35
Dataset

File

Angle resolved photoemission spectroscopy of delafossite metals
Sunko, V. (Author), King, P. (Supervisor) & Mackenzie, A. (Supervisor), 24 Jun 2019
Student thesis: Doctoral Thesis (PhD)

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Sunko, V., Mazzola, F., Kitamura, S., Khim, S., Kushwaha, P., Clark, O. J., Watson, M., Markovic, I., Biswas, D., Pourovskii, L., Kim, T. K., Lee, T. .-L., Thakur, P. K., Rosner, H., Georges, A., Moessner, R., Oka, T., Mackenzie, A. P., & King, P. D. C. (2020). Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system. Science Advances, 6(6), Article eaaz0611. https://doi.org/10.1126/sciadv.aaz0611

@article{bbbdbfea62f04743a253ee7052f3a86d,

title = "Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system",

abstract = "A nearly free electron metal and a Mott insulating state can be thought of as opposite ends of the spectrum of possibilities for the motion of electrons in a solid. Understanding their interaction lies at the heart of the correlated electron problem. In the magnetic oxide metal PdCrO2, nearly free and Mott-localized electrons exist in alternating layers, forming natural heterostructures. Using angle-resolved photoemission spectroscopy, quantitatively supported by a strong coupling analysis, we show that the coupling between these layers leads to an “intertwined” excitation that is a convolution of the charge spectrum of the metallic layer and the spin susceptibility of the Mott layer. Our findings establish PdCrO2 as a model system in which to probe Kondo lattice physics and also open new routes to use the a priori nonmagnetic probe of photoemission to gain insights into the spin susceptibility of correlated electron materials.",

author = "V. Sunko and F. Mazzola and S. Kitamura and S. Khim and P. Kushwaha and Clark, \{O. J.\} and M. Watson and I. Markovic and D. Biswas and L. Pourovskii and Kim, \{T. K.\} and Lee, \{T. -L.\} and Thakur, \{P. K.\} and H. Rosner and A. Georges and R. Moessner and T. Oka and Mackenzie, \{A. P.\} and King, \{P. D. C.\}",

note = "Funding: European Research Council (Grant Nos. ERC-714193-QUESTDO and ERC-319286-QMAC), the Royal Society, the Leverhulme Trust (Grant Nos. RL-2016-006 and PLP-2015-144R); EPSRC for PhD studentship support through grant numbers EP/L015110/1 and EP/K503162/1. I.M. acknowledges PhD studentship support from the IMPRS for the Chemistry and Physics of Quantum Materials",

year = "2020",

month = feb,

day = "7",

doi = "10.1126/sciadv.aaz0611",

language = "English",

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Sunko, V, Mazzola, F, Kitamura, S, Khim, S, Kushwaha, P, Clark, OJ, Watson, M, Markovic, I, Biswas, D, Pourovskii, L, Kim, TK, Lee, T-L, Thakur, PK, Rosner, H, Georges, A, Moessner, R, Oka, T, Mackenzie, AP & King, PDC 2020, 'Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system', Science Advances, vol. 6, no. 6, eaaz0611. https://doi.org/10.1126/sciadv.aaz0611

TY - JOUR

T1 - Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system

AU - Sunko, V.

AU - Mazzola, F.

AU - Kitamura, S.

AU - Khim, S.

AU - Kushwaha, P.

AU - Clark, O. J.

AU - Watson, M.

AU - Markovic, I.

AU - Biswas, D.

AU - Pourovskii, L.

AU - Kim, T. K.

AU - Lee, T. -L.

AU - Thakur, P. K.

AU - Rosner, H.

AU - Georges, A.

AU - Moessner, R.

AU - Oka, T.

AU - Mackenzie, A. P.

AU - King, P. D. C.

N1 - Funding: European Research Council (Grant Nos. ERC-714193-QUESTDO and ERC-319286-QMAC), the Royal Society, the Leverhulme Trust (Grant Nos. RL-2016-006 and PLP-2015-144R); EPSRC for PhD studentship support through grant numbers EP/L015110/1 and EP/K503162/1. I.M. acknowledges PhD studentship support from the IMPRS for the Chemistry and Physics of Quantum Materials

PY - 2020/2/7

Y1 - 2020/2/7

N2 - A nearly free electron metal and a Mott insulating state can be thought of as opposite ends of the spectrum of possibilities for the motion of electrons in a solid. Understanding their interaction lies at the heart of the correlated electron problem. In the magnetic oxide metal PdCrO2, nearly free and Mott-localized electrons exist in alternating layers, forming natural heterostructures. Using angle-resolved photoemission spectroscopy, quantitatively supported by a strong coupling analysis, we show that the coupling between these layers leads to an “intertwined” excitation that is a convolution of the charge spectrum of the metallic layer and the spin susceptibility of the Mott layer. Our findings establish PdCrO2 as a model system in which to probe Kondo lattice physics and also open new routes to use the a priori nonmagnetic probe of photoemission to gain insights into the spin susceptibility of correlated electron materials.

AB - A nearly free electron metal and a Mott insulating state can be thought of as opposite ends of the spectrum of possibilities for the motion of electrons in a solid. Understanding their interaction lies at the heart of the correlated electron problem. In the magnetic oxide metal PdCrO2, nearly free and Mott-localized electrons exist in alternating layers, forming natural heterostructures. Using angle-resolved photoemission spectroscopy, quantitatively supported by a strong coupling analysis, we show that the coupling between these layers leads to an “intertwined” excitation that is a convolution of the charge spectrum of the metallic layer and the spin susceptibility of the Mott layer. Our findings establish PdCrO2 as a model system in which to probe Kondo lattice physics and also open new routes to use the a priori nonmagnetic probe of photoemission to gain insights into the spin susceptibility of correlated electron materials.

U2 - 10.1126/sciadv.aaz0611

DO - 10.1126/sciadv.aaz0611

M3 - Article

SN - 2375-2548

VL - 6

JO - Science Advances

JF - Science Advances

IS - 6

M1 - eaaz0611

ER -

Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system

Abstract

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Projects

Engineered Quantum States: Engineered quantum states via atmoic-scale assembly of artificial 2D heterostructures

ERC Starting Grant QUESTDO: H2020 ERC Starting Grant QUESTDO

Datasets

Probing spin correlations using angle resolved photoemission in a coupled metallic/Mott insulator system (dataset)

Student theses

Angle resolved photoemission spectroscopy of delafossite metals

Cite this