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Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7)
Magnetic fluctuations induced by geometric frustration of local Ir-spins disturb the formation of long-range magnetic order in the family of pyrochlore iridates. As a consequence, Pr(2)Ir(2)O(7) lies at a tuning-free antiferromagnetic-to-paramagnetic quantum critical point and exhibits an array of c...
Autores principales: | , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7925525/ https://www.ncbi.nlm.nih.gov/pubmed/33654070 http://dx.doi.org/10.1038/s41467-021-21698-z |
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author | Kavai, Mariam Friedman, Joel Sherman, Kyle Gong, Mingda Giannakis, Ioannis Hajinazar, Samad Hu, Haoyu Grefe, Sarah E. Leshen, Justin Yang, Qiu Nakatsuji, Satoru Kolmogorov, Aleksey N. Si, Qimiao Lawler, Michael Aynajian, Pegor |
author_facet | Kavai, Mariam Friedman, Joel Sherman, Kyle Gong, Mingda Giannakis, Ioannis Hajinazar, Samad Hu, Haoyu Grefe, Sarah E. Leshen, Justin Yang, Qiu Nakatsuji, Satoru Kolmogorov, Aleksey N. Si, Qimiao Lawler, Michael Aynajian, Pegor |
author_sort | Kavai, Mariam |
collection | PubMed |
description | Magnetic fluctuations induced by geometric frustration of local Ir-spins disturb the formation of long-range magnetic order in the family of pyrochlore iridates. As a consequence, Pr(2)Ir(2)O(7) lies at a tuning-free antiferromagnetic-to-paramagnetic quantum critical point and exhibits an array of complex phenomena including the Kondo effect, biquadratic band structure, and metallic spin liquid. Using spectroscopic imaging with the scanning tunneling microscope, complemented with machine learning, density functional theory and theoretical modeling, we probe the local electronic states in Pr(2)Ir(2)O(7) and find an electronic phase separation. Nanoscale regions with a well-defined Kondo resonance are interweaved with a non-magnetic metallic phase with Kondo-destruction. These spatial nanoscale patterns display a fractal geometry with power-law behavior extended over two decades, consistent with being in proximity to a critical point. Our discovery reveals a nanoscale tuning route, viz. using a spatial variation of the electronic potential as a means of adjusting the balance between Kondo entanglement and geometric frustration. |
format | Online Article Text |
id | pubmed-7925525 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-79255252021-03-21 Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7) Kavai, Mariam Friedman, Joel Sherman, Kyle Gong, Mingda Giannakis, Ioannis Hajinazar, Samad Hu, Haoyu Grefe, Sarah E. Leshen, Justin Yang, Qiu Nakatsuji, Satoru Kolmogorov, Aleksey N. Si, Qimiao Lawler, Michael Aynajian, Pegor Nat Commun Article Magnetic fluctuations induced by geometric frustration of local Ir-spins disturb the formation of long-range magnetic order in the family of pyrochlore iridates. As a consequence, Pr(2)Ir(2)O(7) lies at a tuning-free antiferromagnetic-to-paramagnetic quantum critical point and exhibits an array of complex phenomena including the Kondo effect, biquadratic band structure, and metallic spin liquid. Using spectroscopic imaging with the scanning tunneling microscope, complemented with machine learning, density functional theory and theoretical modeling, we probe the local electronic states in Pr(2)Ir(2)O(7) and find an electronic phase separation. Nanoscale regions with a well-defined Kondo resonance are interweaved with a non-magnetic metallic phase with Kondo-destruction. These spatial nanoscale patterns display a fractal geometry with power-law behavior extended over two decades, consistent with being in proximity to a critical point. Our discovery reveals a nanoscale tuning route, viz. using a spatial variation of the electronic potential as a means of adjusting the balance between Kondo entanglement and geometric frustration. Nature Publishing Group UK 2021-03-02 /pmc/articles/PMC7925525/ /pubmed/33654070 http://dx.doi.org/10.1038/s41467-021-21698-z Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Kavai, Mariam Friedman, Joel Sherman, Kyle Gong, Mingda Giannakis, Ioannis Hajinazar, Samad Hu, Haoyu Grefe, Sarah E. Leshen, Justin Yang, Qiu Nakatsuji, Satoru Kolmogorov, Aleksey N. Si, Qimiao Lawler, Michael Aynajian, Pegor Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7) |
title | Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7) |
title_full | Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7) |
title_fullStr | Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7) |
title_full_unstemmed | Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7) |
title_short | Inhomogeneous Kondo-lattice in geometrically frustrated Pr(2)Ir(2)O(7) |
title_sort | inhomogeneous kondo-lattice in geometrically frustrated pr(2)ir(2)o(7) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7925525/ https://www.ncbi.nlm.nih.gov/pubmed/33654070 http://dx.doi.org/10.1038/s41467-021-21698-z |
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