High temperature antiferromagnetism in Yb based heavy fermion systems proximate to a Kondo insulator
Given the parallelism between the physical properties of Ce and Yb based magnets and heavy fermions due to the electron-hole symmetry, it has been rather odd that the transition temperature of the Yb based compounds is normally very small, as low as \(\sim\) 1 K or even lower, whereas Ce counterpart...
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Published in | arXiv.org |
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Main Authors | , , , , , , , , , , , |
Format | Paper Journal Article |
Language | English |
Published |
Ithaca
Cornell University Library, arXiv.org
29.03.2021
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Subjects | |
Online Access | Get full text |
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Summary: | Given the parallelism between the physical properties of Ce and Yb based magnets and heavy fermions due to the electron-hole symmetry, it has been rather odd that the transition temperature of the Yb based compounds is normally very small, as low as \(\sim\) 1 K or even lower, whereas Ce counterparts may often have the transition temperature well exceeding 10 K. Here, we report our experimental discovery of the transition temperature reaching 20 K for the first time in a Yb based compound at ambient pressure. The Mn substitution at the Al site in an intermediate valence state of \(\alpha\)-YbAlB\(_{4}\) not only induces antiferromagnetic transition at a record high temperature of 20 K but also transforms the heavy fermion liquid state in \(\alpha\)-YbAlB\(_{4}\) into a highly resistive metallic state proximate to a Kondo insulator. |
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ISSN: | 2331-8422 |
DOI: | 10.48550/arxiv.1803.09366 |