Tensile and compressive strain tuning of a Kondo lattice
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917677669285888 |
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| author | Panja, Soumendra Nath Jesche, Anton Tang, Nan Gegenwart, Philipp |
| author_facet | Panja, Soumendra Nath Jesche, Anton Tang, Nan Gegenwart, Philipp |
| contents | We present electrical resistivity measurements on the prototypical heavy-fermion metal YbRh$_{2}$Si$_{2}$ (YRS) under $a$-axis tensile and compressive strain and focus on the evolution of the resistivity maximum near 136~K that arises from the interplay of the Kondo effect and the crystal electric field (CEF) splitting. While compressive strain reduces $T_{\rm max}$, similar as previously reported for hydrostatic pressure, $T_{\rm max}$ is enhanced up to 145~K for 0.13\% tensile strain. Model calculations for the strain effect on CEF splitting in YRS reveal a negligible shift of the levels. Instead, the enhancement of the resistivity maximum indicates a 20\% increase of the Kondo temperature. This opens the perspective to access the hidden zero-field QCP in pure YRS. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_00630 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Tensile and compressive strain tuning of a Kondo lattice Panja, Soumendra Nath Jesche, Anton Tang, Nan Gegenwart, Philipp Strongly Correlated Electrons We present electrical resistivity measurements on the prototypical heavy-fermion metal YbRh$_{2}$Si$_{2}$ (YRS) under $a$-axis tensile and compressive strain and focus on the evolution of the resistivity maximum near 136~K that arises from the interplay of the Kondo effect and the crystal electric field (CEF) splitting. While compressive strain reduces $T_{\rm max}$, similar as previously reported for hydrostatic pressure, $T_{\rm max}$ is enhanced up to 145~K for 0.13\% tensile strain. Model calculations for the strain effect on CEF splitting in YRS reveal a negligible shift of the levels. Instead, the enhancement of the resistivity maximum indicates a 20\% increase of the Kondo temperature. This opens the perspective to access the hidden zero-field QCP in pure YRS. |
| title | Tensile and compressive strain tuning of a Kondo lattice |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2402.00630 |