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| Format: | Preprint |
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2026
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| Online-Zugang: | https://arxiv.org/abs/2604.19078 |
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| author | Takubo, Kou Suzuki, Shintaro Yamamoto, Kohei Yamagami, Kohei Horio, Masafumi Ina, Toshiaki Nitta, Kiyohumi Mizumaki, Masaichiro Ikenaga, Eiji Matsumoto, Yosuke Wadati, Hiroki Nakatsuji, Satoru |
| author_facet | Takubo, Kou Suzuki, Shintaro Yamamoto, Kohei Yamagami, Kohei Horio, Masafumi Ina, Toshiaki Nitta, Kiyohumi Mizumaki, Masaichiro Ikenaga, Eiji Matsumoto, Yosuke Wadati, Hiroki Nakatsuji, Satoru |
| contents | Correlations between the localized and conductive spins/charges have been the central issue of various fascinating quantum phenomena found on itinerant electron systems. Here, the obvious multiplet structures are presented on the Mn 2$p$ to 3$d$ x-ray absorption for a heavy fermion $α$-(Yb,Lu)(Al$_{1-x}$Mn$_x$)B$_4$, indicating that the unoccupied electronic structure of the Mn site is described as the correlated high-spin 2+, even though magnetic measurements show the Mn sites to be nonmagnetic. This apparently paradoxical result demonstrates that a ligand field can effectively appear between localized Mn 3$d$ and surrounding B 2$p$ orbitals, which has been anticipated as a manifestation of a Kondo effect but not been clearly confirmed for most itinerant metals in spectroscopy. By contrast, the Mn 2$p$ photoemission indicates that the occupied Mn$^{2+}$ 3$d$ electrons still exhibit itinerant and nonlocally screened nature also owing to the Kondo-like correlation with the conductive B 2$p$, and heavier Yb 4$f$ and 5$d$ bands below the Fermi energy. The asymmetry on the particle-hole stimulates a reconsideration of the correlation and screening effects in the core-level spectroscopies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_19078 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Re-examination of electronic structure of dilute Kondo transition-metal ions substituted into a Heavy Fermion compound Takubo, Kou Suzuki, Shintaro Yamamoto, Kohei Yamagami, Kohei Horio, Masafumi Ina, Toshiaki Nitta, Kiyohumi Mizumaki, Masaichiro Ikenaga, Eiji Matsumoto, Yosuke Wadati, Hiroki Nakatsuji, Satoru Strongly Correlated Electrons Correlations between the localized and conductive spins/charges have been the central issue of various fascinating quantum phenomena found on itinerant electron systems. Here, the obvious multiplet structures are presented on the Mn 2$p$ to 3$d$ x-ray absorption for a heavy fermion $α$-(Yb,Lu)(Al$_{1-x}$Mn$_x$)B$_4$, indicating that the unoccupied electronic structure of the Mn site is described as the correlated high-spin 2+, even though magnetic measurements show the Mn sites to be nonmagnetic. This apparently paradoxical result demonstrates that a ligand field can effectively appear between localized Mn 3$d$ and surrounding B 2$p$ orbitals, which has been anticipated as a manifestation of a Kondo effect but not been clearly confirmed for most itinerant metals in spectroscopy. By contrast, the Mn 2$p$ photoemission indicates that the occupied Mn$^{2+}$ 3$d$ electrons still exhibit itinerant and nonlocally screened nature also owing to the Kondo-like correlation with the conductive B 2$p$, and heavier Yb 4$f$ and 5$d$ bands below the Fermi energy. The asymmetry on the particle-hole stimulates a reconsideration of the correlation and screening effects in the core-level spectroscopies. |
| title | Re-examination of electronic structure of dilute Kondo transition-metal ions substituted into a Heavy Fermion compound |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.19078 |