Simultaneous probes of pseudogap and disorder by hard x-ray photoemission applied for a candidate thermoelectric Al-Pd-Ru quasicrystal
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| Autores principales: | , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| author | Sakamoto, N. U. Nozue, G. Fujiwara, H. Torii, Y. Sakaguchi, M. Nakamura, T. D. Kiss, T. Sugawara, H. Tanaka, S. Iwasaki, Y. Niwa, Y. Ishikawa, A. Yamamoto, T. D. Tamura, R. Yasui, A. Sekiyama, A. |
| author_facet | Sakamoto, N. U. Nozue, G. Fujiwara, H. Torii, Y. Sakaguchi, M. Nakamura, T. D. Kiss, T. Sugawara, H. Tanaka, S. Iwasaki, Y. Niwa, Y. Ishikawa, A. Yamamoto, T. D. Tamura, R. Yasui, A. Sekiyama, A. |
| contents | The bulk electronic structure of Al-Pd-Ru quasicrystal (QC) have been investigated by hard X-ray photoemission spectroscopy (HAXPES). We have found an intrinsic pseudogap structure in which the spectral weight in the vicinity of the Fermi level (E_F) is remarkably suppressed at any photon energy. The valence-band HAXPES spectra and the asymmetry of the core-level peaks indicate a contribution of the Al sites to the electronic structure in the vicinity of E_F with less contributions from the Pd and Ru sites. The disorder effects are found in the core-level lineshapes of the Al-Pd-Ru QC, of which the widths are much broader than those of the other reference crystalline solids with less disorder. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_11156 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Simultaneous probes of pseudogap and disorder by hard x-ray photoemission applied for a candidate thermoelectric Al-Pd-Ru quasicrystal Sakamoto, N. U. Nozue, G. Fujiwara, H. Torii, Y. Sakaguchi, M. Nakamura, T. D. Kiss, T. Sugawara, H. Tanaka, S. Iwasaki, Y. Niwa, Y. Ishikawa, A. Yamamoto, T. D. Tamura, R. Yasui, A. Sekiyama, A. Materials Science Disordered Systems and Neural Networks Other Condensed Matter Strongly Correlated Electrons The bulk electronic structure of Al-Pd-Ru quasicrystal (QC) have been investigated by hard X-ray photoemission spectroscopy (HAXPES). We have found an intrinsic pseudogap structure in which the spectral weight in the vicinity of the Fermi level (E_F) is remarkably suppressed at any photon energy. The valence-band HAXPES spectra and the asymmetry of the core-level peaks indicate a contribution of the Al sites to the electronic structure in the vicinity of E_F with less contributions from the Pd and Ru sites. The disorder effects are found in the core-level lineshapes of the Al-Pd-Ru QC, of which the widths are much broader than those of the other reference crystalline solids with less disorder. |
| title | Simultaneous probes of pseudogap and disorder by hard x-ray photoemission applied for a candidate thermoelectric Al-Pd-Ru quasicrystal |
| topic | Materials Science Disordered Systems and Neural Networks Other Condensed Matter Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2505.11156 |