Strong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4
The origin of intrinsic quantum criticality in the heavy-fermion superconductor β-YbAlB4 has been attributed to strong Yb valence fluctuations and its peculiar crystal structure. Here, we assess these contributions individually by studying the isostructural but fixed-valence compound β-LuAlB4. Quant...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2020
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| _version_ | 1797106220370231296 |
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| author | Reiss, P Baglo, J En Tan, H Chen, X Friedemann, S Kuga, K Grosche, FM Nakatsuji, S Sutherland, M |
| author_facet | Reiss, P Baglo, J En Tan, H Chen, X Friedemann, S Kuga, K Grosche, FM Nakatsuji, S Sutherland, M |
| author_sort | Reiss, P |
| collection | OXFORD |
| description | The origin of intrinsic quantum criticality in the heavy-fermion superconductor β-YbAlB4 has
been attributed to strong Yb valence fluctuations and its peculiar crystal structure. Here, we
assess these contributions individually by studying the isostructural but fixed-valence compound
β-LuAlB4. Quantum oscillation measurements and DFT calculations reveal a Fermi surface in βLuAlB4 markedly different from that of β-YbAlB4, consistent with a ‘large‘ Fermi surface in the
latter. We also find an unexpected in-plane anisotropy of the electronic structure, in contrast to the
isotropic Kondo hybridization in β-YbAlB4. |
| first_indexed | 2024-03-07T06:58:36Z |
| format | Journal article |
| id | oxford-uuid:fefbfb87-b7e8-486a-9a04-fea02efdcc93 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:58:36Z |
| publishDate | 2020 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:fefbfb87-b7e8-486a-9a04-fea02efdcc932022-03-27T13:41:07ZStrong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fefbfb87-b7e8-486a-9a04-fea02efdcc93EnglishSymplectic ElementsAmerican Physical Society2020Reiss, PBaglo, JEn Tan, HChen, XFriedemann, SKuga, KGrosche, FMNakatsuji, SSutherland, MThe origin of intrinsic quantum criticality in the heavy-fermion superconductor β-YbAlB4 has been attributed to strong Yb valence fluctuations and its peculiar crystal structure. Here, we assess these contributions individually by studying the isostructural but fixed-valence compound β-LuAlB4. Quantum oscillation measurements and DFT calculations reveal a Fermi surface in βLuAlB4 markedly different from that of β-YbAlB4, consistent with a ‘large‘ Fermi surface in the latter. We also find an unexpected in-plane anisotropy of the electronic structure, in contrast to the isotropic Kondo hybridization in β-YbAlB4. |
| spellingShingle | Reiss, P Baglo, J En Tan, H Chen, X Friedemann, S Kuga, K Grosche, FM Nakatsuji, S Sutherland, M Strong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4 |
| title | Strong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4 |
| title_full | Strong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4 |
| title_fullStr | Strong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4 |
| title_full_unstemmed | Strong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4 |
| title_short | Strong in-plane anisotropy in the electronic structure of fixed-valence β − LuAlB 4 |
| title_sort | strong in plane anisotropy in the electronic structure of fixed valence β lualb 4 |
| work_keys_str_mv | AT reissp stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT bagloj stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT entanh stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT chenx stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT friedemanns stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT kugak stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT groschefm stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT nakatsujis stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 AT sutherlandm stronginplaneanisotropyintheelectronicstructureoffixedvalenceblualb4 |