Visible-NIR-Frequency Hyperbolic Response in Nodal-Line Semimetal PbTaSe$_2$
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arXiv
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| Format: | Preprint |
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2026
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| author | Santamaria-Garcia, Vivian J. Blevins, Morgan G. Pajovic, Simo Orona-Navar, Carolina Boriskina, Svetlana V. |
| author_facet | Santamaria-Garcia, Vivian J. Blevins, Morgan G. Pajovic, Simo Orona-Navar, Carolina Boriskina, Svetlana V. |
| contents | Natural hyperbolic materials offer a powerful platform for light-matter interactions by supporting highly anisotropic electromagnetic modes without the need for artificial patterning. In this work, we experimentally demonstrate that the nodal-line semimetal PbTaSe$_2$ exhibits robust hyperbolic optical behavior in the visible to near-infrared spectral range, which arises intrinsically from its anisotropic electronic structure and layered crystal symmetry. By combining first-principles calculations, ellipsometry, Drude-Lorentz modeling, and reflectance measurements, we establish a consistent experimental and theoretical picture of bulk hyperbolicity in this material. This hyperbolicity is of plasmonic origin and is characterized by a competitive quality factor ($Q_\mathrm{max} \approx 2.8$) and a very large anisotropy parameter ($|R| \approx 231$) at 0.78 eV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_12611 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Visible-NIR-Frequency Hyperbolic Response in Nodal-Line Semimetal PbTaSe$_2$ Santamaria-Garcia, Vivian J. Blevins, Morgan G. Pajovic, Simo Orona-Navar, Carolina Boriskina, Svetlana V. Optics Materials Science Natural hyperbolic materials offer a powerful platform for light-matter interactions by supporting highly anisotropic electromagnetic modes without the need for artificial patterning. In this work, we experimentally demonstrate that the nodal-line semimetal PbTaSe$_2$ exhibits robust hyperbolic optical behavior in the visible to near-infrared spectral range, which arises intrinsically from its anisotropic electronic structure and layered crystal symmetry. By combining first-principles calculations, ellipsometry, Drude-Lorentz modeling, and reflectance measurements, we establish a consistent experimental and theoretical picture of bulk hyperbolicity in this material. This hyperbolicity is of plasmonic origin and is characterized by a competitive quality factor ($Q_\mathrm{max} \approx 2.8$) and a very large anisotropy parameter ($|R| \approx 231$) at 0.78 eV. |
| title | Visible-NIR-Frequency Hyperbolic Response in Nodal-Line Semimetal PbTaSe$_2$ |
| topic | Optics Materials Science |
| url | https://arxiv.org/abs/2605.12611 |