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| Main Authors: | , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.14310 |
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| _version_ | 1866917885868244992 |
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| author | Pattanayak, Aswini K. Rout, Jagi Jha, Pankaj K. |
| author_facet | Pattanayak, Aswini K. Rout, Jagi Jha, Pankaj K. |
| contents | Iron chalcogenides superconductors, such as Fe(Te,Se) have recently garnered significant attention due to their simple crystal structure with a relatively easy synthesis process, high-temperature superconductivity, intrinsic topological band structure, and an unconventional pairing of superconductivity with ferromagnetism. Here, we report the complex in-plane refractive index measurement of nanometer-thin Fe(Te,Se) flake exfoliated from a single crystal FeTe$_{\text{0.6}}$Se$_{\text{0.4}}$ for photon wavelengths from 450 to 1100 nm over a temperature range from 4 K to 295 K. The results were obtained by employing a two-Drude model for the dielectric function of Fe(Te,Se), a multiband superconductor, and fitting the absolute optical reflection spectra using the transfer matrix method. A high extinction coefficient in the visible to near-infrared range makes nanometer-thin Fe(Te,Se) flakes a promising material for photodetection applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_14310 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Temperature-Dependent Optical Constants of Nanometer-thin Flakes of Fe(Te,Se) Superconductor in the Visible and Near-Infrared Regime Pattanayak, Aswini K. Rout, Jagi Jha, Pankaj K. Superconductivity Materials Science Quantum Physics Iron chalcogenides superconductors, such as Fe(Te,Se) have recently garnered significant attention due to their simple crystal structure with a relatively easy synthesis process, high-temperature superconductivity, intrinsic topological band structure, and an unconventional pairing of superconductivity with ferromagnetism. Here, we report the complex in-plane refractive index measurement of nanometer-thin Fe(Te,Se) flake exfoliated from a single crystal FeTe$_{\text{0.6}}$Se$_{\text{0.4}}$ for photon wavelengths from 450 to 1100 nm over a temperature range from 4 K to 295 K. The results were obtained by employing a two-Drude model for the dielectric function of Fe(Te,Se), a multiband superconductor, and fitting the absolute optical reflection spectra using the transfer matrix method. A high extinction coefficient in the visible to near-infrared range makes nanometer-thin Fe(Te,Se) flakes a promising material for photodetection applications. |
| title | Temperature-Dependent Optical Constants of Nanometer-thin Flakes of Fe(Te,Se) Superconductor in the Visible and Near-Infrared Regime |
| topic | Superconductivity Materials Science Quantum Physics |
| url | https://arxiv.org/abs/2407.14310 |