Momentum-dependent charge-density-wave gap formation in ZrTe_{2.98}Se_{0.02}
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913029413666816 |
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| author | Ishiguro, Iori Kunitsu, Hayate Mitsuishi, Natsuki Tsuda, Shunsuke Yaji, Koichiro Yamakawa, Yoichi Kontani, Hiroshi Shimojima, Takahiro |
| author_facet | Ishiguro, Iori Kunitsu, Hayate Mitsuishi, Natsuki Tsuda, Shunsuke Yaji, Koichiro Yamakawa, Yoichi Kontani, Hiroshi Shimojima, Takahiro |
| contents | We investigated the energy gap formation across the charge density wave (CDW) transition inof ZrTe_{2.98}Se_{0.02}. By employing a laser photoemission microscopy, we clearly resolved one elliptical Fermi surface (FS) around the Brillouin zone (BZ) center, and two quasi-one-dimensional FSs along the BZ boundary. We further mapped the intensity difference between the FSs below and above the CDW transition temperature. We found that the energy CDW gap formation is limited to the momentum region 0.25 Å^{-1} < ky < 0.8 Å^{-1} along \bar{B}-\bar{D} line, which coincides with the location of one of the quasi-one-dimensional FSs. Characteristic momentum dependence in the energy CDW gap suggests the importance of both FS nesting and band-dependent electron-phonon coupling for understanding the CDW state in ZrTe_{3} system. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_12326 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Momentum-dependent charge-density-wave gap formation in ZrTe_{2.98}Se_{0.02} Ishiguro, Iori Kunitsu, Hayate Mitsuishi, Natsuki Tsuda, Shunsuke Yaji, Koichiro Yamakawa, Yoichi Kontani, Hiroshi Shimojima, Takahiro Other Condensed Matter We investigated the energy gap formation across the charge density wave (CDW) transition inof ZrTe_{2.98}Se_{0.02}. By employing a laser photoemission microscopy, we clearly resolved one elliptical Fermi surface (FS) around the Brillouin zone (BZ) center, and two quasi-one-dimensional FSs along the BZ boundary. We further mapped the intensity difference between the FSs below and above the CDW transition temperature. We found that the energy CDW gap formation is limited to the momentum region 0.25 Å^{-1} < ky < 0.8 Å^{-1} along \bar{B}-\bar{D} line, which coincides with the location of one of the quasi-one-dimensional FSs. Characteristic momentum dependence in the energy CDW gap suggests the importance of both FS nesting and band-dependent electron-phonon coupling for understanding the CDW state in ZrTe_{3} system. |
| title | Momentum-dependent charge-density-wave gap formation in ZrTe_{2.98}Se_{0.02} |
| topic | Other Condensed Matter |
| url | https://arxiv.org/abs/2604.12326 |