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Fermi surface in La-based cuprate superconductors from Compton scattering imaging
| Title: | Fermi surface in La-based cuprate superconductors from Compton scattering imaging |
| Authors: | Yamase, Hiroyuki Browse this author | | Sakurai, Yoshiharu Browse this author | | Fujita, Masaki Browse this author | | Wakimoto, Shuichi Browse this author | | Yamada, Kazuyoshi Browse this author |
| Issue Date: | 13-Apr-2021 |
| Publisher: | Nature Research |
| Journal Title: | Nature communications |
| Volume: | 12 |
| Issue: | 1 |
| Start Page: | 2223 |
| Publisher DOI: | 10.1038/s41467-021-22229-6 |
| Abstract: | Compton scattering provides invaluable information on the underlying Fermi surface (FS) and is a powerful tool complementary to angle-resolved photoemission spectroscopy and quantum oscillation measurements. Here we perform high-resolution Compton scattering measurements for La2-xSrxCuO4 with x=0.08 (T-c=20 K) at 300 K and 150 K, and image the momentum distribution function in the two-dimensional Brillouin zone. We find that the observed images cannot be reconciled with the conventional hole-like FS believed so far. Instead, our data imply that the FS is strongly deformed by the underlying nematicity in each CuO2 plane, but the bulk FSs recover the fourfold symmetry. We also find an unusually strong temperature dependence of the momentum distribution function, which may originate from the pseudogap formation in the presence of the reconstructed FSs due to the underlying nematicity. Additional measurements for x=0.15 and 0.30 at 300 K suggest similar FS deformation with weaker nematicity, which nearly vanishes at x=0.30. Compton scattering provides information on the Fermi surface (FS) hence very useful to understand the electronic structure of high temperature superconductors. Here, Yamase et al. perform Compton scattering measurements on La2-xSrxCuO4 samples and observe deformed FS in CuO2 plane due to nematicity but recovering fourfold symmetry in bulk FS. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/81979 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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