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説明:

Charge excitation spectra are getting clear in cuprate superconductors in momentum-energy space especially around a small momentum region, where plasmon excitations become dominant. Here, we study whether Landau quasiparticles survive in the presence of charge fluctuations observed in experiments. We employ the layered t -J model with the long-range Coulomb interaction, which can reproduce the realistic charge fluctuations. We find that Landau quasiparticles are retained in a realistic temperature and doping region, although the quasiparticle spectral weight is strongly reduced to 0.08–0.24. Counterintuitively, the presence of this small quasiparticle weight does not work favorably to generate a pseudogap.

権利情報:

• In Copyright
  

キーワード: electron self-energy , cuprate superconductors, charge fluctuations , quasiparticle , long-range Coulomb interaction

刊行年月日: 2024-03-20

出版者: American Physical Society (APS)

掲載誌:

• Physical Review B (ISSN: 24699950) vol. 109 issue. 10 104515

研究助成金:

• Japan Society for the Promotion of Science JP20H01856
• Ministry of Education, Culture, Sports, Science and Technology

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4995

公開URL: https://doi.org/10.1103/physrevb.109.104515

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更新時刻: 2024-11-19 16:31:21 +0900

MDRでの公開時刻: 2024-11-19 16:31:21 +0900