{"paper":{"title":"Evidence for suppressed metallicity on the surface of La2-xSrxCuO4 and Nd2-xCexCuO4","license":"","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. Chainani, D. Miwa, E. Ikenaga, F. Nakamura, J. Hori, K. Hirata, K. Horiba, K. Ishii, K. Kobayashi, K. Tamasaku, K. Yamamoto, M. Matsunami, M. Taguchi, M. Yabashi, S. Shin, T. Ishikawa, T. Mochiku, T. Suzuki, T. Takeuchi, T. Yokoya, Y. Nishino, Y. Takata","submitted_at":"2005-01-26T05:40:58Z","abstract_excerpt":"Hard X-ray Photoemission spectroscopy (PES) of copper core electronic states, with a probing depth of $\\sim$60 \\AA, is used to show that the Zhang-Rice singlet feature is present in La$_2$CuO$_4$ but is absent in Nd$_2$CuO$_4$. Hole- and electron doping in La$_{2-x}$Sr$_x$CuO$_4$ (LSCO) and Nd$_{2-x}$Ce$_x$CuO$_4$ (NCCO) result in new well-screened features which are missing in soft X-ray PES. Impurity Anderson model calculations establish metallic screening as its origin, which is strongly suppressed within 15 $\\text{\\AA}$ of the surface. Complemented with X-ray absorption spectroscopy, the s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0501621","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}