by Tjernberg, O, Tjeng, LH, Steeneken, PG, Ghiringhelli, G and Nugroho, AA, Menovsky, AA and Brookes, NB
Abstract:
The spin nature of the states at the top of the valence band in Nd2CuO4 and Nd1.85Ce0.15CuO4-delta has been investigated with spin polarized resonant photoemission. A clear Zhang-Rice singlet state is observed at the top of the valence band in the undoped compound showing that the parent compound of this electron doped superconductor is similar to the parent compounds of hole doped cuprate superconductors. Upon doping, the stability of the singlet is destroyed and the optimum doped compound Nd1.85Ce0.15CuO4-delta does not display any well-separated singlet state. These results indicate that hole contribution to the superconductivity in this system is not important in contrast to what has previously been suggested on the bases of transport measurements.
Reference:
Electrons, holes, and spin in Nd2-xCexCuO4-delta (Tjernberg, O, Tjeng, LH, Steeneken, PG, Ghiringhelli, G and Nugroho, AA, Menovsky, AA and Brookes, NB), In PHYSICAL REVIEW B, AMER PHYSICAL SOC, volume 67, 2003.
Bibtex Entry:
@article{ ISI:000182033700016, Author = {Tjernberg, O and Tjeng, LH and Steeneken, PG and Ghiringhelli, G and Nugroho, AA and Menovsky, AA and Brookes, NB}, Title = {{Electrons, holes, and spin in Nd2-xCexCuO4-delta}}, Journal = {{PHYSICAL REVIEW B}}, Year = {{2003}}, Volume = {{67}}, Number = {{10}}, Month = {{MAR 1}}, Abstract = {{The spin nature of the states at the top of the valence band in Nd2CuO4 and Nd1.85Ce0.15CuO4-delta has been investigated with spin polarized resonant photoemission. A clear Zhang-Rice singlet state is observed at the top of the valence band in the undoped compound showing that the parent compound of this electron doped superconductor is similar to the parent compounds of hole doped cuprate superconductors. Upon doping, the stability of the singlet is destroyed and the optimum doped compound Nd1.85Ce0.15CuO4-delta does not display any well-separated singlet state. These results indicate that hole contribution to the superconductivity in this system is not important in contrast to what has previously been suggested on the bases of transport measurements.}}, Publisher = {{AMER PHYSICAL SOC}}, Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}}, Type = {{Article}}, Language = {{English}}, Affiliation = {{Tjernberg, O (Corresponding Author), Royal Inst Technol, Lab Mat & Semicond Phys, Electrum 229, S-16440 Kista, Sweden. Royal Inst Technol, Lab Mat & Semicond Phys, S-16440 Kista, Sweden. European Synchrotron Radiat Facil, F-38043 Grenoble, France. Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany. Univ Groningen, Ctr Mat Sci, Solid State Phys Lab, NL-9747 AG Groningen, Netherlands. Politecn Milan, Dipartimento Fis, INFM, I-20133 Milan, Italy. Univ Amsterdam, Van der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands.}}, DOI = {{10.1103/PhysRevB.67.100501}}, Article-Number = {{100501}}, ISSN = {{2469-9950}}, EISSN = {{2469-9969}}, Keywords-Plus = {{TRANSPORT-PROPERTIES; STATE; SUPERCONDUCTIVITY; ND1.85CE0.15CUO4; PHOTOEMISSION}}, Research-Areas = {{Materials Science; Physics}}, Web-of-Science-Categories = {{Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter}}, Author-Email = {{oscar@kth.se}}, ResearcherID-Numbers = {{Steeneken, Peter/F-9744-2010 Brookes, Nicholas B/C-6718-2019 /AAD-2465-2020 Ghiringhelli, Giacomo/D-1159-2014 Tjeng, Liu Hao/B-8607-2019 Nugroho, Agustinus Agung/E-5977-2010}}, ORCID-Numbers = {{Steeneken, Peter/0000-0002-5764-1218 Brookes, Nicholas B/0000-0002-1342-9530 /0000-0002-5764-1218 Ghiringhelli, Giacomo/0000-0003-0867-7748 Tjeng, Liu Hao/0000-0002-0595-9312 Nugroho, Agustinus Agung/0000-0002-1785-4008}}, Number-of-Cited-References = {{27}}, Times-Cited = {{7}}, Usage-Count-Last-180-days = {{0}}, Usage-Count-Since-2013 = {{5}}, Journal-ISO = {{Phys. Rev. B}}, Doc-Delivery-Number = {{663YB}}, Unique-ID = {{ISI:000182033700016}}, DA = {{2020-12-22}}, }
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