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Electronic Structure of the Superconducting Layered Non‐Cuprate Sr 2 RuO 4 from 2D‐ACAR Measurements
Author(s) -
Abdul Hamid A.S.,
Tanigawa S.,
Mao Z.Q.,
Maeno Y.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200205)231:1<149::aid-pssb149>3.0.co;2-h
Subject(s) - fermi surface , condensed matter physics , cuprate , physics , superconductivity , fermi level , position and momentum space , electronic structure , spectral line , annihilation , momentum (technical analysis) , electronic band structure , electron , space (punctuation) , quantum mechanics , linguistics , philosophy , finance , economics
The three‐dimensional electron density in momentum space ϱ ( P ) and in wave vector space n ( k ) were constructed for Sr 2 RuO 4 . The measurements were achieved using 512 detectors to yield two dimensional angular correlation of annihilation radiation 2D‐ACAR spectra. ϱ ( P ) Spectra disclosed a d‐like character that was interpreted via the electronic configuration of Ru. From another standpoint, the Fermi surface topology was compared to the theoretical band structure calculation based on the local density approximation (LDA). It clarified that two electron surfaces are running along the Γ–Z direction and one hole surface around the X point. It was noteworthy that, while Sr 2 RuO 4 has a low critical temperature T c , its Fermi surface is large and complex similar to that of a high‐temperature superconductor (HTS).