2020/12/07 by Takanori Taniguchi, Kota Kudo, Taniguchi, Takanori +11
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2012.03529
openalex publication_date 2020/12/07 · openalex created_date 2020/12/21 · openalex updated_date 2026/07/28
Despite its unique structural features, the magnetism of single-layered cuprate with five oxygen coordination (T*-type structure) has not been investigated thus far. Here, we report the results of muon spin relaxation and magnetic susceptibility measurements to elucidate the magnetism of T*-type La1-x/2Eu1-x/2SrxCuO4 (LESCO) via magnetic Fe- and non-magnetic Zn-substitution. We clarified the inducement of the spin-glass (SG)-like magnetically ordered state in La1-x/2Eu1-x/2SrxCuyFe1-yO4 with x = 0.24 + y, and the non-magnetic state in La1-x/2Eu1-x/2SrxCuyZn1-yO4 with x = 0.24 after the suppression of superconductivity for y ≥ 0.025. The SG state lies below ∼7 K in a wide Sr concentration range between 0.19 and 0.34 in 5% Fe-substituted LESCO. The short-range SG state is consistent with that originating from the Ruderman-Kittel-Kasuya-Yosida interaction in a metallic state. Thus, the results provide the first evidence for Fermi liquid (FL) state in the pristine T*-type LESCO. Taking into account the results of an oxygen K-edge X-ray absorption spectroscopy measurement [J. Phys. Soc. Jpn. 89, 075002 (2020)] reporting the actual hole concentrations in LESCO, our results demonstrate the existence of the FL state in a lower hole-concentration region, compared to that in T-type La2-xSrxCuO4. The emergence of the FL state in a lower hole-concentration region is possibly associated with a smaller charge transfer gap energy in the parent material with five oxygen coordination.