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Dietrich Wulferding
원자제어 저차원 전자계 연구단
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Relation between cuprate superconductivity and magnetism: A Raman study of (CaLa)1(BaLa)2Cu3 Oy

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Title
Relation between cuprate superconductivity and magnetism: A Raman study of (CaLa)1(BaLa)2Cu3 Oy
Author(s)
Dirk Wulferding; Shay M.; Drachuck G.; Ofer R.; Bazalitsky G.; Salman Z.; Lemmens P.; Keren A.
Publication Date
2014-09
Journal
PHYSICAL REVIEW B, v.90, no.10, pp.104511 -
Publisher
AMER PHYSICAL SOC
Abstract
We present an investigation of charge-compensated antiferromagnetic (CaxLa1.x)(Ba1.75.xLa0.25+x)Cu3Oy single crystals using Raman scattering as well as muon spin rotation. In this system the parameter x controls the Cu-O-Cu superexchange interaction via bond distances and buckling angles. The oxygen content y controls the charge doping. In the absence of doping the two-magnon peak position is directly proportional to the superexchange strength J .We find that both x and y affect the peak position considerably. The N´eel temperature determined from muon spin rotation on the same samples independently confirms the strong dependence of the magnetic interaction on x and y. We find a considerable increase in the maximum superconducting transition temperature T max c with J . This is strong evidence of the importance of orbital overlap to superconductivity in this family of cuprates.
URI
http://pr.ibs.re.kr/handle/8788114/1557
DOI
10.1103/PhysRevB.90.104511
ISSN
2469-9950
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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