講演情報
[14a-K502-2]Dependence of the oscillatory conductivity on the La0.67Sr0.33MnO3 thickness in all-epitaxial La0.67Sr0.33MnO3/ SrTiO3/ Nb:SrTiO3 tunneling heterostructures
〇(D)Tatsuro Endo1, Masaaki Tanaka1,2, Shinobu Ohya1,2 (1.Univ. Tokyo, 2.CSRN, Univ. Tokyo)
キーワード：
quantum confinement、strongly correlated system、perovskite manganite
The report on quantum confinement effect in transition metal oxide have been limited to moderately correlated systems or systems with electrons confined in defects, at interfaces or in δ-doped regions. Here, we report a possible observation of quantum confinement effect in strongly correlated perovskite manganite, La0.67Sr0.33MnO3 (LSMO). This material exhibits various magnetic properties arising from the strong correlation, making it a subject of significant interest for spintronics applications. By measureing the conductivity of the tunnel diode structure with LSMO layer with various thickness and the SrTiO3 barrier layer, we observed a conductivity oscillation and its LSMO layer thickness dependence, suggesting the quantum confinement of holes in the LSMO layer.