講演情報
[17p-WL2_101-2]Observation and theoretical explanation of coherent transport in strongly correlated perovskite-manganite quantum wells
〇(D)Tatsuro Endo1, Yasufumi Araki2, Munetoshi Seki1,3, Hitoshi Tabata1,3, Masaaki Tanaka1,3,4, Shinobu Ohya1,3,4 (1.Univ. Tokyo, 2.JAEA, 3.CSRN, Univ. Tokyo, 4.NanoQuine)
キーワード：
Quantum Well、Strongly-correlated electron system、LSMO
The strong electron-electron correlations in transition-metal oxides (TMOs) give rise to a variety of emergent physics. Nevertheless, the direct experimental demonstration of coherent transport in TMO thin layers — such as the observation of quantum-well (QW) states — has so far been limited to TMOs with moderate or weak electron correlations. The observation of electron coherence is lacking in the perovskite manganite La1–xSrxMnO3 (LSMO), despite its significant interest in the field of spintronics due to its rich magnetic properties.
Here, we report the observation of QW states by tunneling spectroscopy in thin metallic LSMO layers. In this work, oscillatory conduction is observed in tunnel diodes containing a thin LSMO layer. The oscillations originate from discrete QW states formed by quantum confinement in the LSMO layer. These QW states are quantitatively explained using a tight-binding model tailored to the electronic structure of thin LSMO layers.
Here, we report the observation of QW states by tunneling spectroscopy in thin metallic LSMO layers. In this work, oscillatory conduction is observed in tunnel diodes containing a thin LSMO layer. The oscillations originate from discrete QW states formed by quantum confinement in the LSMO layer. These QW states are quantitatively explained using a tight-binding model tailored to the electronic structure of thin LSMO layers.