Topological aspects of the stripe structure in manganese oxides are discussed in terms of the &qu... more Topological aspects of the stripe structure in manganese oxides are discussed in terms of the "winding number" w associated with the Berry-phase conncection for e g orbitals acquired by the parallel transport through the periodic array of Jahn-Teller centers. For La 1-x Ca x MnO 3, w is shown to characterize both the three-dimensional spin-charge-orbital structures in the antiferromagnetic phase for x≥1/2 and the charge-orbital stripes in the two-dimensional ferromagnetic phase for <1/2.
In order to gain an insight into the formation of paired Jahn–Teller (JT) stripes, we have invest... more In order to gain an insight into the formation of paired Jahn–Teller (JT) stripes, we have investigated the electronic and vibronic structures in the manganese oxides by paying due attention to the effect of the Berry phase associated with the JT distortions on the band motion of an eg electron. In terms of a band-insulator picture, we have succeeded in obtaining the JT stripes and the stabilization mechanism of the CE-type antiferromagnetism in agreement with experiment.
Topological aspects of the stripe structure in manganese oxides are discussed in terms of the &qu... more Topological aspects of the stripe structure in manganese oxides are discussed in terms of the "winding number" w associated with the Berry-phase conncection for e g orbitals acquired by the parallel transport through the periodic array of Jahn-Teller centers. For La 1-x Ca x MnO 3, w is shown to characterize both the three-dimensional spin-charge-orbital structures in the antiferromagnetic phase for x≥1/2 and the charge-orbital stripes in the two-dimensional ferromagnetic phase for <1/2.
In order to gain an insight into the formation of paired Jahn–Teller (JT) stripes, we have invest... more In order to gain an insight into the formation of paired Jahn–Teller (JT) stripes, we have investigated the electronic and vibronic structures in the manganese oxides by paying due attention to the effect of the Berry phase associated with the JT distortions on the band motion of an eg electron. In terms of a band-insulator picture, we have succeeded in obtaining the JT stripes and the stabilization mechanism of the CE-type antiferromagnetism in agreement with experiment.
Uploads
Papers by Yasutami Takada