Topological Scenario for Stripe Formation in Manganese Oxides

Abstract

The spin-charge-orbital complex structures of manganites are studied using topological concepts. The key quantity is the "winding number" w associated with the Berry-phase connection of an e_g electron parallel-transported through Jahn-Teller centers, along zigzag one-dimensional paths in an antiferromagnetic environment of t_{2g} spins. From these concepts, it is shown that the "bi-stripe" and "Wigner-crystal" states observed experimentally have different w's. Predictions for the spin structure of the charge-ordered states for heavily doped manganites are discussed.

5 pages, Revtex, with 3 figures embedded in the text. Submitted to Phys. Rev. Lett

References in corpus (2)

• Origin of the Charge-Orbital Stripe Structure in La_(1-x)Ca_(x)MnO_(3) (x=1/2, 2/3)
• Stripe Structures and the Berry-Phase Connection: Concept of Geometric Energy

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