Persistent currents in a Möbius ladder: A test of interchain coherence of interacting electrons

Frédéric Mila, C. A. Stafford, and Sylvain Capponi
Phys. Rev. B 57, 1457 – Published 15 January 1998
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Abstract

Persistent currents in a Moebius ladder are shown to be very sensitive to the effects of intrachain interactions on the hopping of electrons between chains. Their periodicity as a function of flux is doubled for strong enough repulsive interactions because electrons cannot hop coherently between the chains and have to travel along the full edge of the Moebius ladder, thus encircling the flux twice. The interplay of topology and interactions is shown to lead to interesting finite-size effects on the odd harmonics of the persistent current.

  • Received 24 July 1997

DOI:https://doi.org/10.1103/PhysRevB.57.1457

©1998 American Physical Society

Authors & Affiliations

Frédéric Mila

  • Laboratoire de Physique Quantique, Université Paul Sabatier, 31062 Toulouse, France

C. A. Stafford*

  • Institut de Physique Théorique, Université de Fribourg, 1700 Fribourg, Switzerland

Sylvain Capponi

  • Laboratoire de Physique Quantique, Université Paul Sabatier, 31062 Toulouse, France

  • *Present address: Fakultät für Physik, Albert-Ludwigs-Universität, D-79104 Freiburg, Germany.

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Vol. 57, Iss. 3 — 15 January 1998

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