Related papers: Toroid Current States in Doped Antiferromagnetic I…
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This paper has been withdrawn by the authors, since we have come to believe that the present approach is not convergent at small doping. We will shortly submit an improved theory of the tJJ' model at small J/t in the dilute hole limit. This…
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This paper has been withdrawn due to upload of another version of it as a new preprint: gr-qc/0404097
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We show that a static electric field induces the transition from a ferromagnetic metal to an antiferromagnetic insulator owing to the Bloch oscillation of conduction electrons. In the steady state, the electric current is inversely…
When a ferromagnet is deposited on the surface of a topological insulator the topologically protected surface state develops a gap and becomes a 2-dimensional quantum Hall liquid. We demonstrate that the Hall current in such a liquid,…
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This paper has been withdrawn because the first author submitted the paper without previously consulting the rest of the authors.
The ground states and excitations of two-dimensional insulating and doped Mott insulators are described by a bond operator formalism. While the method represents the degrees of freedom of an arbitrary antiferromagnet exactly, it is…
This paper has been withdrawn due to submission of subsequent versions as a new preprint
This paper has been withdrawn by the author(s), due a crucial error in the data.