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An SO(5) model of p-wave superconductivity and ferromagnetism
Shuichi Murakami, Naoto Nagaosa, Manfred Sigrist
We study an SO(5) model unifying p-wave superconductivity and ferromagnetism. If only a single p-wave pairing wavefunction is involved, the p-wave superconducting (pSC) and ferroma…
Fractional charge in transport through a 1D correlated insulator of finite length
Vadim Ponomarenko, Naoto Nagaosa
Transport through a one channel wire of length confined between two leads is examined when the 1D electron system has an energy gap : induced by the…
Phase Diagram in Manganese Oxides
Ryo Maezono, Sumio Ishihara, Naoto Nagaosa
We study theoretically the phase diagram of perovskite manganites taking into account the double degeneracy of the orbitals in a ion. A rich phase diagram is obtain…
Lattice Instability in the Spin-Ladder System under Magnetic Field
Naoto Nagaosa, Shuichi Murakami
We study theoretically the lattice instability in the spin gap systems under magnetic field. With the magnetic field larger than a critical value h_{c1}, the spin gap is collapsed…