Journal ArticleDOI
Bipolaron picture of spin gap state in double-chain systems
TLDR
In this paper, a slightly doped spin gap state in double-chain system was studied in terms of Abelian bosonization method and it was shown that the spin gap formation in terms with the interchain exchange coupling J ⊥ persists only when the two chains are doped with equal number of carriers.About:
This article is published in Solid State Communications.The article was published on 1995-05-01. It has received 26 citations till now. The article focuses on the topics: Bipolaron & Spin states.read more
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The ground state of the two-leg Hubbard ladder a density-matrix renormalization group study
TL;DR: In this article, the ground state properties of two-leg Hubbard ladders are investigated and the authors present density-matrix renormalization group results for the ground-state properties of these ladders.
Journal ArticleDOI
Generalized two-leg Hubbard ladder at half filling: Phase diagram and quantum criticalities
TL;DR: In this paper, the ground-state phase diagram of the half-filled two-leg Hubbard ladder with intersite Coulomb repulsions and exchange coupling is studied by using the strong-coupling perturbation theory and the weak-couppling bosonization method.
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Impurity Induced Antiferromagnetism in Spin-1/2 Heisenberg Two-Leg Ladder Systems
TL;DR: Based on the phase Hamiltonian representation of a spin-1/2 Heisenberg two-leg ladder system coupled antiferromagnetically, which has a spin gap if clean, it is shown that a non-magnetic impurity replacing a spin induces a staggered spin modulation.
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Two interacting helical edge modes in quantum spin Hall systems.
Yukio Tanaka,Naoto Nagaosa +1 more
TL;DR: A new type of interedge correlated liquid without a spin gap is found when the intraedge repulsion is stronger than the Interedge repulsion, showing a diverging density wave and superconductivity correlations much stronger than those of the spinfull electrons.
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Chiral Anomaly and Spin Gap in One-Dimensional Interacting Fermions
Naoto Nagaosa,Masaki Oshikawa +1 more
TL;DR: In this article, a semisclassical approach has been developed for the one-dimensional interacting fermion systems, starting from the incommensurate spin density wave (SDW) mean field state for the repulsive Hubbard model in 1D, the non-Abelian bosonized Lagrangian describing the spin-charge separation is obtained.
References
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The resonating valence bond state in La2CuO4 and superconductivity
TL;DR: The oxide superconductors, particularly those recently discovered that are based on La2CuO4, have a set of peculiarities that suggest a common, unique mechanism: they tend in every case to occur near a metal-insulator transition into an odd-electron insulator with peculiar magnetic properties.
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Nonlinear Field Theory of Large-Spin Heisenberg Antiferromagnets: Semiclassically Quantized Solitons of the One-Dimensional Easy-Axis Néel State
TL;DR: In this article, the O(3) nonlinear sigma model of the large-spin one-dimensional Heisenberg antiferromagnet was shown to be the optimal model for weak easy-axis anisotropy.
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Superconductivity, Spin Gaps and Luttinger Liquids in a Class of Cuprates
TL;DR: A homologous series of cuprates, Srn -1 Cun + 1 O2n, formed by introducing a parallel array of planar defects into the infinite-layer cuprate, SrCuO2, have been reported by Takano et al. as discussed by the authors.
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Correlations in a Two-Chain Hubbard Model
TL;DR: Equal time spin--spin and pair field correlation functions are calculated for a two-chain Hubbard model using a density-matrix numerical renormalization group approach and the pair field correlations appear to follow a power law decay which is similar to their non-interacting U=0 behavior.
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Role of transverse hopping in a two-coupled-chains model.
TL;DR: It is shown that, independent of the presence of spin, [ital t][sub [perpendicular]] strongly modifies the asymptotic long-wavelength behavior of the two chains, opening gaps in the excitation spectra.