Superconductivity in ladders and coupled planes

Dagotto, Elbio; Riera, J.; Scalapino, D. J.

doi:10.1103/physrevb.45.5744

Cited by 775 publications

(710 citation statements)

References 14 publications

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“…It has been established that the d-wave-like superconducting (SCd) state becomes the most dominant fluctuation in the ground state of the doped two-leg Hubbard ladder and t-J ladder systems. 19,20,21,22,23,24,25,26,27,28,29,30 When the model is extended to include parameters of several intersite Coulomb repulsions, other fluctuations can overcome the SCd state. A global phase diagram obtained from a weak-coupling g-ology approach shows that the CDW state, s-wave-singlet state, and d-density-wave states can also become quasi-long-rangeordered states in parameter space.…”

Section: Introductionmentioning

confidence: 99%

Magnetic response and quantum critical behavior in the doped two-leg extended Hubbard ladder

Tsuchiizu

Suzumura

2005

Phys. Rev. B

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We have investigated quantum critical behavior in the doped two-leg extended Hubbard ladder, by using a weak-coupling bosonization method. In the ground state, the dominant fluctuation changes from the conventional d-wave-like superconducting (SCd) state into density-wave states, with increasing nearest-neighbor repulsions and/or decreasing doping rate. The competition between the SCd state and the charge-density-wave state coexisting with the p-density-wave state becomes noticeable on the critical point, at which the gap for magnetic excitations vanishes. Based on the Majorana-fermion description of the effective theory, we calculate the temperature dependence of the magnetic response such as the spin susceptibility and the NMR relaxation rate, which exhibit unusual properties due to two kinds of spin excitation modes. On the quantum critical point, the spin susceptibility shows paramagnetic behavior with logarithmic corrections and the NMR relaxation rate also exhibits anomalous power-law behavior. We discuss the commensurability effect due to the umklapp scattering and relevance to the two-leg ladder compounds Sr14−xCaxCu24O41.

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Section: Introductionmentioning

confidence: 99%

Magnetic response and quantum critical behavior in the doped two-leg extended Hubbard ladder

Tsuchiizu

Suzumura

2005

Phys. Rev. B

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“…[1][2][3][4] Uehara et al actually observed the superconductivity in the hole-doped two-leg spin ladder Sr0.4Ca13.6Cu24O41.84 at 3.5 GPa. 5) In the S = 1/2 spin-ladder system with the antiferromagnetic Heisenberg (AFH) exchange interaction, it was theoretically predicted that the magnetic properties of the even-leg spin ladder and odd-leg spin ladder are essentially different; the even-leg spin ladder has a spin gap, while the odd-leg spin ladder is gapless.…”

Section: Introductionmentioning

confidence: 99%

“…5) In the S = 1/2 spin-ladder system with the antiferromagnetic Heisenberg (AFH) exchange interaction, it was theoretically predicted that the magnetic properties of the even-leg spin ladder and odd-leg spin ladder are essentially different; the even-leg spin ladder has a spin gap, while the odd-leg spin ladder is gapless. 6) The magnetic susceptibility of the two-leg spin-ladder compound SrCu2O3, which is the first real spin-ladder material, shows that the spin gap opens at low temperatures. On the other hand, the three-leg spin-ladder compound Sr2CuO5 exhibits the gapless feature as theoretically predicted.…”

Section: Introductionmentioning

confidence: 99%

Magnetization Process of the S = 1/2 Two-Leg Organic Spin-Ladder Compound BIP-BNO

et al. 2017

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We have measured the magnetization of the organic compound BIP-BNO (3,5'-bis(N-tert-butylaminoxyl)-3',5-dibromobiphenyl) up to 76 T where the magnetization is saturated. The S = 1/2 antiferromagnetic Heisenberg two-leg spin-ladder model accounts for the obtained experimental data regarding the magnetization curve, which is clarified using the quantum Monte Carlo method. The exchange constants on the rung and the side rail of the ladder are estimated to be Jrung/kB = 65.7 K and Jleg/kB = 14.1 K, respectively, deeply in the strong coupling region: Jrung/Jleg > 1.

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“…La problématique est quasi-identique 3 dans les "échelles de spins" (chaînes couplées) [8,47,48,72] ou les chaînes de spin-1/2 dimérisées (échanges alternés permanents ou dimérisation en présence d'une transition spin-Peierls). L'application d'un paramètre extérieur (champ magnétique, pression) permet de sonder, dans tous ces systèmes, les phénomènes de transitions de phase quantique (i.e.…”

Section: Introductionunclassified

Diffusion inélastique des neutrons sur les aimants moléculaires

Chaboussant¹

2010

JDN 16 – Diffusion Inélastique Des Neutrons Pour l'Etude Des Excitations Dans La Matiére Condensée

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Superconductivity in ladders and coupled planes

Cited by 775 publications

References 14 publications

Magnetic response and quantum critical behavior in the doped two-leg extended Hubbard ladder

Magnetic response and quantum critical behavior in the doped two-leg extended Hubbard ladder

Magnetization Process of the S = 1/2 Two-Leg Organic Spin-Ladder Compound BIP-BNO

Diffusion inélastique des neutrons sur les aimants moléculaires

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