Charge-density wave formation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>14</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mm

Gorshunov, B.; Haas, P.; Rõõm, T.; Dressel, Martin; Vuletić, Tomislav; Korin-Hamzić, Bojana; Tomić, Silvia; Akimitsu, Jun; Nagata, Takashi

doi:10.1103/physrevb.66.060508

Cited by 49 publications

(49 citation statements)

References 31 publications

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“…In addition to the superconducting state, intensive studies have been devoted to the charge-density-wave (CDW) state, which is found in the parent system (x = 0) from optical measurements. 13,14,15 Further the global phase diagram for overall hole doping 16,17 shows that, with increasing the hole doping, the CDW state is suppressed and disappears at x ≃ 9, while the superconducting state emerges for x ≃ 11 and under pressure. From Raman scattering measurements, 18 it has been suggested that collective modes of the CDW state exist even in the highly doped superconducting material x = 12.…”

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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“…In transitionmetal oxides, CO is a common phenomenon and an increasing number of dielectric measurements close to charge-ordering transitions are reported, specifically in lowdimensional systems having in mind the close analogy to the Peierls transition in metallic systems. Indeed, as mentioned above, a giant dielectric response has been detected in the insulating two-leg ladder Sr 14 Cu 24 O 41 [15,16] and in onedimensional (DI-DCNQ) 2 Ag [17]. Thus it seems promising to investigate also the insulating charge-ordered tetraselenide (NbSe 4 ) 3 I by broadband dielectric spectroscopy.…”

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confidence: 99%

Giant Dielectric Response in the One-Dimensional Charge-Ordered Semiconductor(NbSe4)3I

et al. 2006

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We report on broadband dielectric spectroscopy on the one-dimensional semiconductor (NbSe 4 ) 3 I. Below the structural phase transition close to 270 K we observe colossal dielectric constants with a frequency and temperature dependence very similar to what is observed in canonical charge-density wave systems. Guided by structural details we interpret this structural phase transition as driven by complex charge-order processes.

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“…It is possible that this mechanism is responsible for charge ordering in the telephone number compound observed in Ref. 7,6,9. As far as the CDW phases are concerned, the 2k F oscillations are always more relevant.…”

Section: Strong Coupling Phases and Order Parametersmentioning

confidence: 93%

Excitation spectrum of doped two-leg ladders: A field theory analysis

Controzzi

Tsvelik

2005

Phys. Rev. B

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We apply quantum field theory to study the excitation spectrum of doped two-leg ladders. It follows from our analysis that throughout most of the phase diagram the spectrum consists of degenerate quartets of kinks and anti-kinks and a multiplet of vector particles split according to the symmetry of the problem as 3 + 2 +1. This basic picture experiences corrections when one moves through the phase diagram. In some regions the splitting may become very small and in others it is so large that some multiplets are pushed in the continuum and become unstable. At second order transition lines masses of certain particles vanish. Very close to the first order transition line additional generations of particles emerge. Strong interactions in some sectors may generate additional bound states (like breathers) in the asymmetric charge sector. We briefly describe the properties of various correlation functions in different phases.

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Charge-density wave formation inSr14−xCaxCu

Cited by 49 publications

References 31 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

Giant Dielectric Response in the One-Dimensional Charge-Ordered Semiconductor(NbSe4)3I

Excitation spectrum of doped two-leg ladders: A field theory analysis

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