Anomalous Optical Absorption in the Normal State of Overdoped Cuprates Near the Charge-Ordering Instability

Caprara, S.; Castro, C. Di; Fratini, Simone; Grilli, M.

doi:10.1103/physrevlett.88.147001

Cited by 37 publications

(24 citation statements)

References 18 publications

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“…We expect this to affect the spectra at very low energies as discussed in Ref. 102 but not at the scale of Fig. 9.…”

Section: Dynamic Properties Of Inhomogeneous States In Cupratesmentioning

confidence: 83%

“…A remarkable effect of doping is that the MIR band strongly softens and merges with the Drude peak, resulting in a feature that cannot be fitted by a conventional Drude model. A variety of alternative theories [101,102] have been proposed in order to describe this feature. Clearly the identification of this low-energy MIR (LEMIR) band is of paramount importance to understand the physics of these materials.…”

Section: Optical Conductivitymentioning

confidence: 99%

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Dynamic properties of inhomogeneous states in cuprates (Review Article)

Lorenzana¹,

Seibold

2006

Low Temperature Physics

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We review the static and dynamical properties of stripe textures with regard to their relevance in high-T c superconductors. Our investigations are based on the time-dependent Gutzwiller approximation which allows for the computation of random-phase approximation-like (RPA) fluctuations on top of the Gutzwiller approximation (GA). No restrictions are imposed on the charge and spin configurations which makes the method suitable for the calculation of linear excitations around symmetry-broken solutions. Within this approach we calculate the optical conductivity of stripes and compare our results with reflectivity experiments on cuprates. Furtheron we use the spin-rotational invariant extension of the GA + RPA method in order to investigate the characteristics of magnetic excitations in the stripe phase of cuprates. Our results are in very good agreement with neutron scattering and optical experiments on lanthanum cuprate superconductors.

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“…We expect this to affect the spectra at very low energies as discussed in Ref. 102 but not at the scale of Fig. 9.…”

Section: Dynamic Properties Of Inhomogeneous States In Cupratesmentioning

confidence: 83%

Section: Optical Conductivitymentioning

confidence: 99%

Dynamic properties of inhomogeneous states in cuprates (Review Article)

Lorenzana¹,

Seibold

2006

Low Temperature Physics

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“…One may notice that, in spite of a higher T CO and a larger ∆U than for the static order of y = 0.05, the fluctuating CO of y = 0.085 does not affect T c , displaying no apparent competition with superconductivity. On the contrary, collective charge excitations in the proximity of a critical transition may play a role in the pairing mechanism leading to High-T c superconductivity [40]. This would be the case of LSCO and LBSCO with y = 0.085.…”

Section: Discussionmentioning

confidence: 99%

Effects of superconductivity and charge order on the subterahertz reflectivity ofLa1.875Ba0.125−ySryCu
Ortolani¹,
Calvani²,
Lupi³
et al. 2006
Phys. Rev. B
13
0
9
0
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The reflectivity R(ω) of both the ab plane and the c axis of two single crystals of La1.875Ba0.125−y SryCuO4 has been measured down to 5 cm −1 , using coherent synchrotron radiation below 30 cm −1 . For y = 0.085, a Josephson Plasma Resonance is detected at T ≪ Tc = 31 K in the out-of-plane Rc(ω), and a far-infrared peak (FIP) appears in the in-plane optical conductivity σ ab (ω) below 50 K, where non-static CO is reported by X-ray scattering. For y = 0.05 (Tc = 10 K), below the ordering temperature TCO, a FIP is again observed in σ ab (ω). The FIP then appears to be an infrared signature of CO, either static or fluctuating, as reported in previous works on the La-Sr cuprates.

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“…They found that the width of the peak in spectral function A k (ω) scales linearly with ω in both hot and cold spots and σ(ω) is inversely linear in ω up to very high frequencies. Besides these spin fluctuation theories mentioned here, by using a phenomenological form of the charge collective mode(CM) propagator and empirical parameter values Caprara et al showed that charge-ordering instability is responsible for the hump in the optical conductivity of high T C cuprates [12] limited only to the overdoped region. The various above theories are reported in the limited range of hole doping resorting to empirical parameters by fitting INS or angle resolved photoemission spectroscopy(ARPES) measurements.…”

Section: Introductionmentioning

confidence: 99%

Origin of the hump structure in the in-plane optical conductivity of high-TCcuprates based on aSU(2)slave-boson theory

et al. 2004

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An improved version of SU(2) slave-boson approach is applied to study the in-plane optical conductivity of the two dimensional systems of high TC cuprates. We investigate the role of fluctuations of both the phase and amplitude of order parameters on the (Drude) peak-dip-hump structure in the in-plane conductivity as a function of hole doping concentration and temperature. The mid-infrared(MIR) hump in the in-plane optical conductivity is shown to originate from the antiferromagnetic spin fluctuations of short range(the amplitude fluctuations of spin singlet pairing order parameters), which is consistent with our previous U(1) study. However the inclusion of both the phase and amplitude fluctuations is shown to substantially improve the qualitative feature of the optical conductivity by showing substantially reduced Drude peak widths for entire doping range. Both the shift of the hump position to lower frequency and the growth of the hump peak height with increasing hole concentration is shown to be consistent with observations.

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Anomalous Optical Absorption in the Normal State of Overdoped Cuprates Near the Charge-Ordering Instability

Cited by 37 publications

References 18 publications

Dynamic properties of inhomogeneous states in cuprates (Review Article)

Dynamic properties of inhomogeneous states in cuprates (Review Article)

Effects of superconductivity and charge order on the subterahertz reflectivity ofLa1.875Ba0.125−ySryCu
Ortolani¹,
Calvani²,
Lupi³
et al. 2006
Phys. Rev. B
13
0
9
0
View full text Add to dashboard Cite

Origin of the hump structure in the in-plane optical conductivity of high-TCcuprates based on aSU(2)slave-boson theory

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Anomalous Optical Absorption in the Normal State of Overdoped Cuprates Near the Charge-Ordering Instability

Cited by 37 publications

References 18 publications

Dynamic properties of inhomogeneous states in cuprates (Review Article)

Dynamic properties of inhomogeneous states in cuprates (Review Article)

Effects of superconductivity and charge order on the subterahertz reflectivity ofLa1.875Ba0.125−ySryCuOrtolani1, Calvani2, Lupi3 et al. 2006Phys. Rev. B13090View full textAdd to dashboardCite

Origin of the hump structure in the in-plane optical conductivity of high-TCcuprates based on aSU(2)slave-boson theory

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Product

Resources

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Effects of superconductivity and charge order on the subterahertz reflectivity ofLa1.875Ba0.125−ySryCu
Ortolani¹,
Calvani²,
Lupi³
et al. 2006
Phys. Rev. B
13
0
9
0
View full text Add to dashboard Cite