Mean Field Theory of RVB and Superconductivity

Suzumura, Yoshikazu; Hasegawa, Yūko; Fukuyama, Hidetoshi

doi:10.1143/jpsj.57.2768

Cited by 239 publications

(161 citation statements)

References 31 publications

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“…12 It is generally agreed that the electronic states of the overdoped HTSC copper oxides are understood with the Fermi liquid theory, where the electron correlation is effectively weakened by a large amount of carriers. [24][25][26] Owing to the high Cu valence of 2.4, the title compound can be compared with the overdoped HTSC copper oxides.…”

Section: -2mentioning

confidence: 99%

An origin of good electrical conduction in La4BaCu5O13+δ

Mori

Asai

Terasaki

et al. 2015

Journal of Applied Physics

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We have prepared a set of polycrystalline samples of the metallic copper oxide La 4 BaCu 5Àx Co x O 13þd (0 x 0.35) and have measured the resistivity from 4 to 800 K. All the resistivities show metallic temperature dependence with a small magnitude less than 2 mX cm at 800 K, indicating that the metallic conduction is robust against impurities. The robust metallic conduction further suggests that this class of oxide is a promising candidate for electrical leads at high temperature, which might replace platinum. A detailed measurement and analysis on the Hall resistivity have revealed that at least two components are responsible for the electrical conduction, in which a large number of electrons of moderate mobility coexist with a much smaller number of holes of extremely high mobility. This large electron density well screens the impurity potential and retains the metallic conduction against 7% impurity doping. V C 2015 AIP Publishing LLC.

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Section: -2mentioning

confidence: 99%

An origin of good electrical conduction in La4BaCu5O13+δ

Mori

Asai

Terasaki

et al. 2015

Journal of Applied Physics

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“…In this work we will pursue an approach based on the t-J model [4,5] analysed by the slave-boson decomposition [6,7,8,9]. In the mean-field approximation, this approach has been studied intensively [10,11,12,13,14,15,16,17] with a view to describing the magnetic properties of the high-T c materials.…”

Section: Introductionmentioning

confidence: 99%

Dynamic susceptibility and photoemission in thet-t’-Jmodel

Normand

Lee

1995

Phys. Rev. B

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We consider a bilayer version of the extended t-J model, with a view to computing the form of certain experimentally observable properties. Using the slave-boson decomposition, we show at the mean-field level that in the bilayer system the existence of in-plane d-wave singlet pairing excludes any interplane singlet order for reasonable values of the interplane superexchange parameter. Restricting the analysis to the regime of no interplane singlet pairing, we deduce parameter sets reproducing the Fermi surfaces of YBCO-and BSCCO-like bilayer systems. From these we calculate the form of the dynamic susceptibility χ(q, ω) in both systems, and of the anomalies in frequency and linewidth of selected phonon modes in YBCO. We compare the results with experiment, and discuss the features which differ from the single-layer case.

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“…Such coupling is ignored in other proposed theories [14][15][16][17]. Hubbard-Stratonovich transformations for the hopping, spinon pairing and holon pairing orders leads to the partition function,…”

Section: Theory a U(1) And Su(2) Slave-boson Theories Of T-j Hammentioning

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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Mean Field Theory of RVB and Superconductivity

Cited by 239 publications

References 31 publications

An origin of good electrical conduction in La4BaCu5O13+δ

An origin of good electrical conduction in La4BaCu5O13+δ

Dynamic susceptibility and photoemission in thet-t’-Jmodel

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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