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Warren, W. W.; Walstedt, R. E.; Brennert, G. F.; Cava, R. J.; Tycko, Robert; Bell, R. F.; Dabbagh, G.

doi:10.1103/physrevlett.62.1193

Cited by 454 publications

(229 citation statements)

References 21 publications

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“…Some of these studies suggest that superconductivity persists even with no electron doping, [1][2][3] while others show presence of antiferromagnetic long range order in the lightly doped regime, 4,5) so that the issue is still controversial. It was also shown experimentally that the "pseudo gap", [6][7][8][9][10] a prominent feature of the cuprates, disappears if the antiferromagnetism is suppressed. 11) This is consistent with a theoretical study, which shows that the pseudo gap in the electron-doped case originates from the antiferromagnetism.…”

Section: Introductionmentioning

confidence: 93%

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High T_c Cuprates

2017

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Recent experiments revealed a striking asymmetry in the phase diagram of the high temperature cuprate superconductors. The correlation effect seems strong in the hole-doped systems and weak in the electrondoped systems. On the other hand, a recent theoretical study shows that the interaction strengths (the Hubbard U ) are comparable in these systems. Therefore, it is difficult to explain this asymmetry by their interaction strengths. Given this background, we analyze the one-particle spectrum of a single band model of a cuprate superconductor near the Fermi level using the dynamical mean field theory. We find the difference in the "visibility" of the strong correlation effect between the hole-and electron-doped systems. This can explain the electron-hole asymmetry of the correlation strength without introducing the difference in the interaction strength.

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Section: Introductionmentioning

confidence: 93%

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High T_c Cuprates

2017

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“…During that period, as I explained above, the only possible attitude for me was to stu ng publications through the "High T c update" abstracts archives channel, which was transformed later into the condmat archives sections. This is where I discovered that all NMR specialists were working quite naturally on 63 Cu NMR to get information on the SC properties. But I noticed a single work on 89 Y NMR, which revealed that, though out of the planes, this nucleus was still weakly coupled to the electronic properties of the planes and could be used to monitor them [50].…”

Section: The "Prehistormentioning

confidence: 99%

“…Measurements done in the group of A. Heeger (chemistry Nobel prize in 2000) revealed that the 63 Cu width increased below 30 K somewhat faster than expected from the high T CurieWeiss susceptibility, and saturated at low T [23]. This was initially taken as a signature of the development of a static polarized cloud anti-parallel to the local impurity magnetization.…”

Section: Spatial Extent Of the Kondo Singlet?mentioning

confidence: 99%

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From Friedel Oscillations and Kondo Effect to the Pseudogap in Cuprates

Alloul

2012

J Supercond Nov Magn

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Abstract. One of the great achievements performed by Jacques Friedel in France has been to promote experimental activities on the electronic properties in condensed matter physics, which has led him, among others, to be an active promoter of the up-rise of the "Laboratoire de Physique des Solides" (LPS). I have had the chance to be involved in this process in the early days and to create a Nuclear Magnetic Resonance (NMR) group which remains active nowadays. Among various other scientific activities, I have performed some work on Kondo effect in the 1970's which has allowed me to enlighten the real interest of the NMR probe as a local experimental technique to visualize the perturbation brought by impurities in normal metals. These experiments were of course driven by my strong exposure to J. Friedel's education on charge and spin density oscillations in metals. This work has been also my first personal contact with correlated electron physics, a field in which I have been involved for years particularly since the discovery of high T c cuprates (HTSC). I recall that the early NMR experiments done in these systems have given evidence for the existence of strong electronic correlations and established the occurrence of the "pseudogap", on which I have initially had some exchanges with J. Friedel. The pseudogap, occurring below a temperature T*, has during the last twenty years raised endless discussions about the incidence of correlations on superconductivity. Many researchers are still advocating today that the pseudogap is due to the existence of preformed pairs above T c . I shall show that its robustness to impurities and disorder that we evidenced from the early days rather suggested that it results from a competing order of the correlated state. This is apparently better accepted nowadays, although various distinct ordered states detected below T* are not yet understood. The short reviews of the work done on Kondo effect and on the cuprates in Orsay allow me to enlighten the importance of the initial choices done by J. Friedel for the LPS. I also underline the large contrast between the scientific behaviours which prevailed between these two periods of scientific activity. This is not only ascribed to the discovery of the HTSC but also to the changes in publication policies and to the modification of evaluation procedures, all this being driven by the advent of information technologies. I suggest that these changes might have a negative incidence, in my opinion, on the research and education system, at least in our field of science.

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“…Transport experiments [14], ARPES [2,3], NMR [15,16], and optical conductivity [17,18] all detect a loss of spectral weight at low energies in the one-particle excitation spectrum below a certain temperature, T * > T c . Furthermore, the k-specific nature of the ARPES technique has shown that the pseudogap has nodes at the same places as the superconducting gap.…”

Section: Introductionmentioning

confidence: 99%

BCS to Bose crossover in anisotropic superconductors

Wallington

Annett

2000

Phys. Rev. B

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In this work we use functional integral techniques to examine the nearest neighbour attractive Hubbard model on a quasi-2D lattice. It is a simple phenomenological model for the high-Tc cuprates that allows both extended (non-local) s-and d-wave singlet superconductivity as well as mixed symmetry states. The Hartree-Gor'kov mean field theory of the model has a finite temperature phase diagram which shows a transition from pure s-wave to pure d-wave superconductivity, via a mixed symmetry s + id state, as a function of doping. Including Gaussian fluctuations we examine the crossover from weak-coupling BCS superconductivity to the strong-coupling Bose-Einstein condensation of composite s-or d-wave bosons and comment on the origin and symmetry of the pseudogap.

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Cu spin dynamics and superconducting precursor effects in planes aboveTcinYBa2

Cited by 454 publications

References 21 publications

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High T_c Cuprates

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High T_c Cuprates

From Friedel Oscillations and Kondo Effect to the Pseudogap in Cuprates

BCS to Bose crossover in anisotropic superconductors

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Cu spin dynamics and superconducting precursor effects in planes aboveTcinYBa2

Cited by 454 publications

References 21 publications

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High Tc Cuprates

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High Tc Cuprates

From Friedel Oscillations and Kondo Effect to the Pseudogap in Cuprates

BCS to Bose crossover in anisotropic superconductors

Contact Info

Product

Resources

About

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High T_c Cuprates

DMFT Study on the Electron–hole Asymmetry of the Electron Correlation Strength in the High T_c Cuprates