Fermi surface and electronic structure of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mi mathvariant="normal">−</mml:mi><mml:mi mathvariant="italic">x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi></mml:mrow><mml:mrow>

King, David M.; Shen, Zhi‐Xun; Dessau, D. S.; Wells, B. O.; Spicer, W. E.; Arko, A. J.; Marshall, D. S.; DiCarlo, Jeffrey M.; Loeser, A. G.; Park, C. H.; Ratner, Edward; Peng, Jie; Li, Z. Y.; Greene, R. L.

doi:10.1103/physrevlett.70.3159

Cited by 194 publications

(95 citation statements)

References 19 publications

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“…With this technique no density of states is found near the Fermi energy E F for the parent insulating materials, whereas for the doped metallic samples a clear Fermi level is present in the measurements [1,2], proving the fermionic character of the states near E F . Another important result obtained with photoelectron spectroscopy is that angle resolved measurements indicate a Fermi surface that agrees well in size and shape with predictions of band structure calculations [3][4][5][6][7]. This agreement is remarkable, because in these calculations the correlations between the electrons is generally neglected.…”

Section: Introductionsupporting

confidence: 61%

Doping dependence of the chemical potential in cuprate high-Tc superconductors I. La2−xSrxCuO4

Rietveld

Glastra

Marel

1995

Physica C: Superconductivity

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cA systematic study is performed of the doping dependence of the chemical potential µ in La2−xSrxCuO4 as a function of Sr content, using a well-characterized series of pellets and thin films. The measured shift of the chemical potential, as deduced from the changes in the photoelectron spectra, is compared with present models for the doping behaviour of µ in high-Tc materials. The results obtained can be best described assuming µ shifts due to the doping of a rigid narrow band.

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Section: Introductionsupporting

confidence: 61%

Doping dependence of the chemical potential in cuprate high-Tc superconductors I. La2−xSrxCuO4

Rietveld

Glastra

Marel

1995

Physica C: Superconductivity

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“…Comparing this previous report with present work, we find that the large value of A is mainly due to the surface degradation. Nonetheless, the anisotropic s-wave symmetry seems to be reasonable considering the crystallographic symmetry and the topology of Fermi surface (FS) of NCCO [39,40]. In Fig.…”

Section: B Theoretical Model -S-wave Btk Theorymentioning

confidence: 99%

Distinct pairing symmetries inNd1.85Ce0.15CuO4−yandLa1.89

et al. 2005

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We used point-contact tunnelling spectroscopy to study the superconducting pairing symmetry of electron-doped N d1.85Ce0.15CuO4−y (NCCO) and hole-doped La1.89Sr0.11CuO4 (LSCO). Nearly identical spectra without zero bias conductance peak (ZBCP) were obtained on the (110) and (100) oriented surfaces (the so-called nodal and anti-nodal directions) of NCCO. In contrast, LSCO showed a remarkable ZBCP in the nodal direction as expected from a d-wave superconductor. Detailed analysis reveals an s-wave component in the pairing symmetry of the NCCO sample with ∆/kBTc = 1.66, a value remarkable close to that of a weakly coupled BCS superconductor. We argue that this s-wave component is formed at the Fermi surface pockets centered at (±π,0) and (0,±π) although a d-wave component may also exist.

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“…10 we show results for the spin susceptibility Im χ RP A (Q, ω) in the optimally electron(a)-and hole(b)-doped cuprates in the normal and superconducting state taking into account different tight-binding energy dispersions 19,39 . While in the normal state of holedoped cuprates ω sf is of order of 25 meV, in the electrondoped ones its value is much larger (ω sf ≈ 70 meV) and Im χ is much less pronounced.…”

Section: Relation Of Kink and Resonance Peakmentioning

confidence: 99%

“…(3). The description of the electron-and hole-doped cuprates within a one-band approximation is possible if one takes into account different parameters and quasiparticle dispersion 19 . Note that in the case of electron doping the electrons occupy the copper d-band, while in the hole-doped case holes refer mainly to the oxygen p-states yielding different dispersion parameters.…”

Section: Theorymentioning

confidence: 99%

Renormalization of the elementary excitations in hole- and electron-doped cuprates due to spin fluctuations

2003

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Extending our previous studies we present results for the doping-, momentum-, frequency-, and temperature-dependence of the kink-like change of the quasiparticle velocity resulting from the coupling to spin fluctuations. In the nodal direction a kink is found in both the normal and superconducting state while in the antinodal direction a kink occurs only below Tc due to the opening of the superconducting gap. A pronounced kink is obtained only for hole-doped, but not for electrondoped cuprates and is characteristically different from what is expected due to electron-phonon interaction. We further demonstrate that the kink structure is intimately connected to the resonance peak seen in inelastic neutron scattering. Our results suggest similar effects in other unconventional superconductors like Sr2RuO4. 74.20.Mn, 74.25.Ha

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Fermi surface and electronic structure ofNd2−xCe

Cited by 194 publications

References 19 publications

Doping dependence of the chemical potential in cuprate high-Tc superconductors I. La2−xSrxCuO4

Doping dependence of the chemical potential in cuprate high-Tc superconductors I. La2−xSrxCuO4

Distinct pairing symmetries inNd1.85Ce0.15CuO4−yandLa1.89

Renormalization of the elementary excitations in hole- and electron-doped cuprates due to spin fluctuations

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