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pro vyhledávání: '"J.R. Schrieffer"'
The search for microscopic models to explain the many superconducting substances has introduced seminal concepts and techniques in many-body physics and in statistical mechanics. The complexity of the high-temperature superconductors has required a r
Autor:
J.R. Schrieffer
Publikováno v:
J Res Natl Bur Stand A Phys Chem
The concept of a quasi-particle excitation in an interacting many-body system will be discussed from both the physical and the mathematical points of view. The physical origin of mass enhancement, wave function renormalization, interactions between q
Autor:
J.R. Schrieffer
Publikováno v:
Current Applied Physics. 4:465-472
The physics understanding novel quantum numbers in condensed matter physics are discussed. Examples are given from the fields of conducting quasi-one-dimensional conductors 3 He–A and the fractional quantum Hall effect. A common feature of these sy
Autor:
J.R. Schrieffer
Publikováno v:
Current Applied Physics. 1:287-290
We study a semi-classical approach to the determination of the oscillatory magnetization of an anisotropic superconductor in a magnetic field. The field is such that the spacing d between flux tubes is large compared to the coherence length ξ0 and i
Autor:
J.R. Schrieffer
Publikováno v:
Current Applied Physics. 1:3-8
The origin of the pseudo gap in low carrier density superconductors is discussed. The role of phase fluctuations of the order parameter lead to destruction of long range order, preserving the short range order observed in tunneling and photoemission
Autor:
J.R Schrieffer
Publikováno v:
Physica B: Condensed Matter. :433-439
Several approaches to the theory of high temperature superconductivity are discussed. These include weak and strong coupling approaches as well as phase fluctuation and renormalized quasi particle approaches to under doped materials. Quasi particles
Autor:
J.R. Schrieffer
Publikováno v:
Journal of Physics and Chemistry of Solids. 59:1678-1681
The interpretation of the pseudogap observed in the normal phase photoemission spectra of Bi2212 is discussed in terms of a boson scattering model. Also, the nature of quasi-particle excitations in short coherence length superconductors is presented,
Autor:
J.R. Schrieffer, Arno P. Kampf
Publikováno v:
Journal of Physics and Chemistry of Solids. 56:1673-1677
The physical origin of two effects, i.e. shadow bands and three peaked energy spectra in the ARPES and inverse photoemission spectra of strongly correlated electron systems, such as the cuprates, are discussed. Shadow bands arise from quasi elastic e
Autor:
J.R. Schrieffer
Publikováno v:
Solid State Communications. 92:129-139
The symmetry of the order parameter in cuprate superconductors is discussed. The case for singlet spin pairing is very strong, while evidence for d vs. s wave orbital pairing is yet to be resolved. Possibly both d and s wave examples are found in the
Autor:
Zachary Fisk, J.R. Schrieffer
Publikováno v:
MRS Bulletin. 18:23-28
The study of materials which have electronic phase transitions is a very active area. Such phase transitions include charge and spin density formation, as well the superconducting condensation in a rapidly expanding variety of materials. It is now co