Stripes and Related Phenomena by K. A. Müller (auth.), Antonio Bianconi, Naurang L. Saini

By K. A. Müller (auth.), Antonio Bianconi, Naurang L. Saini (eds.)

The challenge of superconductors has been a vital factor in strong country Physics because 1987. After the invention of superconductivity (HTSC) in doped perovskites, it was once learned that the HTSC seems to be in an unknown advanced digital part of c- densed topic. within the early years, all theories of HTSC have been concerned about the physics of a homogeneous second steel with huge electron–electron correlations or on a 2nd polaron fuel. in simple terms after 1990, a singular paradigm began to develop the place this 2nd steel part is defined as an inhomogeneous steel. This was once the result of numerous experimental evidences of part separation at low doping. for the reason that 1992, a sequence of meetings on section separation have been geared up to permit scientists to social gathering to debate the section separation and similar concerns. Following the invention via the Rome crew in 1992 that “the fees stream freely generally in a single path just like the water working within the grooves within the corrugated iron foil,” a brand new situation to appreciate superconductivity within the superconductors used to be open. as the fees stream like rivers, the physics of those fabrics shifts towards the physics of novel mesoscopic heterostructures and complicated digital solids. hence, knowing the striped stages within the perovskites not just offers a chance to appreciate the anomalous metal country of cuprate superconductors, but in addition indicates how to layout new fabrics of technological value. certainly, the stripes have gotten a box of basic clinical interest.

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Conradson, D. Raistrich, and A. R. Bishop, Science 248, 1394 (1990); T. , Proceedings of the International Workshop on Anharmonic Properties of Cuprates, Bled 1994, D. Mihailovic, G. Ruani, E. Kaldis, and K. A. Müller, eds. (World Scientific, Singapore, 1994), p. 118; H. L. , Phys. Rev. Lett. 73, 1154 (1994); see also the contributions presented in this special issue. 3. A. Bussmann-Holder and A. R. Bishop, Phys. Rev. B 56,5297 (1997); A. Bussmann-Holder and A. R. Bishop, 4. 5. 6. 7. J. Supercond.

The quasi-particle fields are strongly coupled to each other due to hopping and hybridization terms of the Hamiltonian. This coupling can be expressed through an effective Hamiltonian term whose parameters can in principle be derived self-consistently from the original Hamiltonian. It has the form The auxiliary space spectral functions are calculated through the standard diagrammatic technique where introduces a vertex connecting QE, stripon, and spinon propagators. It turns out that the stripon bandwidth is at least an order of magnitude smaller than the QE and spinon bandwidths.

Thus, one expects to saturate at to the narrow-band result [17] 36 Ashkenazi where is the fractional occupation of the stripon band. This result for the TEP is consistent with the typical behavior observed in the cuprates. Such a behavior has been parametrized as [18] It was found [ 17, 19] that (namely, the stripon band is half full) for slightly overdoped cuprates. The effect of the doping of a cuprate is [7] both to change the density of the charged stripes within a plane and to change the density of carriers (stripons) within a charged stripe.

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