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Digitale Medien

Topological interpretation of the Van Hove singularity: Orbital switching (1994)

Markiewicz, R. S.

Springer

Journal of superconductivity 7 (1994), S. 803-807

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ISSN: 1572-9605

Schlagwort(e): Magnetic breakdown ; charge-density waves ; electron-phonon coupling ; structural phase transition

Quelle: Springer Online Journal Archives 1860-2000

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik

Notizen: Abstract Recent theoretical and (photoemission) experimental results greatly strengthen the case for the saddle point van Hove singularity (vHs) playing an important role in the cuprate superconductors. The vHs signals a change in the topology of the Fermi surface-usually from electronlike to holelike orbits. Thus, near the vHs, there can be tunneling between the different Fermi surface sections. This orbital switching bears some resemblance to magnetic breakdown, but is a distinct phenomenon. In the presence of finite orbit switching, the electronic orbits can form a quantum coherent network.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01320873

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