Velocity renormalization in high-Ta cuprates

Meir Weger

doi:10.1117/12.182691

Velocity renormalization in high-Ta cuprates

Meir Weger

Racah Institute of Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

We consider a low-density electron-gas (rs 1016) imbedded in a highly dispersive medium (EO/E 10). We find that the Fermi velocity is greatly enhanced over the single-particle value. This enhancement occurs only very close to the Fermi surface, within an energy range smaller than wc, the characteristic frequency of the dispersion. This theory applies to high-Ta cuprates, as well as to several other systems. It accounts for the highly-Anomalous transport properties in the normal state. We believe that it also accounts for the high value of T, based on the standard phonon-mediated interaction BCS theory. There exist some experimental indications for a greatly-enhanced Fermi velocity in YBa2Cu3O7.

Original language	English
Pages (from-to)	14-25
Number of pages	12
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2158
DOIs	https://doi.org/10.1117/12.182691
State	Published - 10 Aug 1994
Event	Oxide Superconductor Physics and Nano-Engineering 1994 - Los Angeles, United States Duration: 23 Jan 1994 → 29 Jan 1994

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© 1994 Proceedings of SPIE - The International Society for Optical Engineering. All rights reserved.

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abstract = "We consider a low-density electron-gas (rs 1016) imbedded in a highly dispersive medium (EO/E 10). We find that the Fermi velocity is greatly enhanced over the single-particle value. This enhancement occurs only very close to the Fermi surface, within an energy range smaller than wc, the characteristic frequency of the dispersion. This theory applies to high-Ta cuprates, as well as to several other systems. It accounts for the highly-Anomalous transport properties in the normal state. We believe that it also accounts for the high value of T, based on the standard phonon-mediated interaction BCS theory. There exist some experimental indications for a greatly-enhanced Fermi velocity in YBa2Cu3O7.",

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AB - We consider a low-density electron-gas (rs 1016) imbedded in a highly dispersive medium (EO/E 10). We find that the Fermi velocity is greatly enhanced over the single-particle value. This enhancement occurs only very close to the Fermi surface, within an energy range smaller than wc, the characteristic frequency of the dispersion. This theory applies to high-Ta cuprates, as well as to several other systems. It accounts for the highly-Anomalous transport properties in the normal state. We believe that it also accounts for the high value of T, based on the standard phonon-mediated interaction BCS theory. There exist some experimental indications for a greatly-enhanced Fermi velocity in YBa2Cu3O7.

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T2 - Oxide Superconductor Physics and Nano-Engineering 1994

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Velocity renormalization in high-Ta cuprates

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