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On the Fermi Surface of YBa2Cu3O7-δ

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Published in Europhysics Letters. 1992, vol. 18, no. 4, p. 313-317
Abstract We show that the signature of a Fermi surface sheet of YBa2Cu3O7-δ may be obtained unambiguously from twinned crystals. Comparison of electron-positron momentum density from YBa2Cu3O7-δ measured both in insulating and (superconducting) twinned phases leads to a decisive further proof of the existence of the Fermi surface in the metallic YBa2Cu3O7-δ. In addition, measurements on untwinned YBa2Cu3O7-δ single crystals reveal also a "ridge" Fermi surface sheet attributed by band structure calculations to CuO chains.
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PETER, Martin et al. On the Fermi Surface of YBa2Cu3O7-δ. In: Europhysics Letters, 1992, vol. 18, n° 4, p. 313-317. https://archive-ouverte.unige.ch/unige:117477

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Deposited on : 2019-05-15

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