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Magneto-optical evidence for a gapped Fermi surface in underdoped YBa2Cu3O6+x

L. B. Rigal·D. C. Schmadel·H. D. Drew·B. Maiorov·E. Osquigil·J. S. Preston·R. Hughes·G. D. Gu
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Abstract

The infrared (900-1100 cm-1) Faraday rotation and circular dichroism are measured in the normal state of underdoped High Tc superconductors and used to study the magneto-transport. YBa2Cu3O6+x thin films are investigated in the temperature range 10-300 K in magnetic fields up to 8 Tesla and as a function of oxygen concentration. A dramatic increase of the Hall frequency is observed for underdoped samples which is not consistent with the approach to a Mott transition but is consistent with a partial gapping of the Fermi surface as predicted in charge density wave models.

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L. B. Rigal, D. C. Schmadel, H. D. Drew, B. Maiorov, E. Osquigil, J. S. Preston, R. Hughes, G. D. Gu. 2003-09-11. Magneto-optical evidence for a gapped Fermi surface in underdoped YBa2Cu3O6+x. https://doi.org/10.1103/physrevlett.93.137002

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