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de Haas–van Alphen Oscillations in the Underdoped High-Temperature Superconductor <?format ?> YBa 2 Cu 3 O 6.5

de Haas–van Alphen Oscillations in the Underdoped High-Temperature Superconductor YBa... The de Haas–van Alphen effect was observed in the underdoped cuprate YBa 2 Cu 3 O 6.5 via a torque technique in pulsed magnetic fields up to 59 T. Above a field of ∼ 30 T the magnetization exhibits clear quantum oscillations with a single frequency of 540 T and a cyclotron mass of 1.76 times the free electron mass, in excellent agreement with previously observed Shubnikov–de Haas oscillations. The oscillations obey the standard Lifshitz-Kosevich formula of Fermi-liquid theory. This thermodynamic observation of quantum oscillations confirms the existence of a well-defined, closed, and coherent, Fermi surface in the pseudogap phase of cuprates. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review Letters American Physical Society (APS)

de Haas–van Alphen Oscillations in the Underdoped High-Temperature Superconductor <?format ?> YBa 2 Cu 3 O 6.5

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Publisher
American Physical Society (APS)
Copyright
Copyright © 2008 The American Physical Society
ISSN
1079-7114
DOI
10.1103/PhysRevLett.100.187005
pmid
18518412
Publisher site
See Article on Publisher Site

Abstract

The de Haas–van Alphen effect was observed in the underdoped cuprate YBa 2 Cu 3 O 6.5 via a torque technique in pulsed magnetic fields up to 59 T. Above a field of ∼ 30 T the magnetization exhibits clear quantum oscillations with a single frequency of 540 T and a cyclotron mass of 1.76 times the free electron mass, in excellent agreement with previously observed Shubnikov–de Haas oscillations. The oscillations obey the standard Lifshitz-Kosevich formula of Fermi-liquid theory. This thermodynamic observation of quantum oscillations confirms the existence of a well-defined, closed, and coherent, Fermi surface in the pseudogap phase of cuprates.

Journal

Physical Review Letters – American Physical Society (APS)

Published: May 9, 2008

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