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Magnetic breakdown and quantum oscillations in electron-doped high-temperature superconductor Nd 2 − x Ce x CuO 4

Magnetic breakdown and quantum oscillations in electron-doped high-temperature superconductor Nd... Recent, more precise experiments have revealed both a slow and a fast quantum oscillation in the c -axis resistivity of nearly optimal to overdoped electron-doped high-temperature superconductor Nd 2 − x Ce x CuO 4 . Here, we study this problem from the perspective of Fermi surface reconstruction using an exact transfer matrix method and the Pichard-Landauer formula. In this method, neither quasiclassical approximations for magnetic breakdown nor ad hoc broadening of Landau levels is necessary to study the high-field quantum oscillations. The underlying Hamiltonian is a mean-field Hamiltonian that incorporates a twofold commensurate Fermi surface reconstruction. While the specific mean field considered is the d -density wave, similar results can also be obtained by a model of a spin density wave, as was explicitly demonstrated earlier. The results are consistent with an interplay of magnetic breakdown across small gaps in the reconstructed Fermi surface and Shubnikov–de Haas oscillations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Magnetic breakdown and quantum oscillations in electron-doped high-temperature superconductor Nd 2 − x Ce x CuO 4

Eun, Jonghyoun; Chakravarty, Sudip
Physical Review B , Volume 84 (9) – Sep 1, 2011
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References (2)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2011 The American Physical Society
ISSN
1098-0121
eISSN
1550-235X
DOI
10.1103/PhysRevB.84.094506
Publisher site
See Article on Publisher Site

Abstract

Recent, more precise experiments have revealed both a slow and a fast quantum oscillation in the c -axis resistivity of nearly optimal to overdoped electron-doped high-temperature superconductor Nd 2 − x Ce x CuO 4 . Here, we study this problem from the perspective of Fermi surface reconstruction using an exact transfer matrix method and the Pichard-Landauer formula. In this method, neither quasiclassical approximations for magnetic breakdown nor ad hoc broadening of Landau levels is necessary to study the high-field quantum oscillations. The underlying Hamiltonian is a mean-field Hamiltonian that incorporates a twofold commensurate Fermi surface reconstruction. While the specific mean field considered is the d -density wave, similar results can also be obtained by a model of a spin density wave, as was explicitly demonstrated earlier. The results are consistent with an interplay of magnetic breakdown across small gaps in the reconstructed Fermi surface and Shubnikov–de Haas oscillations.

Journal

Physical Review B – American Physical Society (APS)

Published: Sep 1, 2011

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