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Theory of quantum magneto-oscillations in underdoped cuprate superconductors

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A S Alexandrov

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FAST TRACK COMMUNICATION

Solving the Gross–Pitaevskii-type equation it is shown that the magneto-oscillations observed in the superconducting state of a few underdoped cuprates originate in the quantum interference of the vortex lattice with nanoscale crystal lattice modulations of the order parameter as revealed by scanning tunneling microscopy. The commensuration of the vortex lattice and crystal lattice have 1/B1/2 periodicity, rather than the 1/B periodicity of conventional normal state magneto-oscillations. Experimental conditions allowing for a resolution of quantum magneto-oscillations of two different types are outlined.


PACS

74.72.Bk Y-based cuprates

74.20.-z Theories and models of superconducting state

68.37.Ef Scanning tunneling microscopy (including chemistry induced with STM)

74.25.Qt Vortex lattices, flux pinning, flux creep

74.25.Op Mixed states, critical fields, and surface sheaths

Subjects

Superconductivity

Surfaces, interfaces and thin films

Dates

Issue 19 (14 May 2008)

Received 8 March 2008

Published 17 April 2008



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