Volume 114, Number 4, May 2016
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||21 June 2016|
Quantum oscillation as diagnostics of pseudogap state in underdoped cuprates
1 International Center for Quantum Materials, School of Physics, Peking University - Beijing, 100871, China
2 Institute for Advanced Study, Tsinghua University - Beijing, 100084, China
3 Perimeter Institute for Theoretical Physics - Waterloo, Ontario, N2L 2Y5, Canada
Received: 19 February 2016
Accepted: 2 June 2016
The Fermi surface in underdoped cuprates is reconstructed by the charge density wave (CDW) order in the pseudogap phase. Theoretical proposals can be divided into two classes: one assumes the underlying Fermi surface without CDW as a conventional large surface; the other assumes small hole-like Fermi pockets. In both scenarios, we theoretically study the quantum oscillation and find three evenly spaced peaks in the oscillation spectra. The central dominant peak is induced by the CDW order. Its effective mass is strongly enhanced as the CDW vanishes in agreement with experiments. But the two scenarios have different understandings of the subdominant satellite peaks. In the large-surface scenario they are induced by the interlayer tunneling between the bilayer CuO2 planes. Their effective masses are also enhanced with descreasing CDW. In the small-pocket scenario one of the subdominant peaks comes from the original small Fermi pockets of the pseudogap state. Its effective mass is nearly independent of the CDW strength and increases monotonically with the doping. We propose future quantum oscillation experiments to test these different predictions and thus to clarify the underlying Fermi surface structure of the pseudogap state.
PACS: 74.72.-h – Cuprate superconductors / 74.72.Kf – Pseudogap regime / 71.45.Lr – Charge-density-wave systems
© EPLA, 2016
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