Year: 2008
Type: article
Abstract: We report the observation of quantum oscillations in the underdoped cuprate superconductor ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{4}{\mathrm{O}}_{8}$ using a tunnel-diode oscillator technique in pulsed magnetic fields up to 85 T. There is a clear signal, periodic in inverse field, with frequency $660\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{T}$ and possible evidence for the presence of two components of slightly different frequency. The quasiparticle mass is ${m}^{*}=3.0\ifmmode\pm\else\textpm\fi{}0.3{m}_{e}$. In conjunction with the results of Doiron-Leyraud et al. for ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6.5}$, the present measurements suggest that Fermi surface pockets are a general feature of underdoped copper oxide planes and provide information about the doping dependence of the Fermi surface.
Source: Physical Review Letters
Institutions: Los Alamos National Laboratory, Northern Illinois University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G8012472167
OpenAlex ID: W1531487561