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The emergence of coherent magnetic excitations in the pseudogap phase of La2-xSrxCuO4
O. J. Lipscombe, B. Vignolle, T. G. Perring +2
We use inelastic neutron scattering to measure the magnetic excitations in the underdoped superconductor La2-xSrxCuO4 (x=0.085, Tc=22 K) over energy and temperatures ranges 5 < E <…
de Haas-van Alphen oscillations in the underdoped cuprate YBaCuO
C. Jaudet, D. Vignolles, A. Audouard +11
The de Haas-van Alphen effect was observed in the underdoped cuprate YBaCuO via a torque technique in pulsed magnetic fields up to 59 T. Above an irreversibility fi…
Shubnikov-de Haas oscillations in YBa_2Cu_4O_8
A. F. Bangura, J. D. Fletcher, A. Carrington +10
We report the observation of Shubnikov-de Haas oscillations in the underdoped cuprate superconductor YBaCuO (Y124). For field aligned along the c-axis, the frequency of…
The Persistence of High-Frequency Spin Fluctuations in Overdoped LaSrCuO (=0.22)
O. J. Lipscombe, S. M. Hayden, B. Vignolle +2
We report a detailed inelastic neutron scattering study of the collective magnetic excitations of overdoped superconducting La1.78Sr0.22CuO4 for the energy range 0-160 meV. Our mea…
Two energy scales in the spin excitations of the high-T_c superconductor LaSrCuO
B. Vignolle, S. M. Hayden, D. F. McMorrow +4
The excitations responsible for producing high-temperature superconductivity in the cuprates have not been identified. Two promising candidates are collective spin excitations and…