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Spin dynamics of Sr_14Cu_24O_41 two-leg ladder studied by Raman spectroscopy
A. Gozar, G. Blumberg, B. S. Dennis +4
The two-magnon (2M) excitation at 3000 cm-1 in Sr_14Cu_24O_41 two-leg ladder is studied by Raman scattering. A slight anisotropy of the superexchange coupling J_{\perp}/J_{||} \app…
Microwave and millimeter wave spectroscopy in the slightly hole-doped ladders of SrCuO
H. Kitano, R. Inoue, T. Hanaguri +6
We have measured the temperature- and frequency dependence of the microwave and millimeter wave conductivity along both the ladder (c-axis) and the leg (a-axis) directio…
Momentum-Resolved Charge Excitations in a Prototype One Dimensional Mott Insulator
M. Z. Hasan, P. A. Montano, E. D. Isaacs +6
We report momentum resolved charge excitations in a one dimensional (1-D) Mott insulator studied using high resolution (~ 325 meV) inelastic x-ray scattering over the entire Brillo…
Bilayer Splitting in the Electronic Structure of Heavily Overdoped Bi2Sr2CaCu2O8+d
D. L. Feng, N. P. Armitage, D. H. Lu +11
The electronic structure of heavily overdoped BiSrCaCuO is investigated by angle-resolved photoemission spectroscopy. The long-sought bilayer band splitting in…
Doubling of the bands in overdoped Bi2Sr2CaCu2O8-probable evidence for c-axis bilayer coupling
Y. -D. Chuang, A. D. Gromko, A. Fedorov +6
We present high resolution ARPES data of the bilayer superconductor Bi2Sr2CaCu2O8 (Bi2212) showing a clear doubling of the near EF bands. This splitting approaches zero along the (…
Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
A. Lanzara, P. V. Bogdanov, X. J. Zhou +12
Coupling between electrons and phonons (lattice vibrations) drives the formation of the electron pairs responsible for conventional superconductivity. The lack of direct evidence f…