Multiferroicity in the spin-1/2 quantum matter of LiCu2O2 (2008)
Rusydi, A., Mahns, I., Mueller, S., Ruebhausen, M., Park, S., Choi, Y. J., ...
Multiferroicity in LiCu2O2 single crystals is studied using resonant soft x-ray magnetic scattering, hard x-ray diffraction, heat capacity, magnetic susceptibility, and electrical polarization. Two...
Metal to insulator transition in manganites - optical conductivity changes up to 24 eV (2007)
Rusydi, A., Rauer, R., Neuber, G., Bastjan, M., Mahns, I., Müller, S., ...
The electronic response of doped manganites at the transition from the paramagnetic insulating to the ferromagnetic metallic state in $\rm La_{1-x}Ca_{x}MnO_3$ for $\rm (x=0.3,0.2)$ was investigated...
Strain amplification of the 4k$_F$ chain charge instability in Sr$_{14}$Cu$_{24}$O$_{41}$ (2006)
Rusydi, A., Abbamonte, P., Eisaki, H., Fujimaki, Y., Smadici, S., Motoyama, N., ...
We have used resonant soft x-ray scattering (RSXS) to study the misfit strain in Sr$_{14}$Cu$_{24}$O$_{41}$ (SCO), a cuprate that contains both doped spin ladders and spin chains, as well as a...
Nitrogen based magnetic semiconductors (2006)
Elfimov, I. S., Rusydi, A., Csiszar, S. I., Hu, Z., Hsieh, H. H., ...
We describe a possible pathway to new magnetic materials with no conventional magnetic elements present. The substitution of Nitrogen for Oxygen in simple non magnetic oxides leads to holes in N 2$p$...
Experimental evidence of paired hole states in model high-$T_c$ compounds (2006)
Rusydi, A., Abbamonte, P., Berciu, M., Smadici, S., Eisaki, H., Fujimaki, Y., ...
The distribution of holes in Sr$_{14-x}$Ca$_x$Cu$_{24}$O$_{41}$ (SCCO) is revisited with semi-emperical reanalysis of the x-ray absorption (XAS) data and exact-diagonalized cluster calculations. A...
Quantum melting of the hole crystal in the spin ladder of Sr14-xCaxCu24O41 (2005)
Rusydi, A., Abbamonte, P., Eisaki, H., Fujimaki, Y., Blumberg, G., Uchida, S., ...
The "spin ladder" is a reduced-dimensional analogue of the high temperature superconductors that was predicted to exhibit both superconductivity and an electronic charge density wave or "hole...
Spatially modulated "Mottness" in La2-xBaxCuO4 (2005)
Abbamonte, P., Rusydi, A., Smadici, S., Gu, G. D., Sawatzky, G. A., Feng, D. L.
Stripe phases were predicted to arise in doped antiferromagnets through competition between magnetism and the kinetic energy of mobile carriers (typically holes). In copper-oxides the main...
Hole crystallization in the spin ladder of Sr14Cu24O41 (2005)
Abbamonte, P., Blumberg, G., Rusydi, A., Gozar, A., Evans, P. G., Siegrist, T., ...
One of the deepest questions in condensed matter physics concerns what other phases compete with superconductivity in high-transition-temperature (high-Tc) superconductors. One candidate is the...
Zooming-in on the charge ordering in YBa2Cu3O6.5 (2004)
Feng, D. L., Rusydi, A., Abbamonte, P., Venema, L., Elfimov, I., Liang, R., ...
We report direct evidence of charge/orbital ordering of low energy electronic states of $Cu$ in YBa$_2$Cu$_3$O$_{6+x}$ ortho-II phase in both the $CuO_3$ chain and the CuO$_2$ plane. Huge enhancement...
Thomas, K J, Hill, J P, Grenier, S, Kim, Y J, Abbamonte, P, Venema, L, ...
Thomas, K. J., Hill, J. P., Kim, Y-J., Grenier, S., Abbamonte, P., Venema, L., ...
We have utilized the resonant x-ray diffraction technique at the Mn L-edge in order to directly compare magnetic and orbital correlations in the Mn sub-lattice of Pr0.6Ca0.4MnO3. The resonant line...
A Structural Probe of the Doped Holes in Cuprate Superconductors (2002)
Abbamonte, P., Venema, L., Rusydi, A., Sawatzky, G. A., Logvenov, G., Bozovic, I.
An unresolved issue concerning cuprate superconductors is whether the distribution of carriers in the CuO(2) plane is uniform or inhomogeneous. Because the carriers comprise a small fraction of the...