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Effects of biquadratic exchange on the spectrum of elementary excitations in spin ladders
S. Brehmer, H. -J. Mikeska, M. Mueller +2
We investigate the influence of biquadratic exchange interactions on the low-lying excitations of a S=1/2-ladder using perturbation theory, numerical diagonalization of finite syst…
Glassy nature of stripe ordering in La(1.6-x)Nd(0.4)Sr(x)CuO(4)
J. M. Tranquada, N. Ichikawa, S. Uchida
We present the results of neutron-scattering studies on various aspects of crystalline and magnetic structure in single crystals of La(1.6-x)Nd(0.4)Sr(x)CuO(4) with x=0.12 and 0.15…
Unconventional Transition from Metallic to Insulating Resistivity in the Spin-ladder Compound (Sr,Ca)CuO
F. F. Balakirev, J. B. Betts, G. S. Boebinger +3
Spin-ladder compounds make interesting analogs of the high-temperature superconductors, because they contain layers of nearly one-dimensional "ladders" consisting of a square array…
Doping Dependent Density of States and Pseudogap Behavior in La2-xSrxCuO4
A. Ino, T. Mizokawa, K. Kobayashi +7
We have made a high-resolution photoemission study of La2-xSrxCuO4 in a wide hole concentration (x) range from a heavily overdoped metal to an undoped insulator. As x decreases, th…