103 citations · 186 across the 5 of their papers we have counts for
6 papers
Cyclic Spin Exchange in Cuprate Spin Ladders
Tamara S. Nunner, Philipp Brune, Thilo Kopp +2
We investigate the influence of a cyclic spin exchange J_{cyc} on the one- and two-triplet excitations of an undoped two-leg S=1/2 ladder, using the density matrix renormalization…
Magnetic excitations in two-leg spin 1/2 ladders: experiment and theory
M. Grueninger, M. Windt, T. Nunner +8
Magnetic excitations in two-leg S=1/2 ladders are studied both experimentally and theoretically. Experimentally, we report on the reflectivity, the transmission and the optical con…
Optical spectroscopy of (La,Ca)14Cu24O41 spin ladders: comparison of experiment and theory
M. Grueninger, M. Windt, T. Nunner +8
Transmission and reflectivity of La_x Ca_14-x Cu_24 O_41 two-leg spin-1/2 ladders were measured in the mid-infrared regime between 500 and 12000 1/cm. This allows us to determine t…
Infrared and optical properties of pure and cobalt-doped LuNi_2B_2C
M. Windt, J. J. McGuire, T. Room +4
We present optical conductivity data for Lu(NiCo)BC over a wide range of frequencies and temperatures for x=0 and x=0.09. Both materials show evidence of being…
Observation of two-magnon bound states in the two-leg ladders of (Ca,La)14Cu24O41
M. Windt, M. Grueninger, T. Nunner +8
Phonon-assisted 2-magnon absorption is studied at T=4 K in the spin-1/2 two-leg ladders of Ca_14-x La_x Cu_24 O_41 (x=5 and 4) for polarization of the electrical field parallel to…
Scattering Rate Gap in the IR Response of HgBa_2Ca_2Cu_3O_{8+delta}
J. J. McGuire, M. Windt, T. Startseva +3
The ab-plane optical spectra of one underdoped and one nearly optimally doped single crystal of HgBa_2Ca_2Cu_3O_{8+delta} were investigated in the frequency range from 40 to 40,000…