Short-range Charge and Spin Superstructures in Doped Layered Co Perovskites (2008)
Sakiyama, N., Zaliznyak, I. A., Mitsui, Y., Yoshizawa, H.
We have investigated cobaltite relatives of the layered perovskite cuprates and nickelates, Pr$_{2-x}$Ca$_x$CoO$_4$ ($0.39 \leq x \leq 0.73$) and La$_{2-x}$Sr$_x$CoO$_4$ ($x = 0.61$), using elastic...
Essler, F. H. L., Kuzmenko, T., Zaliznyak, I. A.
We study a lattice realization of a Luttinger liquid interacting with a bath of quantum spins in terms of an antiferromagnetic S=1/2 Heisenberg chain, where each spin is also coupled to a \sigma=1/2...
Stripeless incommensurate magnetism in a doped strongly correlated oxide (2006)
Savici, A. T., Zaliznyak, I. A., Gu, G. D., Erwin, R.
We studied the nano-scale structure of the short-range incommensurate magnetic order in La1.5Sr0.5CoO4 by elastic neutron scattering. We find that magnetic diffuse scattering is isotropic in the a-b...
Spinons in the strongly correlated copper oxide chains in SrCuO2 (2004)
Zaliznyak, I A, Woo, H, Perring, T G, Broholm, C, Frost, C D, Takagi, H
Spinons in the strongly correlated copper oxide chains in SrCuO2 (2003)
Zaliznyak, I. A., Woo, H., Perring, T. G., Broholm, C. L., Frost, C. D., Takagi, H.
We have investigated the spin dynamics in the strongly correlated chain copper oxide SrCuO$_2$ for energies up to $\gtrsim 0.6$ eV using inelastic neutron scattering. We observe an acoustic band of...
Universal features of charge and spin order in a half-doped layered perovskite (2003)
Zaliznyak, I. A., Tranquada, J. M., Gu, G., Erwin, R. W., Moritomo, Y.
We have investigated the peculiar structure of charge and spin ordering in the half-doped layered perovskite oxide La$_{1.5}$Sr$_{0.5}$CoO$_4$ by elastic neutron scattering. Two samples with...
Zaliznyak, I. A., Zhitomirsky, M. E.
Classical ground state of the isotropic Heisenberg spin Hamiltonian on a primitive Bravais lattice is known to be a single-Q planar spin spiral. A uniaxial anisotropy and external magnetic field...
Spiral order induced by distortion in frustrated square-lattice antiferromagnet (2003)
In a strongly frustrated square-lattice antiferromagnet with diagonal coupling J', for J/(2J') < 1, an incommensurate spiral state with propagation vector Q = (\pi +/- \delta, \pi +/- \delta) near...
Continuum in the spin excitation spectrum of a Haldane chain (erratum) (2003)
Zaliznyak, I. A., Petrov, S. V.
There was a slight error in calculating the nonlinear sigma-model prediction for the 2-magnon scattering continuum shown in Fig. 2 of cond-mat/0010049, and Phys. Rev. Lett. {\bf 87}, 017202 (2001)....
Structure of end states for a Haldane Spin Chain (2002)
Kenzelmann, M., Xu, G., Zaliznyak, I. A., Broholm, C., DiTusa, J. F., Aeppli, G., ...
Inelastic neutron scattering was used to probe edge states in a quantum spin liquid. The experiment was performed on finite length antiferromagnetic spin-1 chains in Y_2BaNi_{1-x}Mg_xO_5. At finite...
Continuum spin excitations in S=1 one-dimensional antiferromagnet (2001)
We present detailed measurement of the non-hydrodynamic part of the spin excitation spectrum in the model quasi-1D S=1 antiferromagnet CsNiCl3 by inelastic magnetic neutron scattering. In the better...
Spin-entropy driven melting of the charge order in La1.5Sr0.5CoO4 (2001)
Zaliznyak, I. A., Tranquada, J. M., Erwin, R., Moritomo, Y.
We studied the melting of the charge order in the half-doped tetragonal perovskite La1.5Sr0.5CoO4 by elastic neutron scattering. We found that diffuse peaks, corresponding to the breathing-type...
Zaliznyak, I. A., Petrov, S. V.
The spin excitation continuum, expected to dominate the low-energy fluctuation spectrum in the Haldane spin chain around the Brillouin zone center, q=0, is directly observed by inelastic magnetic...
Independent freezing of charge and spin dynamics in La1.5Sr0.5CoO4 (2000)
Zaliznyak, I. A., Hill, J. P., Tranquada, J. M., Erwin, R., Moritomo, Y.
We present elastic and quasielastic neutron scattering measurements characterizing peculiar short-range charge-orbital and spin order in the layered perovskite material La1.5Sr0.5CoO4. We find that...
Anisotropic spin freezing in the S=1/2 zigzag ladder compound SrCuO2 (1998)
Zaliznyak, I. A., Broholm, C., Kibune, M., Nohara, M., Takagi, H.
Using magnetic neutron scattering we characterize an unusual low temperature phase in orthorhombic SrCuO2. The material contains zigzag spin ladders formed by pairs of S=1/2 chains (J=180 meV)...
Tuning the spin Hamiltonian of NENP by external pressure: a neutron scattering study (1997)
Zaliznyak, I. A., Dender, D. C., Broholm, C., Reich, Daniel H.
We report an inelastic neutron scattering study of antiferromagnetic spin dynamics in the Haldane chain compound Ni(C2H8N2)2NO2ClO4 (NENP) under external hydrostatic pressure P = 2.5 GPa. At ambient...
Static properties of a quasi one-dimensional antiferromagnet in magnetic field (1995)
Zhitomirsky, M. E., Zaliznyak, I. A.
We calculate the effect of zero-point fluctuations on the magnetostatic properties of a quasi one-dimensional antiferromagnetic helimagnet with and without in-plane anisotropy. We find substantial...