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    Itinerant magnetic excitations in antiferromagnetic CaFe2As2 

    Diallo, S. O.; Antropov, V. P.; Perring, T.G.; Broholm, C.; Pulikkotil, J. J.; Ni, N.; Bud'ko, S.L.; Canfield, P.C.; Kreyssig, A.; Goldman, A. I.; McQueeney, R. J. (American Physical Society, 2009-05-08)
    Neutron scattering measurements of the magnetic excitations in single crystals of antiferromagnetic CaFe2As2 reveal steeply dispersive and well-defined spin waves up to an energy of ~100 meV. Magnetic excitations above 100 ...
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    S=½ chain in a staggered field: high-energy bound-spinon state and the effects of a discrete lattice 

    Kenzelmann, M.; Batista, C. D.; Chen, Y.; Broholm, C.; Reich, D.H.; Park, S.; Qiu, Y. (American Physical Society, 2005-03-01)
    We report an experimental and theoretical study of the antiferromagnetic S=½ chain subject to uniform and staggered fields. Using inelastic neutron scattering, we observe a bound-spinon state at high energies in the linear ...
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    Spinons in the strongly correlated copper oxide chains in SrCuO2 

    Broholm, C.; Perring, T.G.; Takagi, H.; Frost, C. D.; Zaliznyak, L.A.; Woo, H. (American Physical Society, 2004-08-20)
    We have investigated the spin dynamics in the strongly correlated chain copper oxide SrCuO2 for energies up to ≥0.6 eV using inelastic neutron scattering. We observe a gapless continuum of magnetic excitations, which is ...
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    Broken parity and a chiral ground state in the frustrated magnet CdCr2O4 

    Chern, Gia-Wei; Fennie, C. J.; Tchernyshyov, Oleg (American Physical Society, 2006-08-01)
    We present a model describing the lattice distortion and incommensurate magnetic order in the spinel CdCr2O4, a good realization of the Heisenberg 'pyrochlore' antiferromagnet. The magnetic frustration is relieved through ...
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    Phase diagram and spin Hamiltonian of weakly-coupled anisotropic S=½ chains in CuCl2·2((CD3)2SO) 

    Chen, Y.; Stone, M. B.; Kenzelmann, M.; Batista, C. D.; Reich, D.H.; Broholm, C. (American Physical Society, 2007-06-01)
    Field-dependent specific heat and neutron scattering measurements were used to explore the antiferromagnetic S=½ chain compound CuCl2·2((CD3)2SO). At zero field the system acquires magnetic long-range order below TN=0.93 ...
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    Ising phases of Heisenberg ladders in a magnetic field 

    Penc, Karlo; Fouet, Jean-Baptiste; Miyahara, Shin; Tchernyshyov, Oleg; Mila, Frédéric (American Physical Society, 2007-09-14)
    We show that Dzyaloshinskii-Moriya (DM) interactions can substantially modify the phase diagram of spin-1/2 Heisenberg ladders in a magnetic field provided they compete with exchange. For nonfrustrated ladders, they induce ...

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    AuthorBroholm, C. (4)Batista, C. D. (2)Chen, Y. (2)Kenzelmann, M. (2)Perring, T.G. (2)Reich, D.H. (2)Tchernyshyov, Oleg (2)Antropov, V. P. (1)Bud'ko, S.L. (1)Canfield, P.C. (1)... View MoreSubject
    Heisenberg model (6)
    antiferromagnetic materials (5)neutron scattering (4)copper compounds (2)magnetic moments (2)spin dynamics (2)ab initio calculations (1)antiferromagnetic Heisenberg spin chain (1)band model of magnetism (1)bound-spinon state (1)... View MoreDate Issued2007 (2)2004 (1)2005 (1)2006 (1)2009 (1)Has File(s)Yes (6)

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