Low-Temperature Structure of the Quarter-Filled Ladder Compound α'-NaV2O5
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چکیده
منابع مشابه
0 Effective Charge and Spin Hamiltonian for the Quarter - Filled Ladder Compound α ′ - NaV 2 O 5
An effective intra-and inter-ladder charge-spin hamiltonian for the quarter-filled ladder compound α ′-NaV 2 O 5 has been derived by using the standard canonical transformation method. In the derivation, it is clear that a finite inter-site Coulomb repulsion is needed to get a meaningful result otherwise the perturbation becomes ill-defined. Various limiting cases depending on the values of the...
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A theory of superexchange in the mixed valent layer compound NaV2O5 is presented which provides a consistent description of exchange both in the disordered and charge ordered state. Starting from results of band structure calculations for NaV2O5 first an underlying electronic model for a ladder unit in the Trellis lattice is formulated. By using the molecular orbital representation for intra-ru...
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We have used a combination of neutron resonant spin-echo and triple-axis spectroscopies to determine the energy, fine structure, and linewidth of the magnon resonance in the model spin-1/2 ladder antiferromagnet IPA-CuCl(3) at temperatures T≪Δ(0)/k(B), where Δ(0) is the spin gap at T=0. In this low-temperature regime we find that the results deviate substantially from the predictions of the non...
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In the (ab) polarized Raman scattering spectra of NaV2O5 single crystals, measured with 647.1 nm laser line at T < Tc, we found two modes at 86, and 126 cm not previously reported. These two modes, together with 66, and 106 cm modes, make an array of four low-energy equidistant modes below the energy onset of the continuum at about 132 cm. All four modes are strongly suppressed by increasing Na...
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ژورنال
عنوان ژورنال: Journal of the Physical Society of Japan
سال: 2002
ISSN: 0031-9015,1347-4073
DOI: 10.1143/jpsj.71.385