Dynamic probes of quantum spin chains with the Dzyaloshinskii-Moriya interaction

Details Dynamic probes of quantum spin chains with the Dzyaloshinskii-Moriya interaction Dynamic probes of quantum spin chains with the Dzyaloshinskii-Moriya interaction

2007-12-20

arxiv.org/abs/0712.3361v1

Phys. Rev. B 73, 214407 (2006) (14 pages)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.73.214407

We consider the spin-1/2 anisotropic XY chain in a transverse (z) field with the Dzyaloshinskii-Moriya interaction directed along z-axis in spin space to examine the effect of the Dzyaloshinskii-Moriya interaction on the zz, xx and yy dynamic structure factors. Using the Jordan-Wigner fermionization approach we analytically calculate the dynamic transverse spin structure factor. It is governed by a two-fermion excitation continuum. We analyze the effect of the Dzyaloshinskii-Moriya interaction on the two-fermion excitation continuum. Other dynamic structure factors which are governed by many-fermion excitations are calculated numerically. We discuss how the Dzyaloshinskii-Moriya interaction manifests itself in the dynamic properties of the quantum spin chain at various fields and temperatures.

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