TY - JOUR

T1 - Momentum-dependent light scattering in a two-dimensional Heisenberg antiferromagnet

T2 - Analysis of x-ray scattering data

AU - Donkov, A.

AU - Chubukov, A. V.

PY - 2007

Y1 - 2007

N2 - Motivated by the achievements of the x-ray scattering technique, we analyzed the profile of the light scattering cross section R (q,ω) at a finite q in a 2D Heisenberg antiferromagnet. Previous Raman scattering studies at q=0 identified the two-magnon peak in B1g scattering geometry. We found that the B1g peak disperses downwards at a finite q, and its cross section increases, reaching its maximum at q= q0 = (0,π) and symmetry related points. In addition, the cross-section in the A1g geometry becomes nonzero at a finite q, and also displays a two-magnon peak which gains strength and disperses to larger frequencies with increasing q, and reaches its highest cross section at q0. We found that the profile of R (q0, ω) is equivalent in A1g and B1g geometries.

AB - Motivated by the achievements of the x-ray scattering technique, we analyzed the profile of the light scattering cross section R (q,ω) at a finite q in a 2D Heisenberg antiferromagnet. Previous Raman scattering studies at q=0 identified the two-magnon peak in B1g scattering geometry. We found that the B1g peak disperses downwards at a finite q, and its cross section increases, reaching its maximum at q= q0 = (0,π) and symmetry related points. In addition, the cross-section in the A1g geometry becomes nonzero at a finite q, and also displays a two-magnon peak which gains strength and disperses to larger frequencies with increasing q, and reaches its highest cross section at q0. We found that the profile of R (q0, ω) is equivalent in A1g and B1g geometries.

UR - http://www.scopus.com/inward/record.url?scp=33846459083&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846459083&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.75.024417

DO - 10.1103/PhysRevB.75.024417

M3 - Article

AN - SCOPUS:33846459083

SN - 1098-0121

VL - 75

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 2

M1 - 024417

ER -