First observation of nonreciprocal X-Ray gyrotropy
We report the first observation of a nonreciprocal x-ray linear dichroism caused by the time-reversal odd, real part zeta of the complex gyrotropy tensor zeta(*) which is dominated by electric dipole-electric quadrupole E1E2 interference terms. A nonreciprocal transverse anisotropy was observed in the low temperature insulating phase of a Cr doped V2O3 Mott crystal when a single antiferromagnetic domain was grown by magnetoelectric annealing along the hexagonal c axis. This new element (edge) specific spectroscopy could nicely complement x-ray magnetic circular dichroism which is silent for antiferromagnetic materials.
Goulon
J
European Synchrotron Radiation Facility (ESRF), Boite Postale 220, 38043 Grenoble Cedex, France.
Rogalev
A
Goulon-Ginet
C
Benayoun
G
Paolasini
L
Brouder
C
Malgrange
C
Metcalf
PA