First observation of nonreciprocal X-Ray gyrotropy
First observation of nonreciprocal X-Ray gyrotropy
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首次观察到不可逆 X 射线回旋现象
DOI：
10.1103/physrevlett.85.4385
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发表时间：
2000
影响因子：
8.6
通讯作者：
Metcalf
中科院分区：
文献类型：
--
作者：
Goulon;Rogalev;Goulon;Benayoun;Paolasini;Brouder;Malgrange;Metcalf
我们报告的第一个观察到的非互易的X射线线性二向色性所造成的时间反演奇数，真实的部分zeta的复回旋张量zeta（*），这是占主导地位的电偶极-电四极E1 E2干涉条款。通过磁电退火沿着六方c轴生长单一反铁磁畴，在Cr掺杂V2 O3 Mott晶体的低温绝缘相中观察到非互易横向各向异性.这种新的元素（边缘）特定的光谱可以很好地补充x射线磁性圆二色性，这是沉默的反铁磁材料。
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.