Determination of the orbital polarization in YTiO3 by using soft X-ray linear dichroism.
Determination of the orbital polarization in YTiO3 by using soft X-ray linear dichroism.
复制标题
DOI：
10.1103/physrevlett.93.257207
复制
发表时间：
2004-12
影响因子：
8.6
通讯作者：
F. Iga;M. Tsubota;M. Sawada;Hong-bin Huang;Souichiro Kura;Masaki Takemura;K. Yaji;M. Nagira;A. Kimura;T. Jo;T. Takabatake;H. Namatame;M. Taniguchi;M. Taniguchi
中科院分区：
文献类型：
--
作者：
F. Iga;M. Tsubota;M. Sawada;Hong-bin Huang;Souichiro Kura;Masaki Takemura;K. Yaji;M. Nagira;A. Kimura;T. Jo;T. Takabatake;H. Namatame;M. Taniguchi;M. Taniguchi
我们报告测量的线性二向色性的X射线吸收在Ti L（2，3）边缘的莫特绝缘铁磁体YTiO 3，其中轨道有序发生在三重简并Ti 3dt（2g）状态。对于偏振方向平行于a、B和c轴的入射电场，得到了二向色谱及其积分强度。光谱与原子多重态计算的比较消除了关于轨道极化的模糊性，即，的相对权重|xy>，|yz>，以及|zx>轨道，这对铁磁性的起源至关重要。该结果与之前Mizokawa-Fujimori方案中核磁共振的分析一致。
We report measurements of linear dichroism in x-ray absorption at Ti L(2,3) edges of a Mott-insulating ferromagnet YTiO3, where orbital ordering occurs in the triply degenerate Ti 3d t(2g) states. Dichroic spectra and their integrated intensities are obtained for the incident electric field with polarizations parallel to a, b, and c axes. The comparison of the spectra with atomic multiplet calculations removes the ambiguity about the orbital polarization, i.e., the relative weights of |xy>, |yz>, and |zx> orbits, which are crucial for the origin of ferromagnetism. The result is consistent with the previous analysis of nuclear magnetic resonance in the Mizokawa-Fujimori scheme.