Mesoscopic Stripes in Antiferromagnetic Fe Chalcogenide Probed by Scanning Photoelectron Spectromicroscopy
Mesoscopic Stripes in Antiferromagnetic Fe Chalcogenide Probed by Scanning Photoelectron Spectromicroscopy
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DOI：
10.7566/jpsj.85.033702
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发表时间：
2016-03-15
影响因子：
1.7
通讯作者：
Saini, Naurang L.
中科院分区：
文献类型：
--
作者：
Mizokawa, Takashi;Bendele, Markus;Saini, Naurang L.
我们对 Fe1+delta Te (delta = 0.09) 的顺磁 (PM) 和反铁磁 (AFM) 相进行了扫描光电子能谱显微镜测量。光谱显微镜图像揭示了低温下 AFM 单斜相中电子结构的条纹调制，而这种调制在高温下 PM 相中消失。这些条纹沿着单斜晶轴延伸，其特征是伽马点周围和费米能级 (E-F) 附近的态密度不同。由于 Fe1+δ Te 中 Gamma 点附近的近 E-F 电子态具有强电子晶格耦合，因此观察到的条纹可能与单斜晶格畸变引入的应变调制有关。
We have performed scanning photoelectron spectromicroscopy measurements in the paramagnetic (PM) and the antiferromagnetic (AFM) phases of Fe1+delta Te (delta = 0.09). The spectromicroscopy images reveal stripe modulation of the electronic structure in the AFM monoclinic phase at low temperature, that disappears at high temperature in the PM phase. The stripes, running along the monoclinic crystal axis, are characterized by different density of states around the Gamma point and near the Fermi level (E-F). Since the near E-F electronic states around the Gamma point have strong electron-lattice coupling in Fe1+delta Te, the observed stripes are likely to be related to the strain modulation introduced by the monoclinic lattice distortion.