Halder O, Satpati B, Rajput P, Mohapatra N, Jha S N, Suffczyński J, Pacuski W, Rath S
School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Jatni, 752 050, Khurda, India.
Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata, 700 064, India.
Sci Rep. 2019 Feb 12;9(1):1804. doi: 10.1038/s41598-019-38974-0.
The layered nanosheets exhibit a variety of physical and optical properties originating from amalgamation of intra- and inter- layer electronic interactions, which makes them promising materials for advanced devices with varsatile controlling channels. In particular, the dilute magnetic semiconductor multilayered nanosheets have promising optical, electrical and magnetic properties that have been less explored so far. Here, the spin permissible optical properties from solvothermally grown Mn doped CdSe (thickness ~2.26 nm) multilayered nanosheets are reported on. The presence of multi-phase magnetic orderings with a sharp ferromagnetic transition at temperature ~48 K pertinent to the stabilization and co-existence of Mn and Mn based local phases have been observed from the (Cd,Mn)Se layered nanosheets corroborating to the x-ray absorption near edge structure, electron paramagnetic resonance, Raman scattering and magnetic measurements. The optical absorption and photoluminescence (PL) studies at room temperature affirm wide array of optical properties in the visible regime corresponding to the band edge and intriguing dopant-phase mediated spin approved transitions. The circularly polarized magneto-PL and life time analysis exhibits the spin-polarized fast radiative transitions confirming the presence of spin-active electronic states.
层状纳米片展现出源自层内和层间电子相互作用融合的多种物理和光学性质，这使其成为具有多种控制通道的先进器件的有前途材料。特别是，稀磁半导体多层纳米片具有迄今较少被探索的有前途的光学、电学和磁学性质。在此，报道了溶剂热生长的锰掺杂硒化镉（厚度约2.26纳米）多层纳米片的自旋允许光学性质。从（镉，锰）硒层状纳米片中观察到多相磁有序的存在，在约48K温度下有尖锐的铁磁转变，这与锰和基于锰的局部相的稳定和共存相关，这与X射线吸收近边结构、电子顺磁共振、拉曼散射和磁性测量结果相佐证。室温下的光吸收和光致发光（PL）研究证实了在可见光范围内对应于带边和有趣的掺杂剂 - 相介导的自旋允许跃迁的广泛光学性质。圆偏振磁光致发光和寿命分析显示出自旋极化的快速辐射跃迁，证实了自旋活性电子态的存在。
