Giant Zeeman effects in colloidal diluted magnetic semiconductor quantum dots with homogeneous dopant speciation

Nick S. Norberg; Daniel R. Gamelin

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Giant Zeeman effects in colloidal diluted magnetic semiconductor quantum dots with homogeneous dopant speciation

机译：具有均质掺杂剂形态的胶态稀释磁半导体量子点中的巨型塞曼效应

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Ligand field electronic absorption and magnetic circular dichroism (MCD) spectroscopies are used to probe Co~(2+) dopant speciation in ZnO, ZnSe, and CdS nanocrystals and confirm the high quality of these colloidal diluted magnetic semiconductor quantum dots (DMS-QDs). Measurements of the QD giant Zeeman splittings using MCD and Zeeman spectroscopies show no enhancement of N_0(α-β) relative to bulk. MCD spectroscopy is also presented as an effective method for verifying the successful synthesis of colloidal DMS-QDs when doping cannot be confirmed by ligand field absorption, highly resolved electron paramagnetic resonance, or other rigorous dopant-specific spectroscopic means.

机译：配体场电子吸收和磁性圆二色性（MCD）光谱用于探测ZnO，ZnSe和CdS纳米晶体中的Co〜（2+）掺杂物形态，并确认这些胶体稀释的磁性半导体量子点（DMS-QDs）的高质量。使用MCD和Zeeman光谱仪对QD巨型Zeeman分裂的测量显示，相对于体积，N_0（α-β）的含量没有增强。当不能通过配体场吸收，高度分辨的电子顺磁共振或其他严格的掺杂剂特异性光谱方法确认掺杂时，MCD光谱法也可作为验证胶体DMS-QD成功合成的有效方法。

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来源
《Journal of Applied Physics》 |2006年第8pt3期|p.08M104.1-08M104.3|共3页
作者
Nick S. Norberg; Daniel R. Gamelin;
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作者单位

Department of Chemistry, University of Washington, Seattle, Washington 98195-1700;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类应用物理学;计量学;
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Giant Zeeman effects in colloidal diluted magnetic semiconductor quantum dots with homogeneous dopant speciation

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