https://scholars.lib.ntu.edu.tw/handle/123456789/428005
標題: | Effective g factor of low-density two-dimensional holes in a Ge quantum well | 作者: | T. M. Lu C. T. Harris S. –H. Huang Y. Chuang JIUN-YUN LI CHEE-WEE LIU |
公開日期: | 2017 | 卷: | 111 | 期: | 10 | 起(迄)頁: | 107-112 | 來源出版物: | Applied Physics Letters | 摘要: | We report the measurements of the effective g factor of low-density two-dimensional holes in a Ge quantum well. Using the temperature dependence of the Shubnikov-de Haas oscillations, we extract the effective g factor in a magnetic field perpendicular to the sample surface. Very large values of the effective g factor, ranging from ∼13 to ∼28, are observed in the density range of 1.4×1010 cm-2- 1.4×1011 cm-2. When the magnetic field is oriented parallel to the sample surface, the effective g factor is obtained from a protrusion in the magneto-resistance data that signify full spin polarization. In the latter orientation, a small effective g factor, ∼1.3-1.4, is measured in the density range of 1.5×1010 cm-2- 2×1010 cm-2. This very strong anisotropy is consistent with theoretical predictions and previous measurements in other 2D hole systems, such as InGaAs and GaSb. © 2017 Author(s). |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/428005 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029286339&doi=10.1063%2f1.4990569&partnerID=40&md5=b407ceeed58cffeaffe945ec862d8533 |
ISSN: | 36951 | DOI: | 10.1063/1.4990569 | SDG/關鍵字: | Gallium alloys; Germanium; Indium alloys; Magnetic fields; Spin polarization; Temperature distribution; Density range; Effective g-factor; Ge quantum well; Measurements of; Sample surface; Shubnikov de-Haas oscillation; Strong anisotropy; Temperature dependence; Semiconductor quantum wells |
顯示於: | 電機工程學系 |
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