期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 90, 期 2, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.90.024709
关键词
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资金
- JSPS KAKENHI [JP15K17680, JP15H05854, JP18H01815, JP19H05826, JP19H00656]
The study found that the conductance of a quantum point contact on a GaAs/AlGaAs double quantum well is significantly influenced by the magnetic field in the region, resulting in a 17.5 times enhancement of the g-factor due to Zeeman energy. This phenomenon is mainly attributed to the low electron density and high mobility in the strong many-body interaction region.
In this study, we observe that the conductance of a quantum point contact on a GaAs/AlGaAs double quantum well depends significantly on the magnetic field perpendicular to the two-dimensional electron gas. In the presence of the magnetic field, the subband edge splitting due to the Zeeman energy reaches 0.09 meV at 0.16 T, thereby suggesting an enhanced g-factor. The estimated g-factor enhancement is 17.5 times that of the bare value. It is considered that a low electron density and high mobility makes it possible to reach a strong many-body interaction regime in which this type of strong enhancement in g-factor can be observed.
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