Quantum Hall effect in 2 dimensional GaInAs structure
Data(s) |
30/05/2013
30/05/2013
2013
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Resumo |
Transport properties of GaAs / δ – Mn / GaAs / InxGa1-xAs / GaAs structure with Mn δ – layer, which is separated from InxGa1-xAs quantum well (QW) by 3 nm thick GaAs spacer was investigated. This structure with high mobility was characterized by X-ray difractometry and reflectometry. Transport and electrical properties of the structure were measured by using Pulsed Magnetic Field System (PMFS). During investigation of the Shubnikov – de Haas and the Hall effects the main parameters of QW structure such as cyclotron mass, Fermi level, g – factor, Dingle temperature and concentration of holes were estimated. Obtained results show high quality of the prepared structure. However, anomalous Hall effect at temperatures 2.09 K, 3 K, 4.2 K is not clearly observed. Attempts to identify magnetic moment were made. For this purpose the polarity of the filed was changed to the opposite at each shot. As a result hysteresis loop was not observed in the magnetic field dependences of the anomalous Hall resistivity.This can be attributed to the imperfection of the experimental setup. |
Identificador |
http://www.doria.fi/handle/10024/90619 URN:NBN:fi-fe201305283757 |
Idioma(s) |
en |
Palavras-Chave | #transport properties #2 dimensional structure #quantum well #magnetoresistance #the quantum Hall effect #the anomalous Hall effect #Shubnikov – de Haas oscillations |
Tipo |
Master's thesis Diplomityö |