Individually experimental demonstration of Aharonov-Bohm and Altshuler-Aronov-Spivak oscillations in different probe configurations in the BiSbTe3 topological insulator macroflake

Autor: Sheng-Yu You, 游勝宇
Rok vydání: 2019
Druh dokumentu: 學位論文 ; thesis
Popis: 107
We report the Aharonov-Bohm (AB) oscillation and Altshuler-Aronov-Spivak (AAS) oscillations in the BiSbTe3 topological insulator macroflake. It reveals Aharonov-Bohm (AB) and Altshuler-Aronov-Spivak (AAS) oscillations in the local and non-local measurement, respectively. The oscillation period in the local measurement (AB) are double of that in the non-local measurement (AAS).The AB oscillation period is 0.21 T and the related loop diameter is 156 nm which is consistent with the reported phase coherence length in topological insulators. The Shubnikov-de Haas oscillation frequency is the same but oscillation peaks reveals a π phase shift in the local and non-local measurement. The Berry phase is π in the local measurement and 0 in non-local measurement.
Databáze: Networked Digital Library of Theses & Dissertations
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