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Correlation effects in transport through quantum dot systems
Kacper Wrześniewski
Abstract
The PhD thesis concerns theoretical studies of charge and spin transport through the systems consisting of coupled quantum dots attached to external leads. The considered structures exhibit many interesting physical properties, not observed in bulk materials, resulting from various quantum effects and correlations, as well as different geometrical arrangements. The focus of this dissertation is on various correlation effects and their influence on transport through quantum dot systems. In particular, the quantum interference effects in triangular quantum dots responsible for the appearance of dark states are extensively studied. Moreover, an important class of considered systems are quantum dot based Cooper pair splitters. The proximity of superconductor induces pairing correlations in quantum dots and gives rise to the formation of Andreev bound states for energies smaller than the superconducting energy gap. The Andreev transport is analyzed with an emphasis on the current cross-correlations in order to optimize the parameters for obtaining high Cooper pair splitting efficiency.- Record ID
- UAM7dfb9a99906a4135b6b30107ea17461f
- Diploma type
- Doctor of Philosophy
- Author
- Kacper Wrześniewski (SNŚ/WyF/FoP) Kacper Wrześniewski
- Title in Polish
- Efekty korelacji w transporcie przez układy kropek kwantowych
- Title in English
- Correlation effects in transport through quantum dot systems
- Language
- en English
- Certifying Unit
- Faculty of Physics (SNŚ/WyF/FoP)
- Discipline
- physics / (physical sciences domain) / (physical sciences)
- Scientific discipline (2.0)
- Defense Date
- 05-11-2018
- Title date
- 05-11-2018
- Supervisor
- URL
- http://hdl.handle.net/10593/24098 opening in a new tab
- Keywords in English
- quantum dots, quantum transport, dark states, Cooper pair splitters
- Abstract in English
- The PhD thesis concerns theoretical studies of charge and spin transport through the systems consisting of coupled quantum dots attached to external leads. The considered structures exhibit many interesting physical properties, not observed in bulk materials, resulting from various quantum effects and correlations, as well as different geometrical arrangements. The focus of this dissertation is on various correlation effects and their influence on transport through quantum dot systems. In particular, the quantum interference effects in triangular quantum dots responsible for the appearance of dark states are extensively studied. Moreover, an important class of considered systems are quantum dot based Cooper pair splitters. The proximity of superconductor induces pairing correlations in quantum dots and gives rise to the formation of Andreev bound states for energies smaller than the superconducting energy gap. The Andreev transport is analyzed with an emphasis on the current cross-correlations in order to optimize the parameters for obtaining high Cooper pair splitting efficiency.
- Thesis file
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- File: 1
- Correlation effects in transport through quantum dot systems, File Wrzesniewski_PhD_thesis.pdf / 17 MB
- Wrzesniewski_PhD_thesis.pdf
- publication date: 02-01-2020
- Correlation effects in transport through quantum dot systems, File Wrzesniewski_PhD_thesis.pdf / 17 MB
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- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/phd/UAM7dfb9a99906a4135b6b30107ea17461f/