Title

Ballistic transport in a Cd3As2 nanowire Josephson junction device coupled to a superconducting LC circuit

Alternative Title

초전도 LC 회로에 결합된 Cd3As2 나노 와이어 Josephson 접합 소자에서의 탄도 전자 수송

DGIST Authors

Jisu Kim ; Jungpil Seo ; Minkyung Jung

Advisor

서정필

Co-Advisor(s)

Minkyung Jung

Issued Date

2025

Awarded Date

2025-02-01

Citation

Jisu Kim. (2025). Ballistic transport in a Cd3As2 nanowire Josephson junction device coupled to a superconducting LC circuit. doi: 10.22677/THESIS.200000841146

Type

Thesis

Description

Cd3As2 nanowire, Josephson junction, Superconducting LC circuit, Fabry-Perot interference, SuSchrieffer-Heeger chain

Table Of Contents

List of Contents
Abstract
List of contents
List of figures

Ⅰ. Introduction
1.1 Dirac semimetal 1
1.2 Cd3As2-Topological Dirac semimetal 3
1.3 Superconductor 4
1.4 Josephson junction 5
1.5 Superconducting LC circuit 7
1.5.1 Spiral LC circuit 7
1.5.2 Meander LC circuit 9
1.6 S-parameter in RF measurement 10
1.6.1 Wave reflection and transmission 11
1.6.2 Impedance matching 12
1.7 Su-Schrieffer-Heeger chain 13
1.8 Motivation and potential applications 25

Ⅱ. Design and Fabrication
2.1 Cd3As2 nanowire growth 27
2.2 Device design 27
2.3 Device fabrication 29
2.4 Measurement setup 31

Ⅲ. Experimental Results
3.1 Characteristic of Cd3As2 33
3.1.1 Device specifications 33

3.1.2 Conductance oscillation 35
3.1.3 Josephson junction 36
3.2 Superconducting LC circuit coupled to Cd3As2 nanowire 39
3.2.1 Gate tunable amplitude and resonant frequency 40
3.2.2 Sensitive RF measurement of detecting Fabry-Perot interference 43
3.3 Su-Schrieffer-Heeger LC chain 45

Ⅳ. Conclusion

URI

http://hdl.handle.net/20.500.11750/58062
http://dgist.dcollection.net/common/orgView/200000841146

DOI

10.22677/THESIS.200000841146

Degree

Master

Department

Department of Physics and Chemistry

Publisher

DGIST

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