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Synthesis and applications of magnetic van der Waals material: Transition metal phosphorus tri-chalcogenides : 자기 반데르발스 물질인 전이금속 삼황화린의 합성과 응용
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 박제근 | - |
dc.contributor.author | 이성민 | - |
dc.date.accessioned | 2018-12-03T01:53:05Z | - |
dc.date.available | 2020-10-06T07:25:55Z | - |
dc.date.issued | 2018-08 | - |
dc.identifier.other | 000000151831 | - |
dc.identifier.uri | https://hdl.handle.net/10371/144150 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 자연과학대학 물리·천문학부(물리학전공), 2018. 8. 박제근. | - |
dc.description.abstract | Among van der Waals materials which have a layered structure and a weak van der Waals interaction between the layers, the magnetic transition metal phosphorus tri-chalcogenides (TMPX3) were studied. Especially, the exfoliated flakes of TMPX3 were obtained by mechanical exfoliation on various substrates and studied as a form of tunnel junction using the vertical transport measurement.
I studied tunneling transport properties of several exfoliated MnPS3 flakes with thickness varying from monolayer to a few tens of layers. To measure current through the ultrathin nanostructures, conductive atomic force microscopy was the instrument of choice. Using the results, I estimated several key parameters of MnPS3 down to the monolayer such as tunneling barrier height and dielectric breakdown strength. In addition, the first vdW heterostructure with few-layers of NiPS3 was realized by dry transfer technique using the new polymer called polycaprolactone. I performed vertical transport measurements in this system and successfully observed semiconducting behavior with the key features of a Schottky junction. I expect that these results will prove helpful for further research on magnetism and spintronics in vdW systems. | - |
dc.description.tableofcontents | 1. Introduction 1
1.1 van der Waals materials and their magnetism 1.2 Outline of thesis 2. Experimental techniques 5 2.1 Sample preparation 2.1.1 Chemical vapor transport 2.1.2 Mechanical exfoliation 2.2 Transport in van der Waals materials 2.2.1 Atomic force microscopy 2.2.2 E-beam lithography 3. Tunneling transport of mono and few-layer magnetic van der Waals MnPS3 11 3.1 Tunnel junctions using van der Waals insulator MnPS3 3.2 Experimental details 3.3 Results and analysis 4. van der Waals heterostructures based on TMPX3 for forming antiferromagnetic tunnel junctions using dry transfer technique 19 4.1 Magnetic tunnel junctions using vdW heterostructures 4.2 Dry transfer using PCL-based PDMS stamp 4.3 Experimental details 4.4 Results and analysis 5. Conclusion 27 5.1 Summary 5.2 Outlook Appendix 29 References 33 국문초록 37 Acknowledgements 39 | - |
dc.format | application/pdf | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject.ddc | 523.01 | - |
dc.title | Synthesis and applications of magnetic van der Waals material: Transition metal phosphorus tri-chalcogenides | - |
dc.title.alternative | 자기 반데르발스 물질인 전이금속 삼황화린의 합성과 응용 | - |
dc.type | Thesis | - |
dc.description.degree | Master | - |
dc.contributor.affiliation | 자연과학대학 물리·천문학부(물리학전공) | - |
dc.date.awarded | 2018-08 | - |
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