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- W2898871161 abstract "This thesis is broadly focused on the electrical transport study on topological thinfilms and nanowires with the fabrication of Bismuth Telluride (Bi₂Te₃) and optimizingelectrical contacts on them an integral part of the study. It was rather challenging to get an optimized electrical contacts on Bi₂Te₃ Nanowires without high contact resistance. We haveextensively discussed the problems and possible solutions to fabricate the device in thisthesis. The discussion starts with the chemical preparation of Nanowires followed by theoptimization of concentration and cleaning. In subsequent sessions a detailed descriptionof Chromium - Gold contact deception on nanowires has been discussed including measurementof resistance and current across the sample as a function of temperature and voltagerespectively. The rationale of the outcome led to the delineated work of contact optimization.The electrical transport of topological thin film Bi₁.₅Sb₀.₅Te₁.₇Se₁.₃(BSTS) has been performedin the first half of thesis. We have studied the electrical transport of two BSTS thinfilms. From the resistance measurement of this film we observed that a hump in resistanceclose to 200 K. We also studied the resistance fluctuations at this region of temperature andobserved the resistance and fluctuation behave oppositely as a function of temperatures.The noise temperature dependent as well as bias dependent noise data has been discussedin detail. Experiment was repeated in liquid helium temperature. Further propositions anda future direction of experiments have also been discussed and justified in this thesis." @default.
- W2898871161 created "2018-11-09" @default.
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- W2898871161 date "2017-04-01" @default.
- W2898871161 modified "2023-09-24" @default.
- W2898871161 title "Study of Electrical Transport in Topological Thin Films/Nanowires and Device Fabrication" @default.
- W2898871161 hasPublicationYear "2017" @default.
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