magistrsko delo
Matevž Rupnik (Author), Dragan Mihailović (Mentor), Rok Venturini (Co-mentor)

Abstract

V tej magistrski nalogi so raziskani vplivi substrata in litografskih postopkov na vzorce 1T-TaS$_2$, ki je znan po svojem bogatem faznem diagramu z več fazami vala gostote naboja in skritim metastabilnim stanjem. Preučili smo, kako različne metode izdelave vplivajo na lastnosti vzorcev, z namenom zmanjšanja neželenih učinkov, povezanih z izdelavo. Poleg tega smo predstavili alternativne metode priprave vzorcev 1T-TaS$_2$, ki omogočajo, da so transportne lastnosti materiala izražene brez dodatnih modifikacij zaradi načina izdelave. Z izboljšanimi tehnikami izdelave smo analizirali obnašanje materiala 1T-TaS$_2$ ob zmanjšanju debeline vzorca in ugotovili, ali so rezultati skladni s prejšnjimi opažanji. Poleg tega smo preučevali, kako isti dejavniki vplivajo na skrito metastabilno stanje. Bolj stabilno metastabilno stanje ima pomembne praktične implikacije, saj bi tako 1T-TaS$_2$ lahko bil bližje praktični uporabi, na primer kot memristor.

Keywords

fizika trdne snovi;tantalov disulfid;val gostote naboja;metastabilno stanje;litografija;prosto stoječi vzorci;memristor;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FMF - Faculty of Mathematics and Physics
Publisher: [M. Rupnik]
UDC: 538.9
COBISS: 207496451 Link will open in a new window
Views: 46
Downloads: 14
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Other data

Secondary language: English
Secondary title: Fabrication of advanced 1T-TaS$_2$ electronic devices
Secondary abstract: This master's thesis explores the effects of substrates and lithographic processes on 1T-TaS$_2$ samples, known for their complex phase diagram with multiple charge density wave phases and a hidden metastable state. We investigated how different fabrication methods influence sample properties, aiming to reduce unwanted effects arising from the fabrication process. Furthermore, we introduced alternative preparation methods for 1T-TaS$_2$ samples, ensuring that the material's transport properties are showcased without additional modifications due to the fabrication technique. With these improved methods, we analyzed how 1T-TaS$_2$ behaves when reducing sample thickness and whether the outcomes align with previous findings. Additionally, we examined how same factor aslo impact the hidden metastable state. A more stable metastable state could have substantial practical implications, potentially bringing 1T-TaS$_2$ closer to practical uses, such as in memristors.
Secondary keywords: solid state physics;tantalum disulfide;charge density wave;metastable state;lithography;free-standing samples;memristor;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Fak. za matematiko in fiziko, Oddelek za fiziko
Pages: 53 str.
ID: 25050661