Električno krmiljenje metastabilnih stanj v 1\textit{T}-TaS$_2$ in EuTe$_4$

Lipič, Jan (author), Mihailović, Dragan (mentor), Venturini, Rok (comentor)

Metastabilna stanja so stanja, ki so stabilna (na določeni časovni skali), vendar ne predstavljajo globalnega energijskega minimuma sistema. Leta 2014 je bil prvič izveden kontroliran preklop v elektronsko metastabilno stanje v 1\textit{T}-TaS$_2$, kar je odprlo vrata do preučevanja nove fizike in predstavilo pot do aplikativne uporabe. V tej magistrski nalogi bom predstavil kontrolo metastabilnih elektronskih stanj v materialih 1\textit{T}-TaS$_2$ in EuTe$_4$. V prvem delu naloge bom preučil vpliv substrata iz aluminija 7075 na temperaturno stabilnost metastabilnega stanja 1\textit{T}-TaS$_2$ in pokazal stabilnost pri višji temperaturi, kot doseženo s standardnimi substrati. V drugem delu naloge bom predstavil meritve na novem materialu EuTe$_4$, kjer pokažem nadzorovan preklop v dolgoživo metastabilno elektronsko stanje pri sobni temperaturi!

• Language: Slovenian
• Keywords: metastabilno stanje, val gostote naboja, 1\textit{T}-TaS$_2$, EuTe$_4$, skrito stanje, električni preklop, moiré-jeva super-struktura
• Work type: Master's thesis/paper
• Organization: FMF - Faculty of Mathematics and Physics
• Year: 2026
• PID: 20.500.12556/RUL-187747
• Publication date in RUL: 13.09.2026

Secondary language

• Language: English
• Title: Electrical Manipulation of Metastable States in 1\textit{T}-TaS$_2$ and EuTe$_4$

Abstract

Metastable states are states that are stable (on a certain time scale) but do not represent the global energy minimum of the system. In 2014, the first controlled transition to an electronic metastable state was achieved in 1\textit{T}-TaS$_2$, which opened the door to the study of new physics and presented a path to practical applications. In this master’s thesis, I will present the control of metastable electronic states in the materials 1\textit{T}-TaS$_2$ and EuTe$_4$. In the first part of the thesis, I will examine the effect of an aluminum 7075 substrate on the temperature stability of the metastable state in 1\textit{T}-TaS$_2$ and demonstrate stability at a higher temperature than that achieved with standard substrates. In the second part of the thesis, I will present measurements on the new material EuTe$_4$, where I will demonstrate a controlled transition to a long-lived metastable electronic state at room temperature!

• Keywords: metastable state, charge density wave, 1\textit{T}-TaS$_2$, EuTe$_4$, hidden state, electrical switch, moiré super-structure