20.500.12556/RUL-173235 Primerjava skritega stanja vala gostote naboja v tantalovem disulfidu pri različnem zunanjem vzbujanju Comparison of the hidden charge density wave state of tantalum disulfide after different external stimuli V tej magistrski nalogi proučujem posebno skrito stanje vala gostote naboja v 1T-$\mathrm{TaS}_2$ . To skrito stanje je metastabilno, kar pomeni, da se v snovi ne pojavi pri ohlajanju ali segrevanju, temveč ga je mogoče ustvariti z laserskimi pulzi ali napetostnimi pulzi s pomočjo vrstičnega tunelskega mikroskopa. Z VTM sem posnel podrobne slike površine materiala po ustvaritvi skritega stanja pri različnih temperaturah. Pri nizkih temperaturah sem preučeval, kako se skrito stanje oblikuje in kakšna je njegova struktura. Pri višjih temperaturah sem opazoval relaksacijo stanja. Analiziral sem tudi, kako sta velikost in število domen v skritem stanju odvisna od jakosti napetostnega pulza. Rezultati nam pomagajo bolje razumeti, kako se skrito stanje oblikuje in sprošča. To bi lahko bilo koristno v bodočih tehnologijah, ki potrebujejo hitre in stabilne načine za shranjevanje informacij. In this thesis, I study a special state of matter called the hidden charge density wave (CDW) state in 1T-$\mathrm{TaS}_2$ . This hidden state is metastable, meaning it does not occur naturally when cooling down or heating up, but can be created using short laser pulses or voltage pulses from a scanning tunneling microscope. I used the STM to take detailed images of the material’s surface after creating the hidden state at different temperatures. At low temperatures, I looked at how the hidden state forms and what its structure looks like. At higher temperatures, I observed how this state slowly disappears over time. I also analyzed how the size and number of domains in the hidden state depend on the strength of the voltage pulse. The results help us better understand how the hidden state forms and relaxes. This could be useful in future technologies that need fast and stable ways to store or switch information. 1T-$\mathrm{TaS}_2$ val gostote naboja skrito stanje vrstična tunelska mikroskopija metastabilno stanje domenske stene relaksacijska dinamika ultrahitro vzbujanje 1T-$\mathrm{TaS}_2$ charge density wave hidden state scanning tunneling microscopy metastable state domain walls relaxation dynamics ultrafast excitation true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-09-14 08:16:04 2025-09-14 08:16:10 2025-11-07 03:41:03 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 153391 249164035 19522.pdf 19522.pdf 1 059E64C56632AD71824D42367BBD41AC ab802af1864fc2e94aa6c7846ef8fe0cc5f05fbc485cdf8fd8a7bdfaf0c6ddd0 24f22d6c-9132-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=217428 Fakulteta za matematiko in fiziko 0 0 0