Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja

Dominko, Damir

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doctoral thesis

Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja

Zagreb: University of Zagreb, Faculty of Science, 2012. urn:nbn:hr:217:472492

Dominko, Damir

University of Zagreb
Faculty of Science
Department of Physics

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APA 6th Edition

Dominko, D. (2012). Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:472492

MLA 8th Edition

Dominko, Damir. "Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja." Doctoral thesis, University of Zagreb, Faculty of Science, 2012. https://urn.nsk.hr/urn:nbn:hr:217:472492

Chicago 17th Edition

Dominko, Damir. "Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja." Doctoral thesis, University of Zagreb, Faculty of Science, 2012. https://urn.nsk.hr/urn:nbn:hr:217:472492

Harvard

Dominko, D. (2012). 'Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja', Doctoral thesis, University of Zagreb, Faculty of Science, accessed 19 April 2024, https://urn.nsk.hr/urn:nbn:hr:217:472492

Vancouver

Dominko D. Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Science; 2012 [cited 2024 April 19] Available at: https://urn.nsk.hr/urn:nbn:hr:217:472492

IEEE

D. Dominko, "Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja", Doctoral thesis, University of Zagreb, Faculty of Science, Zagreb, 2012. Available at: https://urn.nsk.hr/urn:nbn:hr:217:472492

Cite this item: https://urn.nsk.hr/urn:nbn:hr:217:472492

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Metadata

Title	Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja
Title (english)	Influence of crystal defects on phase excitations in charge density waves
Author	Damir Dominko
Mentor	Damir Starešinić (mentor)
Committee member	Slaven Barišić (predsjednik povjerenstva)
Committee member	Damir Starešinić (član povjerenstva)
Committee member	Silvia Tomić (član povjerenstva)
Committee member	Ivo Batistić (član povjerenstva)
Committee member	Mario Basletić (član povjerenstva)
Granter	University of Zagreb Faculty of Science (Department of Physics) Zagreb
Defense date and country	2012-09-25, Croatia
Scientific / art field, discipline and subdiscipline	NATURAL SCIENCES Physics
Universal decimal classification (UDC)	53 - Physics
Abstract	U ovoj disertaciji izučavan je utjecaj defekata na prijelaz u stanje vala gustoće naboja (VGN) i svojstva niskoenergetskih pobuđenja faze VGN-a, u ozračenim i dopiranim uzorcima VGN sistema o-TaS3. Smrzavanje fazne dinamike na temperaturi TG, kao dio složenih svojstva niskoenergetskih pobuđenja u VGN sistemima, posljedica je vezanja VGN-a sa defektima i slobodnim nosiocima naboja. Predloženi kriterij smrzavanja1, prema kojem je TG određena brojem slobodnih nosilaca naboja u domeni korelacije faze VGN-a je, kao glavni motiv istraživanja, u ovoj disertaciji potvrđen na uzorcima sa širokim rasponom udjela defekata. Transportna i dielektrična mjerenja, u širokom temperaturnom, naponskom i frekventnom području, pokazuju da defekti uzrokuju promjenu polja praga, niskofrekventne dinamike i dielektrične konstante, ali ne i linearne vodljivosti iznad TG, dok je ispod TG opažena samo promjena u linearnoj vodljivosti. Pokazano je da je zapinjanje faze u ozračenim uzorcima iznad TG jakog, a u dopiranim slabog karaktera. Ispod TG javlja se nelinearni kanal vodljivosti skokova varijabilnog dosega.
Abstract (english)	In this dissertation the influence of defects on the transition to charge density wave (CDW) state and properties of low energy CDW phase excitations has been studied in irradiated and doped samples of CDW system o-TaS3. Phase dynamics freezing at a temperature TG, as a part of complex properties of low energy excitations in CDW systems, is a consequence of CDW coupling to defects and free charge carriers. As the main motive of this research, proposed freezing criterion1 (according to which TG is determined by a number of free charge carriers within a CDW phase correlation domain) has been confirmed in samples with a wide range of defects. Transport and dielectric measurements, over a wide temperature, voltage and frequency range, show that the defects influence the threshold field, low-frequency dynamics and dielectric constant, but not the linear conductivity above TG, while below TG only an influence on the linear conductivity has been observed. Strong and weak phase pinning mechanisms above TG are confirmed in irradiated and doped samples, respectively. Below TG variable range hopping type of nonlinear conductivity channel appears.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:217:472492
Study programme	Title: Physics Study programme type: university Study level: postgraduate Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika (doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika)
Type of resource	Text
Extent	146 str.
File origin	Born digital
Access conditions	Open access
Terms of use
Repository	Repository of the Faculty of Science
Created on	2017-08-23 10:18:52

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