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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

Institutional repository: Repository of the Faculty of Science

Cite this document

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

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

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

Dominko, D. (2012). 'Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja', Doctoral thesis, University of Zagreb, Faculty of Science, accessed 29 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:472492

Dominko D. Utjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Science; 2012 [cited 2024 November 29] Available at: https://urn.nsk.hr/urn:nbn:hr:217:472492

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

Metadata
TitleUtjecaj kristalnih defekata na fazna pobuđenja u valovima gustoće naboja
Title (english)Influence of crystal defects on phase excitations in charge density waves
AuthorDamir Dominko
MentorDamir Starešinić (mentor)
Committee memberSlaven Barišić (predsjednik povjerenstva)
Committee memberDamir Starešinić (član povjerenstva)
Committee memberSilvia Tomić (član povjerenstva)
Committee memberIvo Batistić (član povjerenstva)
Committee memberMario Basletić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Physics)
Zagreb
Defense date and country2012-09-25, 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)
Languagecroatian
URN:NBNurn:nbn:hr:217:472492
Study programmeTitle: 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 resourceText
Extent146 str.
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2017-08-23 10:18:52