東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Charge Density Wave Engineering in R...

Yumigeta, Kentaro,

Linked to FindBook

Google Book

Amazon

博客來

Charge Density Wave Engineering in Rare-Earth Tritellurides: Investigating Stability Analysis and Large Area Deposition Technique for Novel Applications /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Charge Density Wave Engineering in Rare-Earth Tritellurides: Investigating Stability Analysis and Large Area Deposition Technique for Novel Applications // Kentaro Yumigeta.
Author:	Yumigeta, Kentaro,
Description:	1 electronic resource (324 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
Subject:	Materials science. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30485371
ISBN:	9798379531980

Charge Density Wave Engineering in Rare-Earth Tritellurides: Investigating Stability Analysis and Large Area Deposition Technique for Novel Applications /
Yumigeta, Kentaro,

Charge Density Wave Engineering in Rare-Earth Tritellurides: Investigating Stability Analysis and Large Area Deposition Technique for Novel Applications /Kentaro Yumigeta. - 1 electronic resource (324 pages)

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Rare-earth tritellurides (RTe3) are two-dimensional materials with unique quantum properties, ideal for investigating quantum phenomena and applications in supercapacitors, spintronics, and twistronics. This dissertation examines the electronic, magnetic, and phononic properties of the RTe3 family, exploring how these can be controlled using chemical pressure, cationic alloying, and external pressure.The impact of chemical pressure on RTe3 phononic properties was investigated through noninvasive micro-Raman spectroscopy, demonstrating the potential of optical measurements for determining charge density wave (CDW) transition temperatures. Cationic alloying studies showed seamless tuning of CDW transition temperatures by modifying lattice constants and revealed complex magnetism in alloyed RTe3 with multiple magnetic transitions.A comprehensive external pressure study examined the influence of spacing between RTe3 layers on phononic and CDW properties across the RTe3 family. Comparisons between different RTe3 materials showed LaTe3, with the largest thermodynamic equilibrium interlayer spacing (smallest chemical pressure), has the most stable CDW phases at high pressures. Conversely, CDW phases in late RTe3 systems with larger internal chemical pressures were more easily suppressed by applied pressure.The dissertation also investigated Schottky barrier realignment at RTe3/semiconductor interfaces induced by CDW transitions, revealing changes in Schottky barrier height and ideality factor around the CDW transition temperature. This indicates that chemical potential changes of RTe3 below the CDW transition temperature influence Schottky junction properties, enabling CDW state probing through interface property measurements.A detailed experimental and theoretical analysis of the oxidation process of RTe3 compounds was performed, which revealed faster degradation in late RTe3 systems. Electronic property changes, like CDW transition temperature and chemical potential, are observed as degradation progresses. Quantum mechanical simulations suggested that degradation primarily results from strong oxidizing reactions with O2 molecules, while humidity (H2O) plays a negligible role unless Te vacancies exist.Lastly, the dissertation establishes a large-area thin film deposition at relatively low temperatures using a soft sputtering technique. While focused on MoTe2 deposition, this technique may also apply to RTe3 thin film deposition.Overall, this dissertation expands the understanding of the fundamental properties of RTe3 materials and lays the groundwork for potential device applications.

English

ISBN: 9798379531980Subjects--Topical Terms:

543314
Materials science.
Subjects--Index Terms:

Wave engineering

Charge Density Wave Engineering in Rare-Earth Tritellurides: Investigating Stability Analysis and Large Area Deposition Technique for Novel Applications /
LDR:04128nmm a22004213i 4500 001 2434030
005 20250905091329.5
006 m o d
007 cr|nu||||||||
008 261011s2023 miu||||||m |||||||eng d
020 $a 9798379531980
035 $a (MiAaPQD)AAI30485371
035 $a AAI30485371
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Yumigeta, Kentaro, $e author. $3 3823872
245 1 0 $a Charge Density Wave Engineering in Rare-Earth Tritellurides: Investigating Stability Analysis and Large Area Deposition Technique for Novel Applications / $c Kentaro Yumigeta.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 1 electronic resource (324 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
500 $a Advisors: Tongay, Sefaattin Committee members: Ponce, Fernando; Drucker, Jeffery; Erten, Onur.
502 $b Ph.D. $c Arizona State University $d 2023.
520 $a Rare-earth tritellurides (RTe3) are two-dimensional materials with unique quantum properties, ideal for investigating quantum phenomena and applications in supercapacitors, spintronics, and twistronics. This dissertation examines the electronic, magnetic, and phononic properties of the RTe3 family, exploring how these can be controlled using chemical pressure, cationic alloying, and external pressure.The impact of chemical pressure on RTe3 phononic properties was investigated through noninvasive micro-Raman spectroscopy, demonstrating the potential of optical measurements for determining charge density wave (CDW) transition temperatures. Cationic alloying studies showed seamless tuning of CDW transition temperatures by modifying lattice constants and revealed complex magnetism in alloyed RTe3 with multiple magnetic transitions.A comprehensive external pressure study examined the influence of spacing between RTe3 layers on phononic and CDW properties across the RTe3 family. Comparisons between different RTe3 materials showed LaTe3, with the largest thermodynamic equilibrium interlayer spacing (smallest chemical pressure), has the most stable CDW phases at high pressures. Conversely, CDW phases in late RTe3 systems with larger internal chemical pressures were more easily suppressed by applied pressure.The dissertation also investigated Schottky barrier realignment at RTe3/semiconductor interfaces induced by CDW transitions, revealing changes in Schottky barrier height and ideality factor around the CDW transition temperature. This indicates that chemical potential changes of RTe3 below the CDW transition temperature influence Schottky junction properties, enabling CDW state probing through interface property measurements.A detailed experimental and theoretical analysis of the oxidation process of RTe3 compounds was performed, which revealed faster degradation in late RTe3 systems. Electronic property changes, like CDW transition temperature and chemical potential, are observed as degradation progresses. Quantum mechanical simulations suggested that degradation primarily results from strong oxidizing reactions with O2 molecules, while humidity (H2O) plays a negligible role unless Te vacancies exist.Lastly, the dissertation establishes a large-area thin film deposition at relatively low temperatures using a soft sputtering technique. While focused on MoTe2 deposition, this technique may also apply to RTe3 thin film deposition.Overall, this dissertation expands the understanding of the fundamental properties of RTe3 materials and lays the groundwork for potential device applications.
546 $a English
590 $a School code: 0010
650 4 $a Materials science. $3 543314
650 4 $a Applied physics. $3 3343996
653 $a Wave engineering
653 $a Tritellurides
653 $a Novel applications
653 $a Semiconductor
653 $a Cationic alloying
690 $a 0794
690 $a 0215
710 2 $a Arizona State University. $b Physics. $e degree granting institution. $3 3816096
720 1 $a Tongay, Sefaattin $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 84-11B.
790 $a 0010
791 $a Ph.D.
792 $a 2023
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30485371