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Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research
Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103013
- ISBN
- 9798286444038
- DDC
- 530
- 저자명
- Wei, Wenzheng.
- 서명/저자
- Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research
- 발행사항
- [Sl] : Yale University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 192 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Ahn, Charles H.
- 학위논문주기
- Thesis (Ph.D.)--Yale University, 2025.
- 초록/해제
- 요약This dissertation reports on developments in quantum materials synthesis and characterization, with an emphasis on the study of superconducting nickelates through molecular beam epitaxy (MBE) and real-time synchrotron hard X-ray data analysis. The work elaborates on the developments in MBE synthesis, real-time characterization, and strategic materials design, and leads to the discovery of a nickelate superconductor. High resolution X-ray diffraction measurements were taken at the Advanced Photon Source, Argonne National Laboratory.The dissertation reports on the development of real-time analysis frameworks for both synthesis and characterization. This includes dynamic MBE source flux calibration techniques using RHEED and the shutter-control method, as well as data analysis approaches for real-time crystal truncation rod (CTR) intensity analysis from synchrotron data.The dissertation then introduces the aluminum-based reduction method for infinite-layer nickelate synthesis, which provides precise control over oxygen content through control of aluminum coverage via real-time electronic and atomic structure characterization using synchrotron MBE facilities. This technique circumvents calcium hydride post-annealing treatment and reduces surface contamination. The synthesized thin films are comprehensively characterized using CTR, diffraction X-ray absorption near edge structure (dXANES) and scanning transmission electron microscopy (STEM).The dissertation then discusses the discovery of superconducting Nd1-xEuxNiO2. Europium is introduced as a rare-earth dopant as part of a strategic material design approach. It maintains chemical compatibility during synthesis and achieves hole doping through a Ni-3d Eu-4f self-doping mechanism. The Eu substitution produces a superconductor with a transition temperature of 21K and unusual magnetic properties, expands the family of superconducting nickelates and provides new insights into oxide superconductivity.
- 일반주제명
- Condensed matter physics
- 일반주제명
- Materials science
- 일반주제명
- Quantum physics
- 일반주제명
- Nanotechnology
- 기타저자
- Yale University Applied Physics
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103013
■006m o d
■007cr#unu||||||||
■020 ▼a9798286444038
■035 ▼a(MiAaPQ)AAI31842979
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aWei, Wenzheng.
■24510▼aReal-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research
■260 ▼a[Sl]▼bYale University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a192 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Ahn, Charles H.
■5021 ▼aThesis (Ph.D.)--Yale University, 2025.
■520 ▼aThis dissertation reports on developments in quantum materials synthesis and characterization, with an emphasis on the study of superconducting nickelates through molecular beam epitaxy (MBE) and real-time synchrotron hard X-ray data analysis. The work elaborates on the developments in MBE synthesis, real-time characterization, and strategic materials design, and leads to the discovery of a nickelate superconductor. High resolution X-ray diffraction measurements were taken at the Advanced Photon Source, Argonne National Laboratory.The dissertation reports on the development of real-time analysis frameworks for both synthesis and characterization. This includes dynamic MBE source flux calibration techniques using RHEED and the shutter-control method, as well as data analysis approaches for real-time crystal truncation rod (CTR) intensity analysis from synchrotron data.The dissertation then introduces the aluminum-based reduction method for infinite-layer nickelate synthesis, which provides precise control over oxygen content through control of aluminum coverage via real-time electronic and atomic structure characterization using synchrotron MBE facilities. This technique circumvents calcium hydride post-annealing treatment and reduces surface contamination. The synthesized thin films are comprehensively characterized using CTR, diffraction X-ray absorption near edge structure (dXANES) and scanning transmission electron microscopy (STEM).The dissertation then discusses the discovery of superconducting Nd1-xEuxNiO2. Europium is introduced as a rare-earth dopant as part of a strategic material design approach. It maintains chemical compatibility during synthesis and achieves hole doping through a Ni-3d Eu-4f self-doping mechanism. The Eu substitution produces a superconductor with a transition temperature of 21K and unusual magnetic properties, expands the family of superconducting nickelates and provides new insights into oxide superconductivity.
■590 ▼aSchool code: 0265.
■650 4▼aCondensed matter physics
■650 4▼aMaterials science
■650 4▼aQuantum physics
■650 4▼aNanotechnology
■653 ▼aSuperconducting nickelates
■653 ▼aMolecular beam epitaxy
■653 ▼aReal-time synchrotron X-ray analysis
■653 ▼aOxide superconductivity
■690 ▼a0611
■690 ▼a0599
■690 ▼a0794
■690 ▼a0652
■71020▼aYale University▼bApplied Physics.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0265
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356668▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
