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Real-Time Synthesis and Characteriza...

Wei, Wenzheng,

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Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research // Wenzheng Wei.
Author:	Wei, Wenzheng,
Description:	1 electronic resource (192 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
Contained By:	Dissertations Abstracts International86-12B.
Subject:	Condensed matter physics. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31842979
ISBN:	9798286444038

Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research /
Wei, Wenzheng,

Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research /Wenzheng Wei. - 1 electronic resource (192 pages)

Source: Dissertations Abstracts International, Volume: 86-12, Section: B.

This 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.

English

ISBN: 9798286444038Subjects--Topical Terms:

3173567
Condensed matter physics.
Subjects--Index Terms:

Superconducting nickelates

Real-Time Synthesis and Characterization in Quantum Materials: Insights from Superconducting Nickelate Research /
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520 $a This 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.
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650 4 $a Materials science. $3 543314
650 4 $a Quantum physics. $3 726746
650 4 $a Nanotechnology. $3 526235
653 $a Superconducting nickelates
653 $a Molecular beam epitaxy
653 $a Real-time synchrotron X-ray analysis
653 $a Oxide superconductivity
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791 $a Ph.D.
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