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Towards the optical control of resonantly bonded materials = an ultrafast x-ray study /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Towards the optical control of resonantly bonded materials/ by Yijing Huang.
其他題名:	an ultrafast x-ray study /
作者:	Huang, Yijing.
出版者:	Cham :Springer Nature Switzerland : : 2023.,
面頁冊數:	xii, 159 p. :ill. (some col.), digital ;24 cm.
附註:	"Doctoral thesis accepted by Stanford University, CA, USA."
內容註:	Chapter 1: Ultrafast X-ray Scattering and Nonequilibrium States of Matter -- Chapter 2: Lattice Dynamics: Excitation and Probe -- Chapter 3: Resonantly Bonded Semiconductors -- Chapter 4: Ultrafast Lasers and X-ray Pump Probe Experiment -- Chapter 5: Photoinduced Novel Lattice Instability in SnSe.
Contained By:	Springer Nature eBook
標題:	Lattice dynamics. -
電子資源:	https://doi.org/10.1007/978-3-031-42826-5
ISBN:	9783031428265

Towards the optical control of resonantly bonded materials = an ultrafast x-ray study /
Huang, Yijing.

Towards the optical control of resonantly bonded materialsan ultrafast x-ray study /[electronic resource] :by Yijing Huang. - Cham :Springer Nature Switzerland :2023. - xii, 159 p. :ill. (some col.), digital ;24 cm. - Springer theses,2190-5061. - Springer theses..

"Doctoral thesis accepted by Stanford University, CA, USA."

Chapter 1: Ultrafast X-ray Scattering and Nonequilibrium States of Matter -- Chapter 2: Lattice Dynamics: Excitation and Probe -- Chapter 3: Resonantly Bonded Semiconductors -- Chapter 4: Ultrafast Lasers and X-ray Pump Probe Experiment -- Chapter 5: Photoinduced Novel Lattice Instability in SnSe.

This thesis describes key contributions to the fundamental understanding of materials structure and dynamics from a microscopic perspective. In particular, the thesis reports several advancements in time-domain methodologies using ultrafast pulses from X-ray free-electron lasers (FEL) to probe the interactions between electrons and phonons in photoexcited materials. Using femtosecond time-resolved X-ray diffraction, the author quantifies the coherent atomic motion trajectory upon sudden excitation of carriers in SnSe. This allows the reconstruction of the nonequilibrium lattice structure and identification of a novel lattice instability towards a higher-symmetry structure not found in equilibrium. This is followed by an investigation of the excited-state phonon dispersion in SnSe using time-resolved X-ray diffuse scattering which enables important insight into how photoexcitation alters the strength of specific bonds leading to the novel lattice instability observed in X-ray diffraction. Finally, by combining ultrafast X-ray diffraction and ARPES, the author performs quantitative measurements of electron-phonon coupling in Bi2Te3 and Bi2Se3. The findings highlight the importance of time-resolved X-ray scattering techniques based on FELs, which reveals the details of interplay between electron orbitals, atomic bonds, and structural instabilities. The microscopic information of electron phonon interaction obtained from these methods can rationalize ways to control materials and to design their functional properties.

ISBN: 9783031428265

Standard No.: 10.1007/978-3-031-42826-5doiSubjects--Topical Terms:

704788
Lattice dynamics.

LC Class. No.: QC176.8.L3

Dewey Class. No.: 530.411

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520 $a This thesis describes key contributions to the fundamental understanding of materials structure and dynamics from a microscopic perspective. In particular, the thesis reports several advancements in time-domain methodologies using ultrafast pulses from X-ray free-electron lasers (FEL) to probe the interactions between electrons and phonons in photoexcited materials. Using femtosecond time-resolved X-ray diffraction, the author quantifies the coherent atomic motion trajectory upon sudden excitation of carriers in SnSe. This allows the reconstruction of the nonequilibrium lattice structure and identification of a novel lattice instability towards a higher-symmetry structure not found in equilibrium. This is followed by an investigation of the excited-state phonon dispersion in SnSe using time-resolved X-ray diffuse scattering which enables important insight into how photoexcitation alters the strength of specific bonds leading to the novel lattice instability observed in X-ray diffraction. Finally, by combining ultrafast X-ray diffraction and ARPES, the author performs quantitative measurements of electron-phonon coupling in Bi2Te3 and Bi2Se3. The findings highlight the importance of time-resolved X-ray scattering techniques based on FELs, which reveals the details of interplay between electron orbitals, atomic bonds, and structural instabilities. The microscopic information of electron phonon interaction obtained from these methods can rationalize ways to control materials and to design their functional properties.
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