LEADER 03948nam 22006615 450 001 9910805575603321 005 20240122080200.0 010 $a3-031-42826-9 024 7 $a10.1007/978-3-031-42826-5 035 $a(CKB)30098030100041 035 $a(MiAaPQ)EBC31083143 035 $a(Au-PeEL)EBL31083143 035 $a(DE-He213)978-3-031-42826-5 035 $a(EXLCZ)9930098030100041 100 $a20240122d2023 u| 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aTowards the Optical Control of Resonantly Bonded Materials$b[electronic resource] $eAn Ultrafast X-Ray Study /$fby Yijing Huang 205 $a1st ed. 2023. 210 1$aCham :$cSpringer Nature Switzerland :$cImprint: Springer,$d2023. 215 $a1 online resource (165 pages) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5061 311 08$a9783031428258 327 $aChapter 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. 330 $aThis thesis describes key contributions to the fundamental understanding of materials structure and dynamics from a microscopic perspective. In particular, the thesis reports several advancements in time-domain methodologies using ultrafast pulses from X-ray free-electron lasers (FEL) to probe the interactions between electrons and phonons in photoexcited materials. Using femtosecond time-resolved X-ray diffraction, the author quantifies the coherent atomic motion trajectory upon sudden excitation of carriers in SnSe. This allows the reconstruction of the nonequilibrium lattice structure and identification of a novel lattice instability towards a higher-symmetry structure not found in equilibrium. This is followed by an investigation of the excited-state phonon dispersion in SnSe using time-resolved X-ray diffuse scattering which enables important insight into how photoexcitation alters the strength of specific bonds leading to the novel lattice instability observed in X-ray diffraction. Finally, by combining ultrafast X-ray diffraction and ARPES, the author performs quantitative measurements of electron-phonon coupling in Bi2Te3 and Bi2Se3. The findings highlight the importance of time-resolved X-ray scattering techniques based on FELs, which reveals the details of interplay between electron orbitals, atomic bonds, and structural instabilities. The microscopic information of electron phonon interaction obtained from these methods can rationalize ways to control materials and to design their functional properties. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5061 606 $aLasers 606 $aOptical spectroscopy 606 $aCondensed matter 606 $aSolid state physics 606 $aLaser 606 $aLaser-Matter Interaction 606 $aOptical Spectroscopy 606 $aStructure of Condensed Matter 606 $aElectronic Devices 606 $aPhase Transition and Critical Phenomena 615 0$aLasers. 615 0$aOptical spectroscopy. 615 0$aCondensed matter. 615 0$aSolid state physics. 615 14$aLaser. 615 24$aLaser-Matter Interaction. 615 24$aOptical Spectroscopy. 615 24$aStructure of Condensed Matter. 615 24$aElectronic Devices. 615 24$aPhase Transition and Critical Phenomena. 676 $a530.416 700 $aHuang$b Yijing$01589008 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910805575603321 996 $aTowards the Optical Control of Resonantly Bonded Materials$93883251 997 $aUNINA