Ultrafast Gap Dynamics and Electronic Interactions in a Photoexcited Cuprate Superconductor

Parham, Stephen; Li, Haoxiang; Nummy, Thomas; Waugh, Justin; Zhou, Xiaoqing; Griffith, Justin; Schneeloch, John; Zhong, Ruidan; Gu, Genda; Dessau, D. S.

doi:10.1103/physrevx.7.041013

Cited by 33 publications

(32 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Time-and angle-resolved photoemission spectroscopy (tr-ARPES) measures changes in the band structure and single-particle spectral function of solids with momentum resolution (Bovensiepen and Kirchmann, 2012;Gedik and Vishik, 2017;Haight et al, 1988;Lv et al, 2019;Nicholson et al, 2018;Petek and Ogawa, 1997;Smallwood et al, 2016;Wegkamp et al, 2014;Zhou et al, 2018). This technique has been used, for example, to study decoherence effects in the excitation process (Höfer et al, 1997;Ogawa et al, 1997;Reutzel et al, 2019), to shed light on the physics of high-temperature superconductors (Avigo et al, 2013;Parham et al, 2017;Smallwood et al, 2012;Yang et al, 2014Yang et al, , 2019, to track the melting and recovery of charge-density wave orders (Hellmann et al, 2010(Hellmann et al, , 2012Perfetti et al, 2006;Rettig et al, 2016;Rohwer et al, 2011;Schmitt et al, 2008;Zong et al, 2019b), to directly probe excitonic states (Cui et al, 2014;Madéo et al, 2020), to measure the relaxation dynamics of photocurrents (Güdde and Höfer, 2021;Reimann et al, 2018) and the coupling between electronic and lattice degrees of freedom (Gerber et al, 2017;Kemper et al, 2017;Na et al, 2019). tr-ARPES also permits the detection of transiently populated topological states (Belopolski et al, 2017;Sobota et al, 2012…”

Section: Discussionmentioning

confidence: 99%

Colloquium: Nonthermal pathways to ultrafast control in quantum materials

Torre

Kennes²,

Claassen³

et al. 2021

Rev. Mod. Phys.

221

117

View full text Add to dashboard Cite

We review recent progress in utilizing ultrafast light-matter interaction to control the macroscopic properties of quantum materials. Particular emphasis is placed on photoinduced phenomena that do not result from ultrafast heating effects but rather emerge from microscopic processes that are inherently nonthermal in nature. Many of these processes can be described as transient modifications to the free energy landscape resulting from the redistribution of quasiparticle populations, the dynamical modification of coupling strengths and the resonant driving of the crystal lattice. Other pathways result from the coherent dressing of a material's quantum states by the light field. We discuss a selection of recently discovered effects leveraging these mechanisms, as well as the technological advances that led to their discovery. A road map for how the field can harness these nonthermal pathways to create new functionalities is presented.

show abstract

Section: Discussionmentioning

confidence: 99%

Colloquium: Nonthermal pathways to ultrafast control in quantum materials

Torre

Kennes²,

Claassen³

et al. 2021

Rev. Mod. Phys.

221

117

View full text Add to dashboard Cite

show abstract

“…We therefore employ a simple but microscopically insightful approach based on the transient electronic temperature of the system. While many trARPES studies have extracted a transient electronic temperature in a variety of materials, there are relatively few comparisons between the extracted electronic temperature and the k-resolved response of the system, [66][67][68]. In principle such a comparison allows the validity and role of a quasi-equilibrium temperature to be assessed on ultrafast time scales.…”

Section: Momentum-resolved Population Dynamicsmentioning

confidence: 99%

Excited-state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV-based time- and angle-resolved photoemission spectroscopy

et al. 2019

View full text Add to dashboard Cite

We investigate the excited state electronic structure of the model phase transition system In/Si(111) using femtosecond time-and angle-resolved photoemission spectroscopy (trARPES). An extreme ultraviolet (XUV) 500 kHz laser source at 21.7 eV is utilized to map the energy of excited states above the Fermi level, and follow the momentum-resolved population dynamics on a femtosecond time scale. Excited state band mapping is used to characterize the normally unoccupied electronic structure above the Fermi level in both structural phases of indium nanowires on Si (111): the metallic (4x1) and the gapped (8x2) phases. The extracted band positions are compared with the band structure calculated within density functional theory (DFT) within both the LDA and GW approximations. While good overall agreement is found between the GW calculated band structure and experiment, deviations in specific momentum regions may indicate the importance of excitonic effects not accounted for at this level of approximation. To probe the dynamics of these excited states, their momentum-resolved transient population dynamics are extracted with trARPES. The transient intensities are compared to a simulated spectral function modeled by a state population employing a transient elevated electronic temperature as determined experimentally. This allows the momentum-resolved population dynamics to be quantitatively reproduced, revealing important insights into the transfer of energy from the electronic system to the lattice. In particular, a comparison between the magnitude and relaxation time of the transient electronic temperature observed by trARPES with those of the lattice as probed in previous ultrafast electron diffraction studies implies a highly non-thermal phonon distribution at the surface following photo-excitation. This suggests that the energy from the initially excited electronic system is initially transferred to high energy optical phonon modes followed by cooling and thermalization of the photo-excited system by much slower phonon-phonon coupling. arXiv:1812.11385v3 [cond-mat.str-el]

show abstract

“…In recent years established experimental and theoretical approaches, which investigate the thermal equilibrium, were complemented by methods which access nonequilibrium states of matter in the time domain. While part of the activity aims at states and properties which exist out of equilibrium [4][5][6][7][8], also new tools for the analysis of excitations in strongly correlated materials were introduced [9][10][11][12][13]. For low-energy excitations up to 100 meV differences between the single-particle and the population lifetimes occur due to carrier relaxation and multiplication [14].…”

mentioning

confidence: 99%