136 citations · 1k across the 18 of their papers we have counts for
17 papers
Coherent Light Control of a Metastable Hidden Phase
J. Maklar, S. Dong, J. Sarkar +13
Metastable phases present a promising route to expand the functionality of complex materials. Of particular interest are light-induced metastable phases that are inaccessible under…
Nonequilibrium Charge-Density-Wave Order Beyond the Thermal Limit
J. Maklar, Y. W. Windsor, C. W. Nicholson +17
The interaction of many-body systems with intense light pulses may lead to novel emergent phenomena far from equilibrium. Recent discoveries, such as the optical enhancement of the…
Formation of buried domain walls in the ultrafast transition of SmTe
M. Trigo, P. Giraldo-Gallo, J. N. Clark +13
We study ultrafast x-ray diffraction on the charge density wave (CDW) of SmTe using an x-ray free electron laser. The CDW peaks show that photoexcitation with near-infrared pum…
Mode-selective coupling of coherent phonons to the Bi2212 electronic band structure
S. -L. Yang, J. A. Sobota, Y. He +5
Cuprate superconductors host a multitude of low-energy optical phonons. Using time- and angle-resolved photoemission spectroscopy, we study coherent phonons in BiSrCa$_…
Coherent order parameter dynamics in SmTe
M. Trigo, P. Giraldo-Gallo, M. E. Kozina +13
We present a combined ultrafast optical pump-probe and ultrafast x-ray diffraction measurement of the CDW dynamics in SmTe at 300 K. The ultrafast x-ray diffraction measurement…
Revealing the Coulomb interaction strength in a cuprate superconductor
S. -L. Yang, J. A. Sobota, Y. He +10
We study optimally doped BiSrCaYCuO (Bi2212) using angle-resolved two-photon photoemission spectroscopy. Three spectral features are res…
High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser
Yu He, Inna Vishik, Ming Yi +12
We developed a table-top vacuum ultraviolet (VUV) laser with nm wavelength (10.897eV) and demonstrated its viability as a photon source for high resolution angle-resolved…
Thickness-Dependent Coherent Phonon Frequency in Ultrathin FeSe/SrTiO Films
Shuolong Yang, Jonathan A. Sobota, Dominik Leuenberger +7
Ultrathin FeSe films grown on SrTiO substrates are a recent milestone in atomic material engineering due to their important role in understanding unconventional superconducti…
Inequivalence of Single-Particle and Population Lifetimes in a Cuprate Superconductor
Shuolong Yang, Jonathan A. Sobota, Dominik Leuenberger +6
We study optimally doped Bi-2212 (~K) using femtosecond time- and angle-resolved photoelectron spectroscopy. Energy-resolved population lifetimes are extracted and…
Classification of Collective Modes in a Charge Density Wave by Momentum-Dependent Modulation of the Electronic Band Structure
D. Leuenberger, J. A. Sobota, S. -L. Yang +7
We present time- and angle-resolved photoemission spectroscopy measurements on the charge density wave system CeTe. Optical excitation transiently populates the unoccupied ba…
Direct characterization of photo-induced lattice dynamics in BaFe2As2
S. Gerber, K. W. Kim, Y. Zhang +21
Ultrafast light pulses can modify the electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconduc…
Distinguishing bulk and surface electron-phonon coupling in the topological insulator Bi2Se3 using time-resolved photoemission spectroscopy
Jonathan A. Sobota, Shuolong Yang, Dominik Leuenberger +6
We report time- and angle-resolved photoemission spectroscopy measurements on the topological insulator Bi2Se3. We observe oscillatory modulations of the electronic structure of bo…
Ultrafast Electron Dynamics in the Topological Insulator Bi2Se3 Studied by Time-Resolved Photoemission Spectroscopy
Jonathan A. Sobota, Shuolong Yang, Dominik Leuenberger +6
We characterize the topological insulator BiSe using time- and angle- resolved photoemission spectroscopy. By employing two-photon photoemission, a complete picture of the…
Excitation of coherent phonons in the one-dimensional Bi(114) surface
D. Leuenberger, H. Yanagisawa, S. Roth +5
We present time-resolved photoemission experiments from a peculiar bismuth surface, Bi(114). The strong one-dimensional character of this surface is reflected in the Fermi surface,…
Mechanism of Laser-induced Field Emission
Hirofumi Yanagisawa, Matthias Hengsberger, Dominik Leuenberger +4
We have measured electron energy distribution curves (EDCs) of the laser-induced field emission from a tungsten tip. Field emission from photo-excited nonequilibrium electron distr…
Laser-induced Field Emission from Tungsten Tip: Optical Control of Emission Sites and Emission Process
Hirofumi Yanagisawa, Christian Hafner, Patrick Doná +5
Field-emission patterns from a clean tungsten tip apex induced by femtosecond laser pulses have been investigated. Strongly asymmetric field-emission intensity distributions are ob…
Optical Control of Field-Emission Sites by Femtosecond Laser Pulses
Hirofumi Yanagisawa, Christian Hafner, Patrick Doná +5
We have investigated field emission patterns from a clean tungsten tip apex induced by femtosecond laser pulses. Strongly asymmetric modulations of the field emission intensity dis…