555 citations · 2.5k across the 34 of their papers we have counts for
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Collective Magnetic Excitations in a Photo-excited Electron-doped Cuprate Superconductor
Daniel Jost, Jiarui Li, Jordyn Hales +21
Elucidating the microscopic behavior of cuprates under ultrafast photoexcitation offers critical insights into their highly correlated out-of-equilibrium states. Although quasipart…
Reconstructing the wavefunction of magnetic topological insulators MnBi2Te4 and MnBi4Te7 using spin-resolved photoemission
Xue Han, Jason Qu, Hengxin Tan +7
Despite their importance for exotic quantum effects, the surface electronic structure of magnetic topological insulators MnBi2Te4 and MnBi4Te7 remains poorly understood. Using high…
Reexamining Circular Dichroism in Photoemission From a Topological Insulator
Ittai Sidilkover, Yun Yen, Sunil Wilfred D'Souza +10
The orbital angular momentum (OAM) of electron states is an essential ingredient for topological and quantum geometric quantities in solids. For example, Dirac surface states with…
Analysis methodology of coherent oscillations in time- and angle-resolved photoemission spectroscopy
Nicolas Gauthier, Hadas Soifer, Jonathan A. Sobota +5
Oscillatory signals from coherently excited phonons are regularly observed in ultrafast pump-probe experiments on condensed matter samples. Electron-phonon coupling implies that co…
Ultrafast measurements of mode-specific deformation potentials of BiTe and BiSe
Yijing Huang, José D. Querales-Flores, Samuel W. Teitelbaum +24
Quantifying electron-phonon interactions for the surface states of topological materials can provide key insights into surface-state transport, topological superconductivity, and p…
Influence of local symmetry on lattice dynamics coupled to topological surface states
Jonathan A. Sobota, Samuel W. Teitelbaum, Yijing Huang +18
We investigate coupled electron-lattice dynamics in the topological insulator Bi2Te3 with time-resolved photoemission and time-resolved x-ray diffraction. It is well established th…
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…
Evidences for the exciton gas phase and its condensation in monolayer 1T-ZrTe2
Yekai Song, Chunjing Jia, Hongyu Xiong +15
The excitonic insulator (EI) is a Bose-Einstein condensation (BEC) of excitons bound by electron-hole interaction in a solid, which could support high-temperature BEC transition. T…
Connection between coherent phonons and electron-phonon coupling in Sb (111)
Shoya Sakamoto, Nicolas Gauthier, Patrick S. Kirchmann +2
We report time- and angle-resolved photoemission spectroscopy measurements on the Sb(111) surface. We observe band- and momentum-dependent binding-energy oscillations in the bulk a…
Tuning time and energy resolution in time-resolved photoemission spectroscopy with nonlinear crystals
Alexandre Gauthier, Jonathan A. Sobota, Nicolas Gauthier +5
Time- and angle-resolved photoemission spectroscopy is a powerful probe of electronic band structures out of equilibrium. Tuning time and energy resolution to suit a particular sci…
Band resolved imaging of photocurrent in a topological insulator
Hadas Soifer, Alexandre Gauthier, Alexander F. Kemper +8
We study the microscopic origins of photocurrent generation in the topological insulator BiSe via time- and angle-resolved photoemission spectroscopy. We image the unoccupi…
3D nature of ZrTe band structure measured by high-momentum-resolution photoemission spectroscopy
H. Xiong, J. A. Sobota, S. -L. Yang +10
We have performed a systematic high-momentum-resolution photoemission study on ZrTe using eV photon energy. We have measured the band structure near the point, and quan…
Spin-Polarized Surface Resonances Accompanying Topological Surface State Formation
Chris Jozwiak, Jonathan A. Sobota, Kenneth Gotlieb +7
Topological insulators host spin-polarized surface states born out of the energetic inversion of bulk bands driven by the spin-orbit interaction. Here we discover previously uniden…
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…
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…
Electron propagation from a photo-excited surface: implications for time-resolved photoemission
Shuolong Yang, Jonathan A. Sobota, Patrick S. Kirchmann +1
We perform time- and angle-resolved photoelectron spectroscopy on p-type GaAs(110). We observe an optically excited population in the conduction band, from which the time scales of…
Direct Optical Coupling to an Unoccupied Dirac Surface State in the Topological Insulator BiSe
Jonathan A. Sobota, Shuolong Yang, Alexander F. Kemper +9
We characterize the occupied and unoccupied electronic structure of the topological insulator BiSe by one-photon and two-photon angle-resolved photoemission spectroscopy an…
Electronic Structure of the Metallic Antiferromagnet PdCrO Measured by Angle-Resolved Photoemission Spectroscopy
Jonathan A. Sobota, Kyoo Kim, Hiroshi Takatsu +8
PdCrO is material which has attracted interest due to the coexistence of metallic conductivity associated with itinerant Pd 4d electrons and antiferromagnetic order arising fro…
Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3
Jonathan A. Sobota, Shuolong Yang, James G. Analytis +4
Using femtosecond time- and angle- resolved photoemission spectroscopy, we investigated the nonequilibrium dynamics of the topological insulator Bi2Se3. We studied p-type Bi2Se3, i…