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26 papers · 2 filters
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…
Triply degenerate nodal points in RERhGe (RE=Y, La, Lu)
Peng-Jie Guo, Huan-Cheng Yang, Kai Liu +1
As a new type of fermions without counterpart in high energy physics, triply degenerate fermions show exotic physical properties, which are represented by triply degenerate nodal p…
Three dimensional localization of nanoscale battery reactions using soft X-ray tomography
Young-Sang Yu, Maryam Farmand, Chunjoong Kim +16
Battery function is determined by the efficiency and reversibility of the electrochemical phase transformations at solid electrodes. The microscopic tools available to study the ch…
Velocity-gauge real-time TDDFT within a numerical atomic orbital basis set
C. D. Pemmaraju, F. D. Vila, J. J. Kas +4
The interaction of laser fields with solid-state systems can be modeled efficiently within the velocity-gauge formalism of real-time time dependent density functional theory (RT-TD…
Direct Measurement of Anharmonic Decay Channels of a Coherent Phonon
Samuel W. Teitelbaum, Tom Henighan, Yijing Huang +12
We observe anharmonic decay of the photoexcited coherent A1g phonon in bismuth to points in the Brillouin zone where conservation of momentum and energy are satisfied for three-pho…
On-the-fly Data Assessment for High Throughput X-ray Diffraction Measurement
Fang Ren, Ronald Pandolfi, Douglas Van Campen +2
Investment in brighter sources and larger and faster detectors has accelerated the speed of data acquisition at national user facilities. The accelerated data acquisition offers ma…