Overview
15-period undulator, 31-pole APPLE-II EPU, 0.65 mrad acceptance
Because BL5-2 and BL5-4 cannot operate simultaneously, they are often shown combined as BL5-4/BL5-2. Users may choose either experimental station for their beamtime. Please confirm with the responsible beam line scientists on the readiness of desired experimental station in advance.
The BL5-4 station is a normal incidence monochromator beam line optimized for high-resolution angle-resolved photoemission spectroscopy (ARPES) in the photon energy range of 7 - 40 eV with polarization control (circular polarizations: 7 - 40 eV, linear polarizations: 16 - 40 eV). The dedicated experimental end station is equipped with a SCIENTA R4000 electron spectrometer. This system is capable of performing ARPES experiments with a total energy resolution of a few meV and an angular resolution of 0.3°. It is also equipped with a low-temperature sample manipulator with two degree of freedom of rotation, which can be cooled down to 5 K.
Sample Environment —
| UHV | < 3 X 10-11 Torr |
|---|---|
| Sample temperature | 5 - 300 K |
| Sample size | < 5 x 5 mm2 |
| Annealing temperature | < 650 °C |
| Alkaline metal doser (K, Rb, Li) |
Instrumentation —
| Detector | SCIENTA DA30 Electron Analyzer |
|---|---|
| Manipulator | Low-temperature 5-axis Manipulator |
| Low Energy Electron Diffraction (LEED) |
Specifications
Technical Specifications
Energy —
| Energy Range | Resolution ΔE/E | Spot Size | Flux | |
|---|---|---|---|---|
| Focused | 7-40 eV | ≥ 5 X 10-5 | 0.1(H) X 0.1(V) mm2 | ~ 8 X 1011 *@500 mA, 22 eV, E/ΔE = 10,000 |
Optics —
| M0 Mirror | M1 Mirror | Monochromator | M3 Mirror | M4 Mirror |
|---|---|---|---|---|
| Horizontal deflecting, flat, water-cooled | Vertical focusing 10:1, elliptically cylinder | Normal Incidence Monochromator (NIM)
|
Horizontal refocusing 1:1, cylinder | Vertical refocusing 1:1, cylinder |
Publications
Publications
Highlights
Science Highlights
Beam Line 5-2 Science Highlights
Pinning the Geometrically-frustrated Flat Band to the Fermi Level with Electron Correlation
Designing a Higher-Order Topological Insulator Composed of Bismuth-Halide Chains
Electronic Nematicity without Magnetism in FeSe
Discovery of Topological Weyl Fermion Lines and Drumhead Surface States in a Room Temperature Magnet
Questioning the Universality of the Charge Density Wave Nature in Electron-doped Cuprates
Experimental Station 5-2
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Beam Line 5-4 Science Highlights
Hunting the Spectroscopic Signature of Tc in Cuprate Superconductors
“What is Dead May Never Die” - Fluctuating Superconductivity Illuminates a Path towards Better Superconductors
Lattice Coupling Conspires in the Correlated Cuprate High-Tc Superconductivity
Strong Orbital-selective Correlation Effects Unite Iron Chalcogenide Superconductors
Spectroscopic Evidence for Negative Electronic Compressibility in a Quasi-three-dimensional Spin-orbit Correlated Metal
Interfacial Electron-Phonon Coupling as the Cause of Enhanced Tc in Single-layer FeSe Films on SrTiO3
Spectroscopic Evidence for the Phase Competition between the Pseudogap and High-Tc Superconductivity
Experimental Station 5-4
Magnetism and Superconductivity Compete in Iron-based Superconductors
Discovery of a Single Topological Dirac Fermion in the Strong Inversion Asymmetric Compound BiTeCl
Competing Phases Found in High-Temperature Superconductor
Navigating Fermi Arcs
Pseudogap and Superconducting Gap in High-Temperature Superconductors
From Mott Insulator to High-Tc Superconductor
Bridging the Gaps of High-Tc Superconductor
A New Mechanism of Charge Density Wave Discovered in Transition Metal Dichalcogenides
Electronic Structure of LaOFeP - a Different Type of High Temperature Superconductor
Experiments Provide First Direct Signatures of a Topological Insulator - a New Phase of Quantum Matter
Particle-hole Symmetry Broken Pseudogap in High Temperature Superconductors
Nodal Superconducting Gap Structure in Ferropnictide Superconductor BaFe2(As0.7P0.3)2
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