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High-Pressure Neutron Scattering for Competing Order Analysis in Correlated Electron Systems

Explore manipulating competing orders with high-pressure techniques in correlated electron systems using neutron scattering. Investigate charge and spin stripes, superconductivity, magnetism, and electronic order in materials like high-temperature superconductors, transition metal oxides, ferroelectrics, heavy fermion systems, and multiferroics. Utilize advanced equipment like single-crystal XRD at low temperature, point detectors, and diamond anvil cells for precise analysis. Collaborate with experts in the field to study lattice and charge densities under pressure and doping effects.

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High-Pressure Neutron Scattering for Competing Order Analysis in Correlated Electron Systems

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  1. Manipulating Competing Order with High Pressure M. Hücker Neutron Scattering Group (CMPMS) La2-xBaxCuO4 Charge & Spin Stripes Correlated Electron Systems (Superconductivity, Magnetism, Electronic Order) • High Temperature Superconductors • Transition Metal Oxides • Ferroelectrics • Heavy Fermion Systems • Multiferroics

  2. 360° X-ray window Single-Crystal XRD at Low Temperature • Intensity ~10-6 off strongest Bragg Peak • Powder XRD not possible • E=100keV, 2•1011 photons/sec/mm2 BW5-HASYLAB 1 mm LBCO CGO

  3. High Pressure Beamline at NSLS-II • Single Crystal XRD • 4-Circle Diffractometer • Point Detector (2D Detector optional) • Low Temperature • Flux >1011–1012 photons/sec on Sample • DAC (MAC,Toroid) • Sample Centering • M. v. Zimmermann, HASYLAB • J. M. Tranquada, G. Xu, Neutron Scattering Group • Y. J. Kim, University of Toronto • B. Wells, University of Connecticut • D. J. Buttrey, University of Delaware • C. C. Kao, Z. Zhong, NSLS

  4. NSLS II Paris Edinburgh Cell Diamond Anvil Cell 100 mm3 30 GPa 25 kg low T not so easy 0.0001 mm3 100 GPa small beam sample position pressure inhomogeneous ISIS

  5. Pressure and Superconductivity Hg-1223 bulk LSCO bulk LSCO thin film buckled flat Bozovic et al. PRL 2002 Gao et al. PRB 1994 Yamada et al. JSSC 1989 Pressure: affects crystal structure and electronic band structure

  6. Competing order in LBCO single-crystal HXRD

  7. Charge Stripes under Pressure LTT structure Charge Stripes Do stripes survive in flat planes when x=1/8?

  8. Hole Crystallization in 2-Leg Ladder Sr14Cu24O41 Abbamonte et al. RSXS oxygen-K edge Blumberg et al. Science 2002 Rusydi et al. XRD: Zimmermann et al. PRB 2006

  9. Large Volume Pressure Cells for Single-Crystal X-ray Diffraction 4 GPa 3 GPa 7 GPa Mini Toroid Cell 1 cm 100keV 100keV NSLS/HASYLAB/NSLSII

  10. pressure cell: scattering/absorption pressure cell absorption: factor 10

  11. pressure sensor: CuGeO3 structural distortion at the spin Peierls transition at 14 K

  12. 100 keV beamline BW5 at HASYLAB, Hamburg E-range: 60-200 keV Crystal type: Si/TaSi2 (100”) Si1-xGex (15”–70”) Our Exp: 35” E-resolution: 600eV at 100keV Flux(photons/s): 2e11/mm2 @ 100keV (100mA, 4.5GeV) Spot size: 0.5mm x 0.5mm to 6mm x 6mm Detector: N2 cooled Ge det. Wiggler: 2Tesla, 17 periods

  13. Competing Order CePd2Si2 Lattice density (pressure) Charge density (doping)

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