Publications de Ping-Hui Lin | EPFL Graph Search

Consequences of Broken Translational Symmetry in FeSexTe1-x

Marco Grioni, Luca Moreschini, Ping-Hui Lin, Davide Innocenti

We investigate the consequences of broken translational symmetry in the superconductor FeSexTe1-x using angle-resolved photoemission spectroscopy. We find that the intensity does not follow the periodicity dictated by the crystal structure, owing to the fo ...

Amer Physical Soc2014

Nature of the Bad Metallic Behavior of Fe1.06Te Inferred from Its Evolution in the Magnetic State

Marco Grioni, Ping-Hui Lin

We investigate with angle-resolved photoelectron spectroscopy the changes of the Fermi surface and the main bands from the paramagnetic state to the antiferromagnetic (AFM) state occurring below 72 K in Fe1.06Te. The evolution is completely different from ...

Amer Physical Soc2013

Spectroscopic Studies on Iron-Chalcogenide Superconductors

Ping-Hui Lin

Superconductivity in F-doped LaFeAsO, Tc= 26 K was first reported by Kamihara et al in 2008. Following that, more iron-based superconductors, e.g., (Ba,K)Fe2As2, LiFeAs, and Fe1+yTe1-xSex were discovered. The new class of high Tc superconductors have attra ...

EPFL2011

Measurement of Magnetic Excitations in the Two-Dimensional Antiferromagnetic Sr2CuO2Cl2 Insulator Using Resonant X-Ray Scattering: Evidence for Extended Interactions

Helmuth Berger, Marco Grioni, Bastien Dalla Piazza, Ping-Hui Lin, Peng Xu, Henrik Moodysson Rønnow, Marco Guarise, Thorsten Schmitt, Dirk Van der Marel

We measured the momentum dependence of magnetic excitations in the model spin-1/2 2D antiferromagnetic insulator Sr2CuO2Cl2 (SCOC). We identify a single-spin-wave feature and a multimagnon continuum, with different polarization dependences. The spin waves ...

American Physical Society2010

Evidence for core-hole-mediated inelastic x-ray scattering from metallic Fe1.087Te

Marco Grioni, Ping-Hui Lin, Henrik Moodysson Rønnow, Marco Guarise, Thorsten Schmitt, Dirk Van der Marel

We present a detailed analysis of resonant inelastic x-ray scattering from Fe1.087Te with unprecedented energy resolution. In contrast to the sharp peaks typically seen in insulating systems at the transition-metal L-3 edge, we observe spectra which show d ...

2010

Superconducting phase in the layered dichalcogenide 1T-TaS_{2} upon inhibition of the metal-insulator transition

Helmuth Berger, László Forró, Marco Grioni, Balazs Sipos, Julian Piatek, Ping-Hui Lin, Peng Xu, Henrik Moodysson Rønnow

When a Mott metal-insulator transition is inhibited by a small amount of disorder in the layered dichalcogenide 1T-TaS2, an inhomogeneous superconducting state arises below T=2.1 K and coexists with a nearly commensurate charge-density wave. By angle-resol ...

2010

Fermi surface determination from wavevector quantization in LaSrCuO films

Davor Pavuna, Claudia Cancellieri, Ping-Hui Lin

We have observed the wavevector quantization in LaSrCuO films thinner than 12 unit cells grown on SrTiO3 substrates. Low energy dispersions were determined in situ for different photon energies by angle resolved photoemission spectroscopy. From the wavevec ...

AIP American Institute of Physics2008

Embedded polytypes in Bi2Sr2-xLaxCuO6 thin films grown by laser ablation

Davor Pavuna, Claudia Cancellieri, Ping-Hui Lin

We investigate the presence of secondary phases in La-doped Bi-2201 thin films grown by laser ablation. The cation ratios in the target material, the oxygen pressure, and the substrate temperature during the deposition are the main parameters determining t ...

2007

Dopant rearrangement and superconductivity in Bi_2Sr_(2-x)La_xCuO_6 thin films under annealing

Davor Pavuna, Claudia Cancellieri, Ping-Hui Lin

2007

Self ordering of random intercalates in thin films of cprates superconductors: Growth model and x-ray diffraction diagnosis

Davor Pavuna, Claudia Cancellieri, Ping-Hui Lin

2007