2.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- ETH ZurichCH630 papers
- Paul Scherrer InstituteCH136 papers
- École Polytechnique Fédérale de LausanneCH61 papers
- University of ZurichCH45 papers
- University of RegensburgDE44 papers
- Institute of PhysicsPL39 papers
- Centre National de la Recherche ScientifiqueFR37 papers
- Swiss Light Source37 papers
- Polish Academy of SciencesPL36 papers
- P.L. Kapitza Institute for Physical ProblemsRU26 papers
- National Institute for Materials ScienceJP25 papers
- University of GenevaCH23 papers
24 papers · 1 filter
Anomalies in the Fermi surface and band dispersion of quasi-one-dimensional CuO chains in the high-temperature superconductor YBa2Cu4O8
Takeshi Kondo, R. Khasanov, J. Karpinski +12
We have investigated the electronic states in quasi one dimensional (1D) CuO chains by microprobe Angle Resolved Photoemission Spectroscopy. We find that the quasiparticle Fermi su…
Distribution of NMR relaxations in a random Heisenberg chain
T. Shiroka, F. Casola, V. Glazkov +4
Nuclear magnetic resonance (NMR) measurements of the 29Si spin-lattice relaxation time T1 were used to probe the spin-1/2 random Heisenberg chain compound BaCu2(Si(1-x)Gex)2O7. Rem…
Sub-linear radiation power dependence of photo-excited resistance oscillations in two-dimensional electron systems
Jesus Inarrea, R. G. Mani, W. Wegscheider
We find that the amplitude of the radiation-induced magnetoresistance oscillations in GaAs/AlGaAs system grows nonlinearly as where is the amplitude an…
Coupling molecular spin states by photon-assisted tunneling
L. R. Schreiber, F. R. Braakman, T. Meunier +5
Artificial molecules containing just one or two electrons provide a powerful platform for studies of orbital and spin quantum dynamics in nanoscale devices. A well-known example of…
Tuning the superconducting and magnetic properties in Fe_ySe_0.25Te_0.75 by varying the Fe-content
M. Bendele, P. Babkevich, S. Katrych +7
The superconducting and magnetic properties of FeSeTe single crystals () were studied by means of x-ray diffraction, SQUID magnetometry,…
Strong coupling between Eu2+ spins and Fe2As2 layers in EuFe1.9Co0.1As2 observed with NMR
Z. Guguchia, J. Roos, A. Shengelaya +8
A combination of x-ray diffraction, magnetization, and 75As nuclear magnetic resonance (NMR) experiments were performed on single-crystal EuFe1.9Co0.1As2. The strength of the hyper…
Local quasiparticle density of states of superconducting SmFeAsOF single crystals: Evidence for spin-mediated pairing
Y. Fasano, I. Maggio-Aprile, N. D. Zhigadlo +3
We probe the local quasiparticles density-of-states in micron-sized SmFeAsOF single-crystals by means of Scanning Tunnelling Spectroscopy. Spectral features resemble…
Anisotropic charge dynamics in detwinned Ba(FeCo)As
A. Dusza, A. Lucarelli, F. Pfuner +3
We investigate the optical conductivity as a function of temperature with light polarized along the in-plane orthorhombic - and -axes of Ba(FeCo)As for $x…
Local investigation of the energy gap within the incompressible strip in the quantum Hall regime
E. V. Deviatov, A. Lorke, G. Biasiol +2
We experimentally study the energy gap within the incompressible strip at local filling factor at the quantum Hall edge for samples of very different mobilities. The obtain…
Structural phase transition and superlattice misfit strain of RFeAsO (R = La, Pr, Nd and Sm)
Alessandro Ricci, Nicola Poccia, B. Joseph +9
The tetragonal-to-orthorhombic structural phase transition (SPT) in LaFeAsO (La-1111) and SmFeAsO (Sm-1111) single crystals measured by high resolution x-ray diffraction is found t…
Electronic correlations in iron-pnictide superconductors and beyond; what can we learn from optics
L. Degiorgi
The Coulomb repulsion, impeding electrons' motion, has an important impact on the charge dynamics. It mainly causes a reduction of the effective metallic Drude weight (proportional…
Microscopic Study of the Superconducting State of the Iron Pnictide RbFe_2As_2
Z. Shermadini, J. Kanter, C. Baines +9
A study of the temperature and field dependence of the penetration depth λof the superconductor RbFe_2As_2 (T_c=2.52 K) was carried out by means of muon-spin rotation measurements.…
Measurement of spin-dependent conductivities in a two-dimensional electron gas
H. Ebrahimnejad, Y. Ren, S. M. Frolov +3
Spin accumulation is generated by injecting an unpolarized charge current into a channel of GaAs two-dimensional electron gas subject to an in-plane magnetic field, then measured i…
Imaging Localized States in Graphene Nanostructures
S. Schnez, J. Güttinger, M. Huefner +3
Probing techniques with spatial resolution have the potential to lead to a better understanding of the microscopic physical processes and to novel routes for manipulating nanostruc…
Spatially resolved ultrafast transport current in GaAs photoswitches
L. Prechtel, S. Manus, D. Schuh +2
We apply a pump- and probe-scheme to coplanar stripline circuits to investigate the photocurrent response of GaAs photoswitches in time and space. We find a displacement current pu…
Zero-bias Anomaly of Quantum Point Contacts in the Low-Conductance Limit
Y. Ren, W. W. Yu, S. M. Frolov +2
Most quantum point contacts (QPCs) fabricated in high-mobility 2D electron gases show a zero-bias conductance peak near pinchoff, but the origin of this peak remains a mystery. Pre…
Charge dynamics of the Co-doped BaFeAs
A. Lucarelli, A. Dusza, F. Pfuner +5
We report on a thorough optical investigation over a broad spectral range and as a function of temperature of the charge dynamics in Ba(CoFe)As compounds for Co…
Anisotropic superconducting properties of single-crystalline FeSe0.5Te0.5
M. Bendele, S. Weyeneth, R. Puzniak +9
Iron-chalcogenide single crystals with the nominal composition FeSeTe and a transition temperature of K were synthesized by the Bridgman method. T…
Temperature dependence of the excitation spectrum in the charge-density-wave ErTe and HoTe systems
F. Pfuner, P. Lerch, J. -H. Chu +3
We provide optical reflectivity data collected over a broad spectral range and as a function of temperature on the ErTe and HoTe materials, which undergo two consecutive ch…
The trap DOS in small molecule organic semiconductors: A quantitative comparison of thin-film transistors with single crystals
Wolfgang L. Kalb, Simon Haas, Cornelius Krellner +2
We show that it is possible to reach one of the ultimate goals of organic electronics: producing organic field-effect transistors with trap densities as low as in the bulk of singl…
Observation of excited states in a graphene double quantum dot
F. Molitor, H. Knowles, S. Dröscher +8
We study a graphene double quantum dot in different coupling regimes. Despite the strong capacitive coupling between the dots, the tunnel coupling is below the experimental resolut…
Selective Chemical Modification of Graphene surfaces: Distinction between Single and Bilayer Graphene
Fabian M. Koehler, Arnhild Jacobsen, Klaus Ensslin +2
Graphene modifications with oxygen or hydrogen are well known in contrast to carbon attachment to the graphene lattice. The chemical modification of graphene sheets with aromatic d…
Quasiparticle relaxation dynamics in spin-density-wave and superconducting SmFeAsO_{1-x}F_{x} single crystals
T. Mertelj, P. Kusar, V. V. Kabanov +7
We investigate the quasiparticle relaxation and low-energy electronic structure in undoped SmFeAsO and near-optimally doped SmFeAsO_{0.8}F_{0.2} single crystals - exhibiting spin-d…
Electron-avalanche amplifier based on the electronic Venturi effect
D. Taubert, G. J. Schinner, H. P. Tranitz +4
Scattering of otherwise ballistic electrons far from equilibrium is investigated in a cold two-dimensional electron system. The interaction between excited electrons and the degene…