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
33 papers · 1 filter
Calculating the trap density of states in organic field-effect transistors from experiment: A comparison of different methods
Wolfgang L. Kalb, Bertram Batlogg
The spectral density of localized states in the band gap of pentacene (trap DOS) was determined with a pentacene-based thin-film transistor from measurements of the temperature dep…
Influence of carbon on intraband scattering in Mg(B1-xCx)2
M. Matusiak, K. Rogacki, N. D. Zhigadlo +1
We report data on the Hall coefficient (RH) of the carbon substituted Mg(B1-xCx)2 single crystals with x in the range from 0 to 0.1. The temperature dependences of RH obtained for…
Asymmetric non-linear response of the IQHE
A. Siddiki, J. Horas, D. Kupidura +2
An asymmetric break-down of the integer quantized Hall effect is investigated. This rectification effect is observed as a function of the current value and its direction in conjunc…
Low-voltage organic transistors and inverters with ultra-thin fluoropolymer gate dielectric
M. P. Walser, W. L. Kalb, T. Mathis +1
We report on the simple fabrication of hysteresis-free and electrically stable organic field-effect transistors (OFETs) and inverters operating at voltages <1-2 V, enabled by the a…
Field Dependent Superfluid Density in the Optimally Doped SmFeAsO_(1-x)F_y Superconductor
S. Weyeneth, M. Bendele, R. Puzniak +9
The magnetic field dependence of the in-plane magnetic penetration depth for optimally doped SmFeAsO_(1-x)F_y was investigated by combining torque magnetometry, SQUID magnetometry,…
Non-equilibrium Fluctuation Relations in a Quantum Coherent Conductor
Shuji Nakamura, Yoshiaki Yamauchi, Masayuki Hashisaka +8
We experimentally demonstrate the validity of non-equilibrium fluctuation relations by using a quantum coherent conductor. In equilibrium the fluctuation-dissipation relation leads…
Asymmetric Franck-Condon factors in suspended carbon nanotube quantum dots
Fabio Cavaliere, Eros Mariani, Renaud Leturcq +2
Electronic states and vibrons in carbon nanotube quantum dots have in general different location and size. As a consequence, the conventional Anderson-Holstein model, coupling vibr…
Nernst effect in single crystals of the pnictide superconductor CaFe1.92Co0.08As2 and parent compound CaFe2As2
M. Matusiak, Z. Bukowski, J. Karpinski
We report a combined study of the Nernst coefficient (v), Hall effect and thermoelectric power of CaFe2As2 and CaFe1.92Co0.08As2 single crystals. The absolute value of v in both sa…
Nanoepitaxy on quasicrystal surfaces
Mehmet Erbudak, Muhittin Mungan, Sven Burkardt
In film growth on quasicrystalline surfaces, the epitaxy-imposed ordering cannot compete with the stable bulk phases of thick films due to absence of translational order in the str…
Nuclear Polarization in Quantum Point Contacts in an In-Plane Magnetic Field
Y. Ren, W. Yu, S. M. Frolov +2
Nuclear spin polarization is typically generated in GaAs quantum point contacts (QPCs) when an out-of-plane magnetic field gives rise to spin-polarized quantum Hall edge states, an…
Phonon-mediated vs. Coulombic Back-Action in Quantum Dot circuits
D. Harbusch, D. Taubert, H. P. Tranitz +2
Quantum point contacts (QPCs) are commonly employed to capacitively detect the charge state of coupled quantum dots (QD). An indirect back-action of a biased QPC onto a double QD l…
Bulk Superconductivity at 2.6 K in Undoped RbFe_2As_2
Z. Bukowski, S. Weyeneth, R. Puzniak +2
The iron arsenide RbFe_2As_2 with the ThCr_2Si_2-type structure is found to be a bulk superconductor with T_c=2.6 K. The onset of diamagnetism was used to estimate the upper critic…
Raman scattering evidence for a cascade-like evolution of the charge-density-wave collective amplitude mode
M. Lavagnini, H. -M. Eiter, L. Tassini +6
The two-dimensional rare-earth tri-tellurides undergo a unidirectional charge-density-wave (CDW) transition at high temperature and, for the heaviest members of the series, a bidir…
Anomalous magnetotransport and cyclotron resonance of high mobility magnetic 2DHGs in the quantum Hall regime
U. Wurstbauer, S. Knott, C. G. v. Westarp +5
Low temperature magnetotransport measurements and far infrared transmission spectroscopy are reported in molecular beam epitaxial grown two-dimensional hole systems confined in str…
Engineering ultralong spin coherence in two-dimensional hole systems at low temperatures
T. Korn, M. Kugler, M. Griesbeck +7
For the realisation of scalable solid-state quantum-bit systems, spins in semiconductor quantum dots are promising candidates. A key requirement for quantum logic operations is a s…
Evidence of a magnetic Bose glass in IPA-Cu(Cl0.95Br0.05)3 from neutron diffraction
Tao Hong, A. Zheludev, H. Manaka +1
We report the single crystal study of the bulk magnetization and neutron scattering measurements on a quantum S=1/2 spin ladders system IPA-Cu(Cl0.95Br0.05)3with quenched disorder.…
Inelastic X-ray Scattering Study of superconducting SmFeAs(OF) Single Crystals: Evidence for Strong Momentum-Dependent Doping-Induced Renormalizations of Optical Phonons
M. Le Tacon, T. R. Forrest, Ch. Rüegg +10
We report inelastic x-ray scattering experiments on the lattice dynamics in SmFeAsO and superconducting SmFeAsOF single crystals. Particular attention was paid to…
Optical Properties of TiN Thin Films close to the Superconductor-Insulator Transition
F. Pfuner, L. Degiorgi, T. I. Baturina +2
We present the intrinsic optical properties over a broad spectral range of TiN thin films deposited on a Si/SiO substrate. We analyze the measured reflectivity spectra of the f…
Evidence for localization and 0.7 anomaly in hole quantum point contacts
Y. Komijani, M. Csontos, I. Shorubalko +5
Quantum point contacts implemented in p-type GaAs/AlGaAs heterostructures are investigated by low-temperature electrical conductance spectroscopy measurements. Besides one-dimensio…
Pressure-induced lattice instabilities and superconductivity in YBa2Cu4O8 and optimally doped YBa2Cu3O7-δ
M. Calamiotou, A. Gantis, E. Siranidi +3
Combined synchrotron angle-dispersive powder diffraction and micro-Raman spectroscopy are used to investigate the pressure-induced lattice instabilities that are accompanied by T$_…
Acoustoelectric effects in very high-mobility -SiGe/Ge/SiGe heterostructure
I. L. Drichko, A. M. Diakonov, E. V. Lebedeva +4
Measurement results of the acoustoelectric effects (surface acoustic waves (SAW) attenuation and velocity) in a high-mobility -SiGe/Ge/SiGe structure are presented. The structur…
Muon-spin rotation measurements of the penetration depth of the Mo_3Sb_7 superconductor
R. Khasanov, P. W. Klamut, A. Shengelaya +4
Measurements of the magnetic field penetration depth λin superconductor Mo_3Sb_7 (T_c~2.1 K) were carried out by means of muon-spin-rotation. The absolute values of λ, the Ginzburg…
Graphene quantum dots in perpendicular magnetic fields
J. Guettinger, C. Stampfer, T. Frey +2
We report transport experiments on graphene quantum dots. We focus on excited state spectra in the near vicinity of the charge neutrality point and signatures of the electron-hole…
Transport through graphene double dots
F. Molitor, S. Dröscher, J. Güttinger +4
We present Coulomb blockade measurements in a graphene double dot system. The coupling of the dots to the leads and between the dots can be tuned by graphene in-plane gates. The co…