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
19 papers · 1 filter
Operating a phase-locked loop controlling a high-Q tuning fork sensor for scanning force microscopy
T. Ihn, T. Vancura, A. Baumgartner +2
The implementation of a tuning fork sensor in a scanning force microscope operational at 300 mK is described and the harmonic oscillator model of the sensor is motivated. These sen…
High Magnetic Field NMR Studies of LiVGeO, a quasi 1-D Spin System
P. Vonlanthen, K. B. Tanaka, Atsushi Goto +12
We report Li pulsed NMR measurements in polycrystalline and single crystal samples of the quasi one-dimensional S=1 antiferromagnet LiVGeO, whose AF transition temper…
Temperature and field dependence of the anisotropy of MgB2
M. Angst, R. Puzniak, A. Wisniewski +5
The anisotropy gamma of the superconducting state of high quality single-crystals of MgB2 was determined, using torque magnetometry with two different methods. The anisotropy of th…
Transport signatures of correlated disorder in a two-dimensional electron gas
T. Heinzel, R. D. Jaeggi, E. Ribeiro +5
We report electronic transport measurements on two-dimensional electron gases in a Ga[Al]As heterostructure with an embedded layer of InAs self-assembled quantum dots. At high InAs…
Model of the mixed state of type-II superconductors in high magnetic fields
I. L. Landau, H. R. Ott
In superconductors with large values of the Ginzburg-Landau parameter, exposed to magnetic fields close to the upper critical field, the magnetic field is practically homogeneous a…
On the vortex motion in high temperature superconductors
I. L. Landau, H. R. Ott
We show that prominent features in voltage-current characteristics, recently measured in the mixed state of high-Tc superconductors and interpreted as evidence for an irreversibili…
Energy spectra of quantum rings
A. Fuhrer, S. Luescher, T. Ihn +4
Ring geometries have fascinated experimental and theoretical physicists over many years. Open rings connected to leads allow the observation of the Aharonov-Bohm effect, a paradigm…
Electronic properties of antidot lattices fabricated by atomic force lithography
A. Dorn, A. Fuhrer, T. Ihn +4
Antidot lattices were fabricated by atomic force lithography using local oxidation. High quality finite 20 x20 lattices are demonstrated with periods of 300 nm. The low temperature…
Heating of Two-Dimensional Holes in SiGe and the B = 0 Metal-Insulator Transition
R. Leturcq, D. L'Hote, R. Tourbot +6
We study the resistivity vs. electric field dependence of a 2D hole system in SiGe close to the B=0 metal-insulator transition. Using as a ``thermometer'' to obtain the…
Formation of a stable deacagonal quasicrystalline Al-Pd-Mn surface layer
D. Naumovic, P. Aebi, L. Schlapbach +4
We report the in situ formation of an ordered equilibrium decagonal Al-Pd-Mn quasicrystal overlayer on the 5-fold symmetric surface of an icosahedral Al-Pd-Mn monograin. The decago…
Analysis of the resistance in p-SiGe over a wide temperature range
V. Senz, T. Ihn, T. Heinzel +6
The temperature dependence of a system exhibiting a `metal-insulator transition in two dimensions at zero magnetic field' (MIT) is studied up to 90K. Using a classical scattering m…
Critical Currents and Order-Disorder Phase Transition in the Vortex States of YBa2Cu4O8 with Chemically Introduced Disorder
M. Angst, S. M. Kazakov, J. Karpinski +3
A series of YBa_{2-x}Sr_xCu_4O_8 single crystals was measured to study the influence of site disorder on the transition line Hss(T) between quasi-ordered vortex lattice and highly…
Anomalous NMR response of quasicrystalline icosahedral A_{72.4}Pd_{20.5}Mn_{7.1} at low temperatures
J. L. Gavilano, D. Rau, Sh. Mushkolaj +3
We report the observation of an anomalous {27}Al-NMR response of a single grain Al_{72.4}Pd_{20.5}Mn_{7.1} icosahedral quasicrystal at low temperatures. In an external magnetic fie…
Point defects, ferromagnetism and transport in calcium hexaboride
R. Monnier, B. Delley
The formation energy and local magnetic moment of a series of point defects in CaB are computed using a supercell approach within the generalized gradient approximation to den…
Doping dependence of the electrical and thermal transport properties of CaB6
K. Gianno', A. V. Sologubenko, H. R. Ott +2
The thermoelectric power S and the thermal conductivity k of stoichiometric and vacancy-doped CaB6 have been measured between 5 and 300 K. The thermopower of both materials is surp…
Heat transport by lattice and spin excitations in the spin chain compounds SrCuO_2 and Sr_2CuO_3
A. V. Sologubenko, K. Gianno, H. R. Ott +2
We present the results of measurements of the thermal conductivity of the quasi one-dimensional spin S=1/2 chain compound SrCuO_2 in the temperature range between 0.4 and 300 K alo…
Strong Electron-Phonon Coupling in Superconducting MgB: A Specific Heat Study
Ch. Wälti, E. Felder, C. Degen +4
We report on measurements of the specific heat of the recently discovered superconductor MgB in the temperature range between 3 and 220 K. Based on a modified Debye-Einstein mo…
Substitution effect of Zn and Cu in MgB2 on Tc and structure
S. M. Kazakov, M. Angst, J. Karpinski +2
The investigation of Zn substitution in MgB2 polycrystalline samples shows that about 0.1 Zn can be substituted in the structure of Mg deficient samples while it can not be substit…
The Hanbury Brown and Twiss Experiment with Fermions
S. Oberholzer, M. Henny, C. Strunk +4
We realized an equivalent Hanbury Brown and Twiss experiment for a beam of electrons in a two dimensional electron gas in the quantum Hall regime. A metallic split gate serves as a…