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
22 papers · 1 filter
Modelling background charge rearrangements near single-electron transistors as a Poisson process
Heinz-Olaf Müller, Miha Furlan, Thomas Heinzel +1
Background charge rearrangements in metallic single-electron transistors are modelled in two-level tunnelling systems as a Poisson process with a scale parameter as only variable.…
Analysis of the temperature-dependent quantum point contact conductance in view of the metal-insulator transition in two dimensions
V. Senz, T. Heinzel, T. Ihn +5
The temperature dependence of the conductance of a quantum point contact has been measured. The conductance as a function of the Fermi energy shows temperature-independent fixed po…
Quasiparticle dynamics and gap structure in Hg1223 investigated with femtosecond spectroscopy
J. Demsar, R. Hudej, J. Karpinski +2
Measurements of the temperature dependence of the quasiparticle (QP) dynamics in Hg1223 with femtosecond time-resolved optical spectroscopy are reported. From the temperature depen…
Anomalous NMR Spin-Lattice Relaxation in SrB_{6} and Ca_{1-x}La_{x}B_{6}
J. L. Gavilano, Sh. Mushkolaj, D. Rau +4
We report the results of {11}B nuclear magnetic resonance (NMR) measurements of SrB_{6} and Ca_{0.995}La_{0.05}B_{6} below room temperature. Although the electrical resistivities o…
Critical currents, flux-creep activation energy and potential barriers for the vortex motion from the flux creep experiments
I. L. Landau, H. R. Ott
We present an experimental study of thermally activated flux creep in a superconducting ring-shaped epitaxial YBCO film as well as a new way of analyzing the experimental data. The…
Transport properties of quantum dots with hard walls
A. Fuhrer, S. Luescher, T. Heinzel +3
Quantum dots are fabricated in a Ga[Al]As-heterostructure by local oxidation with an atomic force microscope. This technique, in combination with top gate voltages, allows us to ge…
Single hole transistor in a p-Si/SiGe quantum well
U. Doetsch, U. Gennser, T. Heinzel +5
A single hole transistor is patterned in a p-Si/SiGe quantum well by applying voltages to nanostructured top gate electrodes. Gating is achieved by oxidizing the etched semiconduct…
Shot Noise by Quantum Scattering in Chaotic Cavities
S. Oberholzer, E. V. Sukhorukov, C. Strunk +4
We have experimentally studied shot noise of chaotic cavities defined by two quantum point contacts in series. The cavity noise is determined as 1/4*2e|I| in agreement with theory…
Spectroscopic evidence for unconventional superconductivity in UBe
Ch. Wälti, H. R. Ott, Z. Fisk +1
Reply to cond-mat/0007006 by Gloos
Large oxygen-isotope effect in Sr_{0.4}K_{0.6}BiO_{3}: Evidence for phonon-mediated superconductivity
Guo-meng Zhao, K. Conder, M. Angst +6
Oxygen-isotope effect has been investigated in a recently discovered superconductor Sr_{0.4}K_{0.6}BiO_{3}. This compound has a distorted perovskite structure and becomes supercond…
Thermal conductivity and specific heat of the linear chain cuprate SrCuO: Evidence for thermal transport via spinons
A. V. Sologubenko, E. Felder, K. Gianno +3
We report measurements of the specific heat and the thermal conductivity of the model Heisenberg spin-1/2 chain cuprate SrCuO at low temperatures. In addition to a near…
Reentrance of the induced diamagnetism in gold-niobium proximity cylinders
F. Bernd Mueller-Allinger, Ana Celia Mota
We discuss the magnetic response of gold-niobium proximity cylinders in the temperature range 100 μK<T<9 K. The temperature dependence of the susceptibility in the diamagnetic regi…
LiVGe2O6, an anomalous quasi 1D, system, as revealed by NMR
J. L. Gavilano, S. Mushkolaj, H. R. Ott +2
We report the results of Li nuclear magnetic resonance (NMR) studies of LiVGeO, a quasi one--dimensional spin model system, at low temperatures. Our data,…
Force-distance studies with piezoelectric tuning forks below 4.2 K
J. Rychen, T. Ihn, P. Studerus +5
Piezoelectric quartz tuning forks have been employed as the force sensor in a dynamic mode scanning force microscope operating at temperatures down to 1.7 K at He-gas pressures of…
Vortex melting and decoupling transitions in YBaCuO single crystals
X. G. Qiu, V. V. Moshchalkov, J. Karpinski
The vortex correlation along the c-axis in high quality single crystals of YBaCuO has been investigated as a function of temperature T in different magnetic field…
InAs-AlSb quantum wells in tilted magnetic fields
S. Brosig, K. Ensslin, A. G. Jansen +4
InAs-AlSb quantum wells are investigated by transport experiments in magnetic fields tilted with respect to the sample normal. Using the coincidence method we find for magnetic fie…
Analysis of the Metallic Phase of Two-Dimensional Holes in SiGe in Terms of Temperature Dependent Screening
V. Senz, T. Ihn, T. Heinzel +4
We find that temperature dependent screening can quantitatively explain the metallic behaviour of the resistivity on the metallic side of the so-called metal-insulator transition i…
Alkali specific effects in superconducting fullerides: the observation of a high temperature insulating phase in Na_2CsC_60
Natasa Cegar, Ferenc Simon, Slaven Garaj +5
Electron Spin Resonance and optical reflectivity measurements demonstrate a metal-insulator transition in Na_2CsC_60 as the system passes from the low temperature simple cubic to t…
Signatures of spin pairing in a quantum dot in the Coulomb blockade regime
S. Luescher, T. Heinzel, K. Ensslin +2
Coulomb blockade resonances are measured in a GaAs quantum dot in which both shape deformations and interactions are small. The parametric evolution of the Coulomb blockade peaks s…
Strong vortex pinning in the low-temperature superconducting phase of (U_1-xTh_x)Be_13
Ana Celia Mota, Elisabeth Dumont, James L. Smith
We have found a sharp transition at T_c2=350 mK in the vortex creep rate of a single crystal of (U_1-xTh_x)Be_13 with T_c=523 mK (x=0.0275). For T<<T_c2, no creep of vortices is ob…
Transition into a low temperature superconducting phase of unconventional pinning in Sr_2RuO_4
A. C. Mota, E. Dumont, A. Amann +1
We have found a sharp transition in the vortex creep rates at a temperature T^\ast=0.05 T_c in a single crystal of Sr_2RuO_4 (T_{c}=1.03 K) by means of magnetic relaxation measurem…
Unconventional strong pinning in the low temperature phase of U_.9725Th_.0275Be_13
Elisabeth Dumont, Ana Celia Mota, James L. Smith
We investigated low field vortex dynamics in a single crystal of U_.9725Th_.0275Be_13. We found a sharp transition in the vortex creep rate at the lower transition temperature T_c2…