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
27 papers · 1 filter
Optical investigation of the charge-density-wave phase transitions in
A. Perucchi, L. Degiorgi, R. E. Thorne
We have measured the optical reflectivity of the quasi one-dimensional conductor from the far infrared up to the ultraviolet between 10 and 300 using light po…
Electronic transport in EuB
G. A. Wigger, R. Monnier, H. R. Ott +2
EuB is a magnetic semiconductor in which defects introduce charge carriers into the conduction band with the Fermi energy varying with temperature and magnetic field. We presen…
Point-Contact Spectroscopy in MgB_2: from Fundamental Physics to Thin-Film Characterization
R. S. Gonnelli, D. Daghero, A. Calzolari +9
In this paper we highlight the advantages of using point-contact spectroscopy (PCS) in multigap superconductors like MgB_2, both as a fundamental research tool and as a non-destruc…
Interplay between Freezing and Superconductivity in the Optimally Doped LaEu0.20Sr0.15CuO4 under Hydrostatic Pressure
B. Simovic, M. Nicklas, P. C. Hammel +3
We study the electronic properties of a LaEu0.20Sr0.15CuO4 single crystal under hydrostatic pressure up to 2.9 GPa. Both the freezing of the Cu 3d moments and the structural transi…
Infrared optical properties of the spin-1/2 quantum magnet
G. Caimi, L. Degiorgi, N. N. Kovaleva +2
We report results on the electrodynamic response of , a low-dimensional spin-1/2 quantum magnet that shows a spin gap formation for T= 67 . The Fano-like shape o…
Magneto-optical Kerr effect in
G. Caimi, S. Broderick, H. R. Ott +3
We have measured the magneto-optical Kerr rotation of ferromagnetic with x=0.2 and 0.4, as well as of serving as the non-magnetic reference material…
The Magnetic-field Dependence of the Gaps in a Two-band Superconductor: A Point-contact Study of MgB_2 Single Crystals
R. S. Gonnelli, D. Daghero, A. Calzolari +6
We present the results of directional point-contact measurements in MgB_2 single crystals, in magnetic fields up to 9 T parallel to the c axis. By fitting the conductance curves of…
Kelvin Probe Spectroscopy of a Two-Dimensional Electron Gas Below 300 mK
T. Vancura, S. Kicin, T. Ihn +3
A scanning force microscope with a base temperature below 300 mK is used for measuring the local electron density of a two-dimensional electron gas embedded in an Ga[Al]As heterost…
Unconventional Charge Ordering in Na0.70CoO2 below 300 K
J. L. Gavilano, D. Rau, B. Pedrini +4
We present the results of measurements of the dc-magnetic susceptibility chi(T) and the 23Na-NMR response of Na_{0.70}CoO_{2} at temperatures between 50 and 340 K. The chi(T) data…
Giant phonon anomalies in the pseudo-gap phase of TiOCl
P. Lemmens, K. Y. Choi, G. Caimi +4
We report infrared and Raman spectroscopy results of the spin-1/2 quantum magnet TiOCl. Giant anomalies are found in the temperature dependence of the phonon spectrum, which hint t…
Optical evidence for a spin-filter effect in the charge transport of
A. Perucchi, G. Caimi, H. R. Ott +3
We have measured the optical reflectivity of as a function of temperature between 1.5 and 300 and in external magnetic fields up to 7 . The sl…
Diffusive energy transport in the S=1 Haldane chain compound AgVP2S6
A. V. Sologubenko, S. M. Kazakov, H. R. Ott +2
We present the results of measurements of the thermal conductivity of the spin S=1 chain compound AgVP_2S_6 in the temperature range between 2 and 300 K and with the heat flow…
Unusual magnetic field-induced phase transition in the mixed state of superconducting NbSe2
A. V. Sologubenko, I. L. Landau, H. R. Ott +3
The thermal conductivity κin the basal plane of single-crystalline hexagonal NbSe2 has been measured as a function of magnetic field H, oriented both along and perpendicular to the…
Phonon scattering in quasicrystalline i-Al_{72}Pd_{19.5}Mn_{8.5}: A study of the low-temperature thermal conductivity
A. Bilusic, A. Smontara, J. Dolinsek +3
We measured the thermal conductivity of an icosahedral quasicrystal i-Al_{72}Pd_{19.5}Mn_{8.5} in the temperature range between 0.4 K and 300 K. The analysis of the low-temperature…
Absence of a boron isotope effect in the magnetic penetration depth of MgB
D. Di Castro, M. Angst, D. G. Eshchenko +11
The magnetic penetration depth in polycrystalline MgB for different boron isotopes (B/B) was investigated by transverse field muon spin rotation. No boro…
Field-induced charge transport at the surface of pentacene single crystals: a method to study charge dynamics of 2D electron systems in organic crystals
J. Takeya, C. Goldmann, S. Haas +3
A method has been developed to inject mobile charges at the surface of organic molecular crystals, and the DC transport of field-induced holes has been measured at the surface of p…
Prepyramid-to-pyramid transition of SiGe islands on Si(001)
A. Rastelli, H. von Kaenel, B. J. Spencer +1
The morphology of the first three-dimensional islands appearing during strained growth of SiGe alloys on Si(001) was investigated by scanning tunneling microscopy. High resolution…
Ambivalence of the anisotropy of the vortex lattice in an anisotropic type-II superconductor
I. L. Landau, A. V. Sologubenko, H. R. Ott
We present a geometry-based discussion of possible vortex configurations in the mixed state of anisotropic type-II superconductors. It is shown that, if energy considerations assig…
Directional point-contact spectroscopy of MgB2 single crystals in magnetic fields: two-band superconductivity and critical fields
R. S. Gonnelli, D. Daghero, G. A. Ummarino +6
The results of the first directional point-contact measurements in MgB2 single crystals, in the presence of magnetic fields up to 9 T either parallel or perpendicular to the ab pla…
Effects of proton irradiation and ageing on the superconducting properties of single crystalline and polycrystalline MgB2
G. K. Perkins, Y. Bugoslavsky, A . D. Caplin +7
We present magnetisation data on crystalline and polycrystalline MgB2 before and after irradiation with ~1MeV protons. In the virgin crystal the critical current density is below o…
Anisotropic properties of MgB2 by torque magnetometry
M. Angst, D. Di Castro, R. Puzniak +6
Anisotropic properties of superconducting MgB2 obtained by torque magnetometry are compared to theoretical predictions, concentrating on two issues. Firstly, the angular dependence…
Single crystal growth and properties of MgB2 and Mg(B1-xCx)2
S. M. Kazakov, J. Karpinski, J. Jun +4
Single crystals of MgB2 and Mg(B1-xCx)2 have been grown using cubic anvil technique. Tc values vary in a wide range (39-9 K) with carbon content varying from 0 up to 16%. Using SiC…
Determination of the Fermi Surface of MgB by the de Haas-van Alphen effect
A. Carrington, P. J. Meeson, J. R. Cooper +8
We report measurements of the de Haas-van Alphen effect for single crystals of MgB, in magnetic fields up to 32 Tesla. In contrast to our earlier work, dHvA orbits from all fou…
Inhomogeneous magnetism in decagonal AlPdMn
D. Rau, J. L. Gavilano, Sh. Mushkolaj +3
We report the results of measurements of Al and Mn NMR spectra, the related spin-lattice relaxation rates, and the dc magnetic susceptibility of the stable decagonal…