57 citations · 269 across the 13 of their papers we have counts for
14 papers
Superconductivity in metallic hydrogen
Dirk van der Marel, Christophe Berthod
Superconductivity, the lossless flow of electric current, occurs typically at very low temperatures. A possible exception is highly pressurized hydrogen, for which room temperature…
Brightened Optical Transition as Indicator of Multiferroicity in a Layered Antiferromagnet
Volodymyr Multian, Fan Wu, Dirk van der Marel +2
Two-dimensional van der Waals magnets show strong interconnection between their electrical, magnetic, and structural properties. Here we reveal the emergence of a luminescent trans…
Thermal and electrostatic tuning of surface phonon-polaritons in LaAlO3/SrTiO3 heterostructures
Yixi Zhou, Adrien Waelchli, Margherita Boselli +12
Phonon polaritons are promising for infrared applications due to a strong light-matter coupling and subwavelength energy confinement they offer. Yet, the spectral narrowness of the…
Reconciling scaling of the optical conductivity of cuprate superconductors with Planckian resistivity and specific heat
B. Michon, C. Berthod, C. W. Rischau +7
Materials tuned to a quantum critical point display universal scaling properties as a function of temperature and frequency . A long-standing puzzle regarding cuprate superc…
Propagation of shear stress in strongly interacting metallic Fermi liquids enhances transmission of terahertz radiation
D. Valentinis, J. Zaanen, D. van der Marel
A highlight of Fermi-liquid phenomenology, as explored in neutral He, is the observation that in the collisionless regime shear stress propagates as if one is dealing with the…
Electron spin resonance and exchange paths in the orthorhombic dimer system Sr2VO4
J. Deisenhofer, S. Schaile, J. Teyssier +9
We report on magnetization and electron spin resonance (ESR) measurements of SrVO with orthorhombic symmetry. In this dimer system the ions are in tetrahedral en…
BiOCuS: A new superconducting compound with oxypnictide - related structure
A. Ubaldini, E. Giannini, C. Senatore +1
The discovery of about 50 K superconductivity in the tetragonal Fe-based pnictides has stimulated the search for superconductivity in a wide class of materials with similar structu…
Experimental and First principle calculation of Co_xNi_{(1-x)}Si solid solution structural stability
J. Teyssier, R. Viennois, J. Salamin +2
We report the investigation of the structural stability of CoNiSi monosilicides for . As CoSi crystallizes in the FeSi-type structure (B20) and NiSi is stable…
Optical measurements of the superconducting gap in MgB2
B. Gorshunov, C. A. Kuntscher, P. Haas +6
Far-infrared reflectivity studies on the polycrystalline intermetallic compound MgB_2 with a superconducting transition temperature T_c=39 K were performed at temperatures 20 K to…
Infrared and optical spectroscopy of alpha and gamma-phase Ce
J. W. van der Eb, A. B. Kuz'menko, D. van der Marel
We determined the optical properties of alpha- and gamma-phase Ce in the photon energy range from 60 meV to 2.5 eV using ellipsometry and grazing incidence reflectometry. We observ…
Optical phonons in the reflectivity spectrum of FeSi
A. Damascelli, K. Schulte, D. van der Marel +2
We measured the reflectivity of a single crystal of FeSi from the far-infrared to the visible region (50-20000 wavenumber), varying the temperature between 4 and 300 K. The optical…
Penetration depth and conductivity of NbN and DyBa_2Cu_3O_7 thin films measured by mm-wave transmission
B. J. Feenstra, F. C. Klaassen, D. van der Marel +3
Using mm-wave transmission we obtain information about both the real and imaginary part of the dielectric function of superconducting thin films. This is done by fitting the Fabry-…
Long range Coulomb forces and the behaviour of the chemical potential of electrons in metals at a second order phase transition
D. van der Marel, D. I. Khomskii, G. M. Eliashberg
We give a general thermodynamic analyzis of the behaviour of the chemical potential of electrons in metals at a second order phase transition, including in our analysis the effect…
Weak coupling model for s*- and d-wave superconductivity
D. van der Marel
The phase diagram of the unconstrained model is calculated using the random phase approximation. It is found that the extended and the -channels are {\em not…