Publications (18)
On the Chemistry and Physical Properties of Flux and Floating Zone Grown SmB6 Single Crystals
W. A. Phelan, S. M. Koohpayeh, P. Cottingham +8
Recent theoretical and experimental findings suggest that the long-known but not well understood low temperature resistance plateau of SmB6 may originate from protected surface sta…
A dual-band millimeter-wave kinetic inductance camera for the IRAM 30-meter telescope
A. Monfardini, A. Benoit, A. Bideaud +22
Context. The Neel IRAM KIDs Array (NIKA) is a fully-integrated measurement system based on kinetic inductance detectors (KIDs) currently being developed for millimeter wave astrono…
Non linear flux flow in TiN superconducting thin film
F. Lefloch, C. Hoffmann, O. Demolliens
We have studied the superconducting behavior of 100 nm Titanium Nitride (TiN) thin film in a perpendicular magnetic field. We found a zero field transition temperature of 4.6 K and…
In-situ measurement of the permittivity of helium using microwave NbN resonators
G. J. Grabovskij, L. J. Swenson, O. Buisson +3
By measuring the electrical transport properties of superconducting NbN quarter-wave resonators in direct contact with a helium bath, we have demonstrated a high-speed and spatiall…
Soft antiphase tilt of oxygen octahedra in the hybrid improper multiferroic Ca3Mn1.9Ti0.1O7
Feng Ye, Jinchen Wang, Jieming Sheng +13
We report a single crystal neutron and x-ray diffraction study of the hybrid improper multiferroic Ca3Mn1.9Ti0.1O7 (CMTO), a prototypical system where the electric polarization ari…
Shot-noise and conductance measurements of transparent superconductor / two-dimensional electron gas junctions
B. -R. Choi, A. E. Hansen, T. Kontos +6
We have measured the conductance and shot-noise of superconductor-normal metal (S-N) junctions between a Niobium (Nb) film and a 2-dimensional electron gas (2DEG), formed in an InA…
Carrier relaxation, pseudogap, and superconducting gap in high-Tc cuprates: A Raman scattering study
M. Opel, R. Nemetschek, C. Hoffmann +9
We describe results of electronic Raman-scattering experiments in differently doped single crystals of Y-123 and Bi-2212. The comparison of AF insulating and metallic samples sugge…
NIKA: A millimeter-wave kinetic inductance camera
A. Monfardini, L. J. Swenson, A. Bideaud +18
Current generation millimeter wavelength detectors suffer from scaling limits imposed by complex cryogenic readout electronics. To circumvent this it is imperative to investigate t…
Mesoscopic transition in the shot noise of diffusive S/N/S junctions
C. Hoffmann, F. Lefloch, M. Sanquer +1
We experimentally investigated the current noise in diffusive Superconductor/Normal metal/Superconductor junctions with lengths between the superconducting coherence length xi_Delt…
Mesoscopic proximity effect in double barrier Superconductor/Normal Metal junctions
D. Quirion, C. Hoffmann, F. Lefloch +1
We report transport measurements down to T=60mK of SININ and SNIN structures in the diffusive limit. We fabricated Al-AlOx/Cu/AlOx/Cu (SININ) and Al/Cu/AlOx/Cu (SNIN) vertical junc…
Enhanced Electron-Phonon Coupling and its Irrelevance to High T Superconductivity
T. P. Devereaux, A. Virosztek, A. Zawadowski +10
It is argued that the origin of the buckling of the CuO planes in certain cuprates as well as the strong electron-phonon coupling of the phonon is due to the electri…
Molecular states in carbon nanotube double quantum dots
M. R. Graeber, W. A. Coish, C. Hoffmann +5
We report electrical transport measurements through a semiconducting single-walled carbon nanotube (SWNT) with three additional top-gates. At low temperatures the system acts as a…
Collinear antiferromagnetic order in URuSiP revealed by neutron diffraction
M. C. Rahn, A. Gallagher, F. Orlandi +5
The hidden order phase in URuSi is highly sensitive to electronic doping. A special interest in silicon-to-phosphorus substitution is due to the fact that it may allow one,…
Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions
F. Lefloch, C. Hoffmann, M. Sanquer +1
We performed low temperature shot noise measurements in Superconductor (TiN) - strongly disordered normal metal (heavily doped Si) weakly transparent junctions. We show that the co…
Inelastic relaxation and noise temperature in S/N/S junctions
C. Hoffmann, F. Lefloch, M. Sanquer
We studied electronic relaxation in long diffusive superconductor / normal metal / superconductor (S/N/S) junctions by means of current noise and transport measurements down to ver…
Single crystal growth of Cu4(OH)6BrF and universal behavior in quantum spin liquid candidates synthetic barlowite and herbertsmithite
C. M. Pasco, B. A. Trump, Thao T. Tran +5
Synthetic barlowite, Cu4(OH)6BrF, has emerged as a new quantum spin liquid (QSL) host, containing kagome layers of S=1/2 Cu2+ ions separated by interlayer Cu2+ ions. Similar to syn…
On-orbit Performance of the Solar Optical Telescope aboard Hinode
K. Ichimoto, Y. Katsukawa, T. Tarbell +8
On-orbit performance of the Solar Optical Telescope (SOT) aboard Hinode is described with some attentions on its unpredicted aspects. In general, SOT revealed an excellent performa…
Extreme events in near integrable lattices
C. Hoffmann, E. G. Charalampidis, D. J. Frantzeskakis +1
In the present work, we examine the potential robustness of extreme wave events associated with large amplitude fluctuations of the Peregrine soliton type, upon departure from the…