Publications (50)
Unusual interplay between superconductivity and field-induced charge order in YBa2Cu3Oy
J. Kacmarcik, I. Vinograd, B. Michon +12
We present a detailed study of the temperature (T) and magnetic field (H) dependence of the electronic density of states (DOS) at the Fermi level, as deduced from specific heat and…
Detection of hydrogen fluoride absorption in diffuse molecular clouds with Herschel/HIFI: a ubiquitous tracer of molecular gas
P. Sonnentrucker, D. A. Neufeld, T. G. Phillips +47
We discuss the detection of absorption by interstellar hydrogen fluoride (HF) along the sight line to the submillimeter continuum sources W49N and W51. We have used Herschel's HIFI…
Upper and lower critical fields in NdFeAs(O,F) single crystals : a study by Hall probe magnetization and specific heat
Z. Pribulova, T. Klein, J. Kacmarcik +5
The upper and lower critical fields have been deduced from specific heat and Hall probe magnetization measurements in non-optimally doped NdFeAs(O,F) single crystals ($T_c \sim 32-…
Specific-heat measurements of superconducting NbS2 single crystal in an external magnetic field: Study on the energy gap structure
J. Kacmarcik, Z. Pribulova, C. Marcenat +4
The heat capacity of a 2H-NbS2 single crystal has been measured by a highly sensitive ac technique down to 0.6 K and in magnetic fields up to 14 T. At very low temperatures data sh…
Point-contact spectroscopy of MgB2
P. Samuely, P. Szabo, J. Kacmarcik +2
Point-contact spectroscopy measurements on magnesium diboride reveal the existence of two superconducting energy gaps closing at the same transition temperature in line with the mu…
First results on Martian carbon monoxide from Herschel/HIFI observations
P. Hartogh, M. I. BÅÄcka, C. Jarchow +48
We report on the initial analysis of Herschel/HIFI carbon monoxide (CO) observations of the Martian atmosphere performed between 11 and 16 April 2010. We selected the (7-6) rotatio…
Anisotropy of the Upper Critical Field and Critical Current in Single Crystal MgB
L. Lyard, P. Samuely, P. Szabo +15
We report on specific heat, high magnetic field transport and susceptibility measurements on magnesium diboride single crystals. The upper critical field for magnetic…
Thermodynamic phase diagram of Fe(SeTe) single crystals up to 28 Tesla
T. Klein, D. Braithwaite, A. Demuer +8
We report on specific heat (), transport, Hall probe and penetration depth measurements performed on Fe(SeTe) single crystals ( K). The thermodyna…
Circuit Quantum Electrodynamics of Granular Aluminum Resonators
N. Maleeva, L. Grünhaupt, T. Klein +12
The introduction of crystalline defects or dopants can give rise to so-called "dirty superconductors", characterized by reduced coherence length and quasiparticle mean free path. I…
Superconducting Transition and Phase Diagram of Single Crystal MgB2
U. Welp, G. Karapetrov, W. K. Kwok +10
The superconducting phase diagram of MgB2 was determined from magnetization, magneto-transport and the first single-crystal specific heat measurements. A zero-temperature in-plane…
Specific Heat of the Kagome Antiferromagnet Herbertsmithite in High Magnetic Fields
Q. Barthélemy, A. Demuer, C. Marcenat +7
Measuring the specific heat of herbertsmithite single crystals in high magnetic fields (up to T) allows us to isolate the low-temperature kagome contribution while shifting aw…
Superconducting energy gap in MgCNi3 single crystals: Point-contact spectroscopy and specific-heat measurements
Z. Pribulova, J. Kacmarcik, C. Marcenat +9
Specific heat has been measured down to 600 mK and up to 8 Tesla by the highly sensitive AC microcalorimetry on the MgCNi3 single crystals with Tc ~ 7 K. Exponential decay of the e…
Type II superconductivity in SrPd2Ge2
T. Samuely, P. Szabó, Z. Pribulová +6
Previous investigations have shown that SrPd2Ge2, a compound isostructural with "122" iron pnictides but iron- and pnictogen-free, is a conventional superconductor with a single s-…
Gas morphology and energetics at the surface of PDRs: new insights with Herschel observations of NGC 7023
C. Joblin, P. Pilleri, J. Montillaud +37
We investigate the physics and chemistry of the gas and dust in dense photon-dominated regions (PDRs), along with their dependence on the illuminating UV field. Using Herschel-HIFI…
Electrodynamics of granular aluminum from superconductor to insulator: observation of collective superconducting modes
F. Levy-Bertrand, T. Klein, T. Grenet +14
We report on a detailed study of the optical response and phase diagram ( being the superconducting critical temperature and the normal state resistivity of the…
Strong CH+ J=1-0 emission and absorption in DR21
E. Falgarone, V. Ossenkopf, M. Gerin +30
We report the first detection of the ground-state rotational transition of the methylidyne cation CH+ towards the massive star-forming region DR21 with the HIFI instrument onboard…
Anisotropies of the lower and upper critical fields in MgB single crystals
L. Lyard, P. Szabo, T. Klein +6
The temperature dependence of the London penetration depth () and coherence length () has been deduced from Hall probe magnetization measurements in high quality MgB si…
Tunable sub-gap radiation detection with superconducting resonators
O. Dupré, A. Benoît M. Calvo, A. Catalano +7
We have fabricated planar amorphous Indium Oxide superconducting resonators ( K) that are sensitive to frequency-selective radiation in the range of 7 to 10 GHz. Those…
Normal state specific heat in the cuprates LaSrCuO and BiSrLaCuO near the critical point of the pseudogap phase
C. Girod, D. LeBoeuf, A. Demuer +17
The specific heat of the cuprate superconductors LaSrCuO and BiSrLaCuO was measured at low temperature (down to ), f…
HIFI observations of warm gas in DR21: Shock versus radiative heating
V. Ossenkopf, M. Röllig, R. Simon +35
The molecular gas in the DR21 massive star formation region is known to be affected by the strong UV field from the central star cluster and by a fast outflow creating a bright sho…
A Bragg glass phase in the vortex lattice of a type II superconductor
T. Klein, I. Joumard, S. Blanchard +4
Although crystals are usually quite stable, they are sensitive to a disordered environment: even an infinitesimal amount of impurities can lead to the destruction of the crystallin…
A Race Track Trapped-Ion Quantum Processor
S. A. Moses, C. H. Baldwin, M. S. Allman +93
We describe and benchmark a new quantum charge-coupled device (QCCD) trapped-ion quantum computer based on a linear trap with periodic boundary conditions, which resembles a race t…
Comment on "Precision global measurements of London penetration depth in FeTeSe"
T. Klein, P. Rodiere, C. Marcenat
Cho et al. [Phys. Rev. B, 84, 174502 (2011)] have reported on the temperature dependence of the London penetration depth deduced from Tunnel Diode Oscillator (TDO) measurements in…
Detection of interstellar oxidaniumyl: abundant H2O+ towards the star-forming regions DR21, Sgr B2, and NGC6334
V. Ossenkopf, H. S. P. Müller, D. C. Lis +99
We identify a prominent absorption feature at 1115 GHz, detected in first HIFI spectra towards high-mass star-forming regions, and interpret its astrophysical origin. The character…
SEPIA - a new single pixel receiver at the APEX Telescope
V. Belitsky, I. Lapkin, M. Fredrixon +31
Context: We describe the new SEPIA (Swedish-ESO PI Instrument for APEX) receiver, which was designed and built by the Group for Advanced Receiver Development (GARD), at Onsala Spac…
Polariton lasing in high-quality Selenide-based micropillars in the strong coupling regime
T. Klein, S. Klembt, E. Durupt +3
We have designed and fabricated all-epitaxial ZnSe-based optical micropillars exhibiting the strong coupling regime between the excitonic transition and the confined optical cavity…
Upper critical field in {BaKBiO}: magnetotransport versus magnetotunneling
P. Samuely, P. Szabo, T. Klein +4
Elastic tunneling is used as a powerful direct tool to determine the upper critical field in the high- oxide BaKBiO. The temperature dependence of…
Subkelvin tunneling spectroscopy showing Bardeen-Cooper-Schrieffer superconductivity in heavily boron-doped silicon epilayers
F. Dahlem, T. Kociniewski, C. Marcenat +8
Scanning tunneling spectroscopies in the subKelvin temperature range were performed on superconducting Silicon epilayers doped with Boron in the atomic percent range. The resulting…
Herschel observations in the ultracompact HII region Mon R2: Water in dense Photon-dominated regions (PDRs)
A. Fuente, O. Berne, J. Cernicharo +42
Mon R2, at a distance of 830 pc, is the only ultracompact HII region (UC HII) where the photon-dominated region (PDR) between the ionized gas and the molecular cloud can be resolve…
Concentration around the mean for maxima of empirical processes
T. Klein, E. Rio
In this paper we give optimal constants in Talagrand's concentration inequalities for maxima of empirical processes associated to independent and eventually nonidentically distribu…
Exotic magnetic phase diagram and extremely robust antiferromagnetism in CeRhIn
T. Klein, C. Marcenat, A. Demuer +3
The antiferromagnetic heavy-fermion compound CeRhIn belongs to the same family and bears similarities with the well-studied prototypical material CeRhIn, which demonstr…
HIFI Observations of Water in the Atmosphere of Comet C/2008 Q3 (Garradd)
P. Hartogh, J. Crovisier, M. de Val-Borro +42
High-resolution far-infrared and sub-millimetre spectroscopy of water lines is an important tool to understand the physical and chemical properties of cometary atmospheres. We pres…
Magnetotransport and the upper critical magnetic field in MgB2
P. Szabo, P. Samuely, A. G. M. Jansen +4
Magnetotransport measurements are presented on polycrystalline MgB2 samples. The resistive upper critical magnetic field reveals a temperature dependence with a positive curvature…
Vortex-lattice melting and paramagnetic depairing in the nematic superconductor FeSe
F. Hardy, L. Doussoulin, T. Klein +9
The full H-T phase diagram in the nematic superconductor FeSe is mapped out using specific-heat and thermal-expansion measurements down to 0.7 K and up to 30 T for both field direc…
Magnetic and thermodynamic properties of CuTiSe single crystals
Z. Pribulová, Z. Medvecká, J. KaÄmarÄÃk +14
We present a detailed study of the phase diagram of copper intercalated TiSe single crystals, combining local Hall-probe magnetometry, tunnel diode oscillator technique (TDO),…
Single-gap two-band superconductivity well above the Pauli limit in non-centrosymmetric TaIrB
J. Kacmarcik, Z. Pribulova, T. Shiroka +11
Non-centrosymmetric superconducting materials represent an exciting class of novel superconductors featuring a variety of unconventional properties, including mixed-parity pairing…
Effect of the isoelectronic substitution of Sb for As on the magnetic and structural properties of LaFe(As1-xSbx)O
S. J. E. Carlsson, F. Levy-Bertrand, C. Marcenat +9
The antiferromagnetic order and structural distortion in the LaFe(As1-xSbx)O system have been investigated by powder neutron diffraction and physical properties measurements. Polyc…
Tunneling Spectroscopy and Vortex Imaging in Boron-Doped Diamond
B. Sacepe, C. Chapelier, C. Marcenat +4
We present the first scanning tunneling spectroscopy study of single-crystalline boron doped diamond. The measurements were performed below 100 mK with a low temperature scanning t…
Thermodynamic signatures of quantum criticality in cuprates
B. Michon, C. Girod, S. Badoux +14
The three central phenomena of cuprate superconductors are linked by a common doping , where the enigmatic pseudogap phase ends, around which the superconducting phase f…
HIFI spectroscopy of low-level water transitions in M82
A. Weiss, M. A. Requena-Torres, R. Guesten +23
We present observations of the rotational ortho-water ground transition, the two lowest para-water transitions, and the ground transition of ionised ortho-water in the archetypal s…
The origin of the [C II] emission in the S140 PDRs - new insights from HIFI
C. Dedes, M. Röllig, B. Mookerjea +38
Using Herschel's HIFI instrument we have observed [C II] along a cut through S140 and high-J transitions of CO and HCO+ at two positions on the cut, corresponding to the externally…
Low temperature transition to a superconducting phase in boron-doped silicon films grown on (001)-oriented silicon wafers
C. Marcenat, J. Kacmarcik, R. Piquerel +11
We report on a detailed analysis of the superconducting properties of boron-doped silicon films grown along the 001 direction by Gas Immersion Laser Doping. The doping concentratio…
Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals
A. Rydh, U. Welp, A. E. Koshelev +11
The angular dependence of the upper critical field Hc2 of MgB2 single crystals is studied at various temperatures by means of specific heat and transport measurements in magnetic f…
Water production in comet 81P/Wild 2 as determined by Herschel/HIFI
M. de Val-Borro, P. Hartogh, J. Crovisier +42
The high spectral resolution and sensitivity of Herschel/HIFI allows for the detection of multiple rotational water lines and accurate determinations of water production rates in c…
Puzzling evidence for surface superconductivity in the layered dichalcogenide CuTiSe
F. Levy-Bertrand, B. Michon, J. Marcus +4
We report on specific heat and magnetotransport measurements performed on superconducting CuTiSe single crystals. We show that superconductivity persists in transport…
Excitation of the molecular gas in the nuclear region of M82
A. F. Loenen, P. P. van der Werf, R. Güsten +23
We present high resolution HIFI spectroscopy of the nucleus of the archetypical starburst galaxy M82. Six 12CO lines, 2 13CO lines and 4 fine-structure lines are detected. Besides…
In-plane angular dependence of superconducting gaps in FeSe probed by high resolution specific heat measurements
H. Cercellier, K. Olson, M. Schuchard +4
The influence of a rotating magnetic field (in the plane) on the density of states has been investigated in the superconducting state of the nematic FeSe superconductor using…
Anomalous magnetic field dependence of the thermodynamic transition line in the isotropic superconductor (K,Ba)Bi03
S. Blanchard, T. Klein, J. Marcus +6
Thermodynamic (specific heat, reversible magnetization, tunneling spectroscopy) and transport measurements have been performed on high quality (K,Ba)BiO single crystals. The te…
The methanol lines and hot core of OMC2-FIR4, an intermediate-mass protostar, with Herschel-HIFI
M. Kama, C. Dominik, S. Maret +61
In contrast with numerous studies on the physical and chemical structure of low- and high-mass protostars, much less is known about their intermediate-mass counterparts, a class of…
Influence of Al doping on the critical fields and gap values in magnesium diboride single crystals
T. Klein, L. Lyard, J. Marcus +9
The lower () and upper () critical fields of MgAlB single crystals (for , 0.1 and ) have been deduced from specific heat and l…