281 research outputs found
Reply to Comment on "High-field studies of superconducting fluctuations in high-Tc cuprates: Evidence for a small gap distinct from the large pseudogap" by M.V. Ramallo et al
The experimental investigations done in our paper Phys.Rev.B84,014522(2011)
allowed us to establish that the superconducting fluctuations (SCF) always die
out sharply with increasing T. But contrary to the claim done in the comment of
Ramallo et al., this sharp cutoff of SCF measured in YBa2Cu3O{6+x} depends on
hole doping and/or disorder. So our data cannot be used to claim for a
universality of the extended gaussian Ginzburg Landau theory proposed by the
authors of the comment. Furthermore, to explain quantitatively our data near
optimal doping using this model they need to consider that fluctuations in the
two CuO2 planes of a bilayer are totally decoupled, which is not physically
well justified. On the contrary a consistent interpretation of all our data
(paraconductivity, Nernst effect and magnetoresistance) has been done by
considering that the coupling between the two layers of the unit cell is
dominant at least up to 1.1Tc.Comment: Reply to the comment published in Phys. Rev. B 85,106501 (2012
Magneto-electric momentum transfer to atoms and molecules
We report the first observation of mechanical momentum transferred to atoms
and molecules upon application of crossed electric and magnetic fields. We
identify this momentum as the microscopic analogue of the classical Abraham
force. Several predictions of additional magneto-electrically induced
mechanical momentum are addressed. One of them, proposed to result from the
interaction with the quantum vacuum, is experimentally refuted, others are
found to be currently below experimental detection.Comment: 4 pages, 3 figures, one tabl
Strong electrical magneto-chiral anisotropy in tellurium
We report the experimental observation of strong electrical magneto-chiral anistropy (eMChA) in trigonal tellurium (t-Te) crystals. We introduce the tensorial character of the effect and determine several tensor elements and we propose a novel intrinsic bandstructure-based mechanism for eMChA which gives a reasonable description of the principal results
Inverse Cotton-Mouton effect of the Vacuum and of atomic systems
In this letter we calculate the Inverse Cotton-Mouton Effect (ICME) for the
vacuum following the predictions of Quantum ElectroDynamics. We compare the
value of this effect for the vacuum with the one expected for atomic systems.
We finally show that ICME could be measured for the first time for noble gases
using state-of-the-art laser systems and for the quantum vacuum with
near-future laser facilities like ELI and HiPER, providing in particular a test
of the nonlinear behaviour of quantum vacuum at intensities below the Schwinger
limit of 4.5x10^33 W/m^2.Comment: Submitted to EP
Observation of the Inverse Cotton-Mouton Effect
We report the observation of the Inverse Cotton-Mouton Effect (ICME) i.e. a
magnetization induced in a medium by non resonant linearly polarized light
propagating in the presence of a transverse magnetic field. We present a
detailed study of the ICME in a TGG crystal showing the dependence of the
measured effect on the light intensity, the optical polarization, and on the
external magnetic field. We derive a relation between the Cotton-Mouton and
Inverse Cotton-Mouton effects that is roughly in agreement with existing
experimental data. Our results open the way to applications of the ICME in
optical devices
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