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192 papers · 1 filter
Variational Truncated Wigner Approximation
Dries Sels, Fons Brosens
In this paper we reconsider the notion of an optimal effective Hamiltonian for the semiclassical propagation of the Wigner distribution in phase space. An explicit expression for t…
Fe-vacancy order and superconductivity in PbO-type tetragonal β-Fe1-xSe
Ta-Kun Chen, Chung-Chieh Chang, Hsian-Hong Chang +12
Several superconducting transition temperatures in the range of 30-40 K were reported in the recently discovered intercalated FeSe sytem (A1-xFe2-ySe2, A = K, Rb, Cs, Tl). Although…
Melting of Partially Fluorinated Graphene: From Detachment of Fluorine Atoms to Large Defects and Random Coils
Sandeep Kumar Singh, S. Costamagna, M. Neek-Amal +1
The melting of fluorographene is very unusual and depends strongly on the degree of fluorination. For temperatures below 1000 K, fully fluorinated graphene (FFG) is thermo-mechanic…
Peierls distortion, magnetism, and high hardness of manganese tetraboride
Huiyang Gou, Alexander A. Tsirlin, Elena Bykova +10
We report crystal structure, electronic structure, and magnetism of manganese tetraboride, MnB4, synthesized under high-pressure high-temperature conditions. In contrast to superco…
The CMSSM and NUHM1 after LHC Run 1
O. Buchmueller, R. Cavanaugh, A. De Roeck +12
We analyze the impact of data from the full Run 1 of the LHC at 7 and 8 TeV on the CMSSM with mu > 0 and < 0 and the NUHM1 with mu > 0, incorporating the constraints imposed by oth…
Negative drag in nonequilibrium polariton quantum fluids
Mathias Van Regemortel, Michiel Wouters
The possibility of a negative drag force on a defect in nonequilibrium polariton quantum fluids is presented. We relate this phenomenon to the selective parametric amplification of…