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7 papers · 1 filter
Raman-modes of index-identified free-standing single-walled carbon nanotubes
Jannik C. Meyer, Matthieu Paillet, Thierry Michel +5
Using electron diffraction on free-standing single-walled carbon nanotubes we have determined the structural indices (n,m) of tubes in the diameter range from 1.4 to 3nm. On the sa…
Bose-Einstein Condensation of Magnons in Cs2CuCl4
T. Radu, H. Wilhelm, V. Yushankhai +5
We report on results of specific heat measurements on single crystals of the frustrated quasi-2D spin-1/2 antiferromagnet Cs_2CuCl_4 (T_N=0.595 K) in external magnetic fields B<12…
Noise estimation by use of neighboring distances in Takens space and its applications to stock market data
Krzysztof Urbanowicz, Janusz A. Holyst
We present a method that uses distances between nearest neighbors in Takens space to evaluate a level of noise. The method is valid even for high noise levels. The method has been…
Classical and quantum radiation of perturbed discrete breathers
S. Flach, V. Fleurov, A. V. Gorbach
We show that the linearized phase space flow around a discrete breather solution is not capable of generating persistent energy flow away from the breather even in the case of inst…
Ab initio Green's function formalism for band structures
Christian Buth, Uwe Birkenheuer, Martin Albrecht +1
Using the Green's function formalism, an ab initio theory for band structures of crystals is derived starting from the Hartree-Fock approximation. It is based on the algebraic diag…
Basis set convergence in extended systems: infinite hydrogen fluoride and hydrogen chloride chains
Christian Buth, Beate Paulus
Basis set convergence of the Hartree-Fock and the correlation energy is examined for the hydrogen bonded infinite bent chains (HF)_infinity and (HCl)_infinity. We employ series of…