Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Quantenmagnetismus"'
Autor:
Hering, Max
We enhance the pseudo-fermion functional-renormalisation-group (PFFRG) method for the investigation of highly frustrated quantum spin systems in two significant ways. On one hand, we generalise the method towards off-diagonal Dzyaloshinsky-Moriya (DM
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ddc0f707f6c3be0ab7078cf1b0b5c4b3
Autor:
Utz, Yannic
The thesis is devoted to the study of in-chain impurities in spin 1/2 antiferromagnetic Heisenberg chains (S=1/2 aHC's) ---a model which accompanies the research on magnetism since the early days of quantum theory and which is one of the few integrab
Externí odkaz:
https://tud.qucosa.de/id/qucosa%3A30141
https://tud.qucosa.de/api/qucosa%3A30141/attachment/ATT-1/
https://tud.qucosa.de/api/qucosa%3A30141/attachment/ATT-1/
Autor:
Utz, Yannic
The thesis is devoted to the study of in-chain impurities in spin 1/2 antiferromagnetic Heisenberg chains (S=1/2 aHC's) ---a model which accompanies the research on magnetism since the early days of quantum theory and which is one of the few integrab
Autor:
Powalski, Michael
In this thesis the elementary excitations of the spin-1=2 Heisenberg antiferromagnet on the square lattice are studied. This fundamental model is a paradigmatic example for long range ordered quantum phases and the spontaneous breaking of a continuou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ec522cd4598f4940225c420090cc96b
Autor:
Utz, Yannic
The thesis is devoted to the study of in-chain impurities in spin 1/2 antiferromagnetic Heisenberg chains (S=1/2 aHC's)---a model which accompanies the research on magnetism since the early days of quantum theory and which is one of the few integrabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______4179::8d5993a437a19c153ba74b0aa251a3a1
https://tud.qucosa.de/id/qucosa:30141
https://tud.qucosa.de/id/qucosa:30141
Autor:
Janson, Oleg
In the vast realm of inorganic materials, the Cu2+-containing cuprates form one of the richest classes. Due to the combined effect of crystal-field, covalency and strong correlations, all undoped cuprates are magnetic insulators with well-localized s
Externí odkaz:
https://tud.qucosa.de/id/qucosa%3A26106
https://tud.qucosa.de/api/qucosa%3A26106/attachment/ATT-0/
https://tud.qucosa.de/api/qucosa%3A26106/attachment/ATT-0/
Autor:
Peters, David
Publikováno v:
Aachen : Publikationsserver der RWTH Aachen University 96 S. : graph. Darst. (2012). = Aachen, Techn. Hochsch., Diss., 2012
In this thesis ground state properties of S = 1 spin chains with exchange and single-ion anisotropy are analysed. Following earlier publications two cases are mainly considered: A fixed ratio of the two anisotropies as well as a fixed and strong exch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______791::e628e9bc8784d8395f241db3b5ea1b5a
https://publications.rwth-aachen.de/record/62951
https://publications.rwth-aachen.de/record/62951