Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Martin Indergand"'
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::134575789c05a0aa0f61af7052b087f5
https://doi.org/10.2139/ssrn.4023592
https://doi.org/10.2139/ssrn.4023592
Publikováno v:
SSRN Electronic Journal.
We propose a methodology for measuring the market-implied capital of banks by subtracting from the market value of equity (market capitalization) a credit-spread-based correction for the value of shareholders' default option. We show that without suc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bad06f4935fd92151413faed787fba3d
https://doi.org/10.2139/ssrn.3911865
https://doi.org/10.2139/ssrn.3911865
Autor:
Martin Indergand, Manfred Sigrist
Publikováno v:
Progress of Theoretical Physics. 117:1-15
We give a rigorous proof of the existence of long-range antiferromagnetic order in the ground state of several two-dimensional spin-1/2 Heisenberg systems. Three types of systems are considered. The first type consists of an even number, N, of couple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::892bb132d238eaa7c98d3c952c3b4446
https://doi.org/10.1143/ptp.117.1
https://doi.org/10.1143/ptp.117.1
Autor:
Martin Indergand, Manfred Sigrist
Publikováno v:
Physica B: Condensed Matter. :1357-1359
A multi-orbital model for the CoO layer in NaxCoO2 is discussed for Na-content x close to 1. In this model, the kinetic energy for the degenerate t2g orbitals is given by indirect hopping through oxygen, leading naturally to four independent inter-pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::440f0736d63d730d441dc8439bd5efcc
https://doi.org/10.1016/j.physb.2005.01.410
https://doi.org/10.1016/j.physb.2005.01.410
Publikováno v:
Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2007, 75 (4), pp.045105. ⟨10.1103/PhysRevB.75.045105⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2007, 75 (4), pp.045105. ⟨10.1103/PhysRevB.75.045105⟩
An extended Hubbard model (including nearest-neighbor repulsion and antiferromagnetic spin exchange) is investigated on the frustrated checkerboard lattice, a two-dimensional analog of the pyrochlore lattice. Combining Gutzwiller renormalized mean-fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::233e72ddb9b157cdab804f4a5bb6731f
Publikováno v:
Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2006, 74, pp.064429. ⟨10.1103/PhysRevB.74.064429⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2006, 74, pp.064429. ⟨10.1103/PhysRevB.74.064429⟩
We explore both analytically and numerically the properties of doped t-J models on a class of highly frustrated lattices, such as the kagome and the pyrochlore lattice. Focussing on a particular sign of the hopping integral and antiferromagnetic exch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4c3f80e83662fe411fc92c5a18702df
Publikováno v:
The European Physical Journal B, 48 (1)
The European Physical Journal B, 48 (1)
ISSN:1434-6028
ISSN:1434-6036
ISSN:1434-6028
ISSN:1434-6036
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4be534c61af100d950f1d316501d9a21
https://hdl.handle.net/20.500.11850/35257
https://hdl.handle.net/20.500.11850/35257
Publikováno v:
Physical Review B. 71
A multiorbital model for a $\mathrm{Co}{\mathrm{O}}_{2}$ layer in ${\mathrm{Na}}_{x}\mathrm{Co}{\mathrm{O}}_{2}$ is derived. In this model, the kinetic energy for the degenerate ${t}_{2g}$ orbitals is given by indirect hopping over oxygen, leading na
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0aa0f765af910451dcb68cbccba782ff
https://doi.org/10.1103/physrevb.71.214414
https://doi.org/10.1103/physrevb.71.214414
Publikováno v:
Physical Review B. 67
A chemical potential difference between the legs of a two-leg ladder is found to be harmful for Cooper pairing. The instability of superconductivity in such systems is analyzed by compairing results of various analytical and numerical methods. Within
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1dc28a98d331015dfc32b555119d3f8e
https://doi.org/10.1103/physrevb.67.184517
https://doi.org/10.1103/physrevb.67.184517