Spin fluctuations beyond the Gutzwiller approximation: A renormalised paramagnon theory
Journal Article
·
· Journal of Low Temperature Physics
- Centre d`Etudes Nucleaires de Grenoble (France)
We analyze the spin fluctuations in the single-band lattice Hubbard model by using the slave-boson technique. It is shown that, at the Gaussian level beyond the saddle-point approximation, spin fluctuations obey a simple RPA-like form at all frequencies and wavevectors. Spin fluctuations, then, appear to give rise to an effective renormalized paramagnon theory opening new perspectives for the discussion of the effect of a magnetic field on Mott-Hubbard systems.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 107589
- Report Number(s):
- CONF-9409365--; CNN: Contract ERB 4050 PL920925
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 99; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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