Intercalation and High Temperature Superconductivity of Fullerides

Intercalation of polyatomic molecules into a superconductor can drastically affect the properties of the compound. A mechanism leading to a large increase in Tc for such systems is proposed. It explains the recent remarkable observation of high Tc superconductivity in the hole-doped C60/CHX3 (X=Cl,Br) compounds and the large shift in their Tc upon Cl->Br substitution. The increase in Tc is due to contribution to the pairing arising from the interaction of electrons with the vibrational manifold of the molecule. The proposed mechanism opens up the possibility to observe a site-selective isotope effect. We also suggest that intercalating CHI3 would further increase the critical temperature to Tc=140K.Comment: Final expanded version of cond-mat/0109553 and cond-mat/0110327 with Journal referenc

Women and leadership working paper series: Paper no. 1: Self-employed women: Four years on

Entrepreneurial or self-employed women are a growing component of the workforce worldwide. Australian statistics reveal that women are establishing their own businesses (in particular in self-employment) at a approximately twice the rate of men. In 1991-92 more than one million (41 per cent) of the 2.6 million people working in small business were women. Less than one third of these were self-employed or employers, while women accounted for 46 per cent of small business employees (Employment and Skills Formation Council, 1994)..

Disaggregated Spatial Modeling of Irrigated Land and Water Use

Land Economics/Use,

SOME EVIDENCE ON PECUNIARY ECONOMIES OF SIZE FOR FARM FIRMS

Agricultural Finance,

Dynamical Screening and Superconducting State in Intercalated Layered Metallochloronitrides

An essential property of layered systems is the dynamical nature of the screened Coulomb interaction. Low energy collective modes appear as a consequence of the layering and provide for a superconducting-pairing channel in addition to the electron-phonon induced attractive interaction. We show that taking into account this feature allows to explain the high critical temperatures (Tc~26K) observed in recently discovered intercalated metallochloronitrides. The exchange of acoustic plasmons between carriers leads to a significant enhancement of the superconducting critical temperature that is in agreement with the experimental observations

An ansatz for the exclusion statistics parameters in macroscopic physical systems described by fractional exclusion statistics

I introduce an ansatz for the exclusion statistics parameters of fractional exclusion statistics (FES) systems and I apply it to calculate the statistical distribution of particles from both, bosonic and fermionic perspectives. Then, to check the applicability of the ansatz, I calculate the FES parameters in three well-known models: in a Fermi liquid type of system, a one-dimensional quantum systems described in the thermodynamic Bethe ansatz and quasiparticle excitations in the fractional quantum Hall (FQH) systems. The FES parameters of the first two models satisfy the ansatz, whereas those of the third model, although close to the form given by the ansatz, represent an exception. With this ocasion I also show that the general properties of the FES parameters, deduced elsewhere (EPL 87, 60009, 2009), are satisfied also by the parameters of the FQH liquid.Comment: 6 pages, EPL styl