Squire, R. H., March, N. H., Booth, M. L.
There has been considerable effort expended towards understanding high temperature superconductors (HTSC), and more specifically the cuprate phase diagram as a function of doping level. Yet, the only...
Proposed lower bound for the shear viscosity to entropy density ratio in some dense liquids (2009)
Angilella, G. G. N., March, N. H., Pellegrino, F. M. D., Pucci, R.
Starting from relativistic quantum field theories, Kovtun et al. (2005) have quite recently proposed a lower bound eta/s >= hbar /(4 pi kB), where eta is the shear viscosity and s the volume density...
Statistical correlations of an anyon liquid at low temperatures (2008)
Pellegrino, F. M. D., Angilella, G. G. N., March, N. H., Pucci, R.
Using a proposed generalization of the pair distribution function for a gas of non-interacting particles obeying fractional exclusion statistics in arbitrary dimensionality, we derive the statistical...
March, N. H., Cabo, A., Claro, F., Angilella, G. G. N.
In both molecular physics and condensed matter theory, deeper understanding of the correlation energy density epsilon_c (r) remains a high priority. By adopting Loewdin's definition of correlation...
Forte, G., Grassi, A., Lombardo, G. M., Angilella, G. G. N., March, N. H., Pucci, R.
Krueger some years ago proposed a cluster LiBeBCNOF, now called periodane. His ground-state isomer proposal has recently been refined by Bera et al. using DFT. Here, we take the approach of molecules...
A recent work of Schmidt and Springborg on one-dimensional chains of metal atoms has prompted us to use a quantum-chemical model, posed in terms of dimer potential energy curves, to analyze...
Statistical correlations in an ideal gas of particles obeying fractional exclusion statistics (2007)
Pellegrino, F. M. D., Angilella, G. G. N., March, N. H., Pucci, R.
After a brief discussion of the concepts of fractional exchange and fractional exclusion statistics, we report partly analytical and partly numerical results on thermodynamic properties of assemblies...
Morawetz, K., March, N. H., Squire, R. H.
The chemical potential $\mu$ of a many-body system is valuable since it carries fingerprints of phase changes. Here, we summarize results for $\mu$ for a thre e-dimensional electron liquid in terms...
Niehaus, T. A., Suhai, S., March, N. H.
Holas, Howard and March [Phys. Lett. A {\bf 310}, 451 (2003)] have obtained analytic solutions for ground-state properties of a whole family of two-electron spin-compensated harmonically confined...
Angilella, G. G. N., March, N. H., Pucci, R.
In earlier work, we have been concerned with the scaling properties of some classes of superconductors, specifically with heavy Fermion materials and with five bcc transition metals of BCS character....
Grassi, A., Lombardo, G. M., Forte, G., Angilella, G. G. N., Pucci, R., March, N. H.
Ab initio calculations including electron correlation are still extremely costly except for the smallest atoms and molecules. Therefore, our purpose in the present study is to employ a bond-order...
Electronic structure of clusters (LiBC)_n: n=1, 2, 4 (2005)
Lombardo, G. M., Grassi, A., Forte, G., Angilella, G. G. N., Pucci, R., March, N. H.
A crystalline form of LiBC is known which has been predicted to be superconducting, with a Tc comparable to that of MgB_2. In both compounds, superconductivity is enhanced by the presence of two...
Angilella, G. G. N., March, N. H., Pucci, R.
The superconducting transition temperature Tc has earlier been correlated with coherence length and effective mass for a series of heavy Fermion (HF) materials at atmospheric pressure. Here, a...
ELECTRONIC STRUCTURE OF METALLIC ALLOYS. (2005)
In a previous report a method using the effective potential matrix (Hilton, March and Curtis, 1967 referred to hereafter as HMC) was proposed for dealing with alloys. In order to apply this method to...
ELECTRONIC STRUCTURE OF METALLIC ALLOYS. (2005)
The electronic partition function from the c-matrix of a hypothetical system of randomly arranged scattering centers is calculated. This result has been generalized to deal with the cases of a pure...
Electronic Structure of Metallic Alloys. (2005)
March,N. H., Stoddart,J. C., Rousseau,J. S.
The two part report discusses: An electron theory treatment of relaxations round the lattice of point defects in metals, and the development of electron states in disordered systems by considering...
ELECTRON CORRELATION IN METALS (2005)
Results for the diagonal element of the secondorder density matrix (pair function) and for the momentum distribution of an interacting electron gas are presented. In the low density limit, it is...
Grassi, A., Lombardo, G. M., Forte, G., Angilella, G. G. N., Pucci, R., March, N. H.
The present study of small molecules containing silicon has been motivated by (a) the considerable interest being shown currently in the kinetics and reactivity of such molecules, and (b) the...
The Gross-Pitaevskii equations and beyond for inhomogeneous condensed bosons (2004)
Angilella, G. G. N., Bartalini, S., Cataliotti, F. S., Herrera, I., March, N. H., Pucci, R.
A simple derivation of the static Gross-Pitaevskii (GP) equation is given from an energy variational principle. The result is then generalized heuristically to the time-dependent GP form. With this...
Superconducting transition temperatures of the elements related to elastic constants (2004)
Angilella, G. G. N., March, N. H., Pucci, R.
For a given crystal structure, say body-centred-cubic, the many-body Hamiltonian in which nuclear and electron motions are to be treated from the outset on the same footing, has parameters, for the...
Leys, F. E., March, N. H., Angilella, G. G. N., Zhang, M. L.
The recent experimental study by means of time-resolved luminescence measurements of an electron-hole liquid (EHL) in diamond by Shimano et al. [Phys. Rev. Lett. 88 (2002) 057404] prompts us to...
Stretched chemical bonds in Si6H6: A transition from ring currents to localized pi-electrons? (2004)
Grassi, A., Lombardo, G. M., Pucci, R., Angilella, G. G. N., Bartha, F., March, N. H.
Motivated by solid-state studies on the cleavage force in Si, and the consequent stretching of chemical bonds, we here study bond stretching in the, as yet unsynthesized, free space molecule Si6H6....
Grassi, A., Lombardo, G. M., Angilella, G. G. N., March, N. H., Pucci, R.
In a recent study by Kornath et al. [J. Chem. Phys. 118 (2003) 6957], the Li_n clusters with n=2, 4 and 8 have been isolated in argon matrices at 15 K and characterized by Raman spectroscopy. This...
Angilella, G. G. N., March, N. H., Pucci, R.
We give here the derivation of a Gross-Pitaevskii--type equation for inhomogeneous condensed bosons. Instead of the original Gross-Pitaevskii differential equation, we obtain an integral equation...
Correlation between characteristic energies in non-s-wave pairing superconductors (2004)
Angilella, G. G. N., Leys, F. E., March, N. H., Pucci, R.
By solution of the Bethe-Goldstone equation for the Cooper pairing problem, an approximate analytic relation is derived between coherence length xi and the binding energy of the Cooper pair. This...
Leys, F. E., Amovilli, C., March, N. H.
After a brief discussion of the structural trends which appear with increasing number of atoms in B cages, a one-to one correspondence between the connectivity of B cages and C cage structures will...
Linear response function around a localized impurity in a superconductor (2002)
Angilella, G. G. N., Leys, F. E., March, N. H., Pucci, R.
Imaging the effects of an impurity like Zn in high-Tc superconductors [Nature 61 (2000) 746] has rekindled interest in defect problems in the superconducting phase. This has prompted us here to...
Interatomic Forces in Solid and Liquid Transition Metals. (2002)
March,N. H., Matthai,C. C., Grout,P. J.
The objective was to obtain a practical description of the force fields in transition metals. Central pair potentials for Ni and Pt have been constructed in agreement with calculations and...
Tc for non s-wave pairing superconductors correlated with coherence length and effective mass (2001)
Angilella, G. G. N., March, N. H., Pucci, R.
For unconventional heavy Fermion superconductors, typified by UBe_13, the superconducting transition temperatures Tc are shown to correlate with a characteristic energy hbar^2 /(m* xi^2), m* being...
Angilella, G. G. N., March, N. H., Pucci, R.
Following earlier work on electron or hole liquids flowing through assemblies with magnetic fluctuations, we have recently exposed a marked correlation of the superconducting temperature Tc, for non...
Minguzzi, A., March, N. H., Tosi, M. P.
We evaluate analytically some ground state properties of two-dimensional harmonically confined Fermi vapors with isotropy and for an arbitrary number of closed shells. We first derive a differential...
Kinetic energy functional for Fermi vapors in spherical harmonic confinement (2001)
Minguzzi, A., March, N. H., Tosi, M. P.
Two equations are constructed which reflect, for fermions moving independently in a spherical harmonic potential, a differential virial theorem and a relation between the turning points of kinetic...
Minguzzi, A., Tosi, M. P., March, N. H.
The fact that the ground-state first-order density matrix for Bosons in a parabolic potential with interparticle harmonic interactions is known in exact form is here exploited to study collective...
IMPURITIES AND IMPERFECTIONS IN METALS AND SEMICONDUCTORS (1998)
IT IS SHOWN HOW A FULL PERTURBATION TREATMENT OF THE Dirac density matrix may be developed as a basis for self-co sistent calculations in free-el ctron metals containing localized efects. The present...
IMPURITIES AND IMPERFECTIONS IN METALS AND SEMI-CONDUCTORS (1998)
STATES IN SECOND-ORDER TREATMENT: Formula for density of states; Connection with Houghton's work; and Specific heat of dilute alloys. Further results on perturbations in anrdman. 31 May 62, 48p....
IMPURITIES AND IMPERFECTIONS IN METALS AND SEMICONDUCTORS. (1998)
Contents: Second-order electron theory of the specific heats of dilute alloys; Nearly-free electron theory; Validity of low-order perturbation theory; Density of states for Bloch wave case; Models...
Electronic Structure of Metallic Alloys. (1998)
March,N. H., Rousseau,J. S., Stoddart,J. C.
The problems are treated in the current report. The first, relevant to dilute metallic alloys, is concerned with the treatment of relaxation round impurities in metals. A synthesis is achieved...
López, J. M., Alonso, J. A., March, N. H., Garcias, F., Barranco, M.
Using the extended Thomas-Fermi version of density-functional theory (DFT), calculations are presented for the barrier for the reaction Na20++Na20+¿Na402+. The deviation from the simple Coulomb...
Hartree-Fock method posed as a density-functional theory: Application to the Be atom (1993)
Holas, A., March, N. H., Takahashi, Y., Zhang, C.
The Hartree-Fock ground-state energy and electron density are first shown to be derivable from a local one-body effective potential v(r). As a nontrivial example, attention is then focused on the Be...
Hartree-Fock method posed as a density-functional theory: Application to the Be atom (1993)
Holas, A., March, N. H., Takahashi, Y., Zhang, C.
The Hartree-Fock ground-state energy and electron density are first shown to be derivable from a local one-body effective potential v(r). As a nontrivial example, attention is then focused on the Be...
Hartree-Fock method posed as a density-functional theory: Application to the Be atom (1993)
Holas, A., March, N. H., Takahashi, Y., Zhang, C.
The Hartree-Fock ground-state energy and electron density are first shown to be derivable from a local one-body effective potential v(r). As a nontrivial example, attention is then focused on the Be...
Hartree-Fock method posed as a density-functional theory: Application to the Be atom (1993)
Holas, A., March, N. H., Takahashi, Y., Zhang, C.
The Hartree-Fock ground-state energy and electron density are first shown to be derivable from a local one-body effective potential v(r). As a nontrivial example, attention is then focused on the Be...
Electron density theory of atoms and molecules / N. H. March (1992)
Incluye bibliografía e índice
Concentration fluctuations in simple liquid alloys with atomic size mismatch (1982)
Alonso, J.A., López, J.M., March, N.H.
Flory's expression for the free energy of mixing of binary liquid alloys with atomic size mismatch is modified by introducing the concentration dependency of the heat of mixing given by the...
Concentration fluctuations in simple liquid alloys with atomic size mismatch (1982)
Alonso, J.A., López, J.M., March, N.H.
Flory's expression for the free energy of mixing of binary liquid alloys with atomic size mismatch is modified by introducing the concentration dependency of the heat of mixing given by the...
Concentration fluctuations in simple liquid alloys with atomic size mismatch (1982)
Alonso, J.A., López, J.M., March, N.H.
Flory's expression for the free energy of mixing of binary liquid alloys with atomic size mismatch is modified by introducing the concentration dependency of the heat of mixing given by the...