Giuseppe Iadonisi

Degree in Physics (laurea): year 1962 in Napoli
Didactic activity and academic career:
Docent of General Physics since 1964 to 1971 and of Solid State Physics since 1971 to 1982;
Associate professor of Solid State Physics since 1982 to 1986;
Full professor of Solid State Physics since 1986;
Head of the theorical group on Solid Sate Physics since 1986
Member of the academic senate since 1996 of the University "Fedreico II" of Napoli;
Head of the Department of Physical Sciences since November 2000
Scientific activity
Since 1964 to 1975 he worked on the shallow resonant impurity states associated to the secondary minima of the band structure, obtaining relevant results (F. Bassani, G. Iadonisi and B. Preziosi, Phys. Rev. 186, 735 (1968) and Report on Progress in Physics 37, 1099 (1974)). Since 1975 to 1983 he worked on the electronic surface states of semiconductors, considering later the electromagnetic modes localized at the edges of metallic stripes put on semiconductors. Also in this field he obtained good results, well verified experimentally (V. Cataudella and G. Iadonisi, Phys. Rev. B, 38, 3815 (1988)).
Since 1983 he began to study the large polaron effects on the exciton formation in polar semiconductors, calculating with great accuracy the energies of the ground and excited states. The same theory has been applied later to the calculation of the binding energy of the large bipolaron, obtaining results in full agreement with those of the path-integral technique for small and inermediate values of the electron-phonon coupling constant. Since 1994 he has studied the properties of mixed systems of polarons and bipolarons and their phases transitions also in connection with the elementary mechanism of the high Tc superconductivity. He studied also the transition of polarons and bipolarons from large to small regime as function of the electron-phonon coupling constant and the width of the electronic band. The interest is now dedicated to the multi-polarons systems to understand the optical and transport properties of the manganites and cuprates and their phase diagram.
In the year 1997 he was director together prof. J.R. Schrieffer of the Course n. CXXXVI of the "International School of Physics Enrico Fermi" of Varenna dedicated to "Models and Phenomenology for Conventional and High-temperature Superconductivity".
Since July 1997 to June 2000 he was the national head of the project "Study, characterizations and manifacturing prototypes of porous silicon devices for detecting toxic gas" to understand the optical and transport properties of the nanometric porous silicon and to construct devices sensors of gas. The project obtained a great success both considering a model which allows to understand the optical properties of the porous silicon and contructing devices sensors of gas. Two patents have been obtained in this last field. The more recent studies regard the dependence of the chemical reactivity on the form and dimension of the nanometric systems.

List of publications since 1990 to 2001

1) Polaronic effects on two-dimensional excitons
M. Geddo and G. Iadonisi, Il Nuovo Cimento D 12, 1641 (1990)

2) Image states near metallic and insulating surfaces
D. Ninno and G. Iadonisi, Vuoto 20, 20 (1990)

3) Variational calculations of bipolarons binding energies
F. Bassani, M. Geddo, G. Iadonisi and D. Ninno, Phys. Rev. B 43, 5296,
(1991)

4) Binding energies, effective masses and screenings effects of
Froehlich bipolarons
V. Cataudella,G. Iadonisi and D. Ninno, Physica Scripta, T39, 71 (1991)

5) Plasmon effects on Froehlich bipolarons binding energy
V. Cataudella, G. Iadonisi and D. Ninno, Europhysics Letters 17, 709
(1992)

6) Plasmon-phonon cooperative effects in the diluite large bipolaron gas:
a possible mechanism for high Tc superconductivity
G. Iadonisi, M. Chiofalo, V. Cataudella and D. Ninno, Phys. Rev. B 48,
12966 (1993)

7) Mobility of Biplasmapolarons and high Tc superconductivity
G. Iadonisi, M. Chiofalo, V. Cataudella and D. Ninno, Il Nuovo Cimento D
15, 1035 (1993)

8) Dynamical screening of excitons in $GaAs$ electron-hole plasma
D. Ninno, F. Liguori, V. Cataudella, G. Iadonisi and G. Di Francia, Il
Vuoto 25, 54(1996)

9) Theory of dynamical screening effects in the exciton and bipolaron formation; an application to strongly photoexcited semiconductors and to
the bipolaron model for high Tc superconductivity
G. Capone, V. Cataudella, M.L. Chiofalo, R. Di Girolamo, G. Iadonisi, F.
Liguori, and D. Ninno, Intern. Conf. on Superconductity and strongly
correlated electron systems, Amalfi, Ottobre 1993, World Scientific 1994

10)Polaron and bipolaron coexistence in high Tc superconductivity
G. Iadonisi, V. Cataudella, D. Ninno and M.L. Chiofalo, Physics Letters A
196, 359 (1995)

11) Dynamical screening of excitons in strongly photoexcited
semiconductors
D. Ninno, V. Cataudella, G. Iadonisi, F. Liguori, Jour. Phys.: Condensed
Matter 6, 9335 (1994)

12) Linear screening effects on large bipolaron
G. Capone, V. Cataudella, G. Iadonisi, D. Ninno, Il Nuovo Cimeno D 17, 143 (1995)

13) A simple model for porous silicon photoluminescence line shape
G. Di Francia, G. Iadonisi, P. Maddalena, M. Migliaccio, D. Ninno, E.
Santamato, Optics Communications 127, 44 (1996)

14) On the boson-fermion model of superconductivity
V. Cataudella, G. Iadonisi, D. Ninno and M.L. Chiofalo, Il Nuovo Cimento D
18, 1307 (1996)

15) Electron screening effect on self-trapping of polarons
G. Iadonisi, G. Capone, V. Cataudella, G. De Filippis, Phys. Rev. B 53,
13497 (1996)

16) Plasmapolaron self-energy and effective mass in uniaxial polar
crystals
G. Iadonisi, G. Capone, V. Cataudella and D. Ninno, Physica Status
Solidi(b) 197, 381 (1996)

17) Testing of porous Silicon as H2O vapour sensor
V. La Ferrara, D. Ninno, G. Iadonisi, G. Di Francia, F. Bellucci, T.
Monetta and E.V. Sasso, Proceedings SAA96, Sberveglieri e Todello Edit., Editrice Compositori 1997, pag. 181

18) Polaron theory in wide and narrow electron bands
G. Iadonisi, V. Cataudella, D. Ninno, Physica Status Solidi (b) 203, 411
(1997)

19) Coexistence of large and small mass polarons
G. Iadonisi, V. Cataudella, G. De Filippis, D. Ninno, Europhysics Letters
41, 309 (1998)

20) Conduction electron gas dielectric function of multi-valley
semiconductors: an application to silicon
F. Liguori, D. Ninno, G. Iadonisi, Physica Status Solidi (b) 207, 205
(1998)

21) Boson-Fermion model in mean field approximation
E. Piegari, V. Cataudella, G. Iadonisi, Physica C 303, 273 (1998)

22) CDW instability and infrared absorption of an interacting large
polaron gas
G. De Filippis, V. Cataudella, G. Iadonisi, in Stripes and Related Phenomena, A. Bianconi and N.L. Saini Eds, Kluwer Academic N.Y. 2000, pag. 175

23) Boson-fermion model and high Tc superconductivity
V. Cataudella, G. Capone, M.L. Chiofalo, G. De Filippis, G. Iadonisi, D.
Ninno, E. Piegari, Proceedings of the CXXXVI Course of the Enrico Fermi
School, G. Iadonisi, R. J. Schrieffer and M.L. Chiofalo Eds., Varenna
1997,IOS Press 1998, pag. 393

24) Large polarons, bipolarons and boson-fermion model of
superconductivity
V. Cataudella, G. Iadonisi, D. Ninno, G. De Filippis and M.L. Chiofalo, Il
Nuovo Cimento 19D, 1357 (1997)

25) Optical properties of an interacting large polaron gas
V. Cataudella, G. De Filippis, G. Iadonisi, European Physical Journal B
12, 17 (1999)

26) Coexistence of large and small polarons and relative optical infrared properties in perovskitic materials
G. Iadonisi, V. Cataudella, G. De Filippis, Invited paper to the XXXVI
Meeting European High Pressure Research Group (EHPRG), Catania 1998,
Physica B, 265, 146 (1999)

27) Normal state properties of an interacting large polaron gas
G. De Filippis, V. Cataudella, G. Iadonisi, Europpean Physical Journal B
8, 339 (1999)

28) Carrier localization and photoluminescence in porous silicon
D. Ninno, G. Iadonisi, F. Buonocore, Solid State Comm. 112, 521 (1999)

29) Theoretical calculations of shallow impurity states in deformed
quantum wires with an application to porous silicon
F. Buonocore, D. Ninno, G. Iadonisi, Phys. Rev. B 62, 10914 (2000)

30) A theory for Porous Silicon reactivity to gas environment
D. Ninno, G. Iadonisi, F. Buonocore, G. Di Francia, in Proceedings of
Eurosensor XIII (European Conference on solid state transducers), The
Hague, (Delft University) The Netherland, 12-15 september 1999, pag. 179

31) A new variational approach for the Holstein Molecular Crystal Model
V. Cataudella, G. De Filippis and G. Iadonisi, Phys. Rev. B 60, 15653
(1999)

32) Polaron features of the one-dimensional Holstein Molecular Crystal
Model
V. Cataudella, G. De Filippis and G. Iadonisi, Phys. Rev. B 62, 1496
(2000)

33) Topological surface states in deformed wires
G. Cantele, D. Ninno, G. Iadonisi, Phys. Rev. B 61, 13730 (2000)}

34) A theory for semiconductor nanostructure reactivity to gas
environment
D. Ninno, G. Iadonisi, F. Buonocore, G. Cantele, G. Di Francia, Sensors
and Attuators B 68, 17 (2000)}

35) Reversible and Irreversible Effects of Gas Environments on Porous
Silicon Photoluminescence
G. Di Francia, V. La Ferrara, T. Fasolino, L. Quercia, L. Lancellotti,
G. Iadonisi, D. Ninno: in Proc. of the 4th Italian Conference on
Sensors and Microsystems (C. Di Natale, A. D'Amico and G. Sberveglieri Eds.,(World Scientific Publishing, Singapore, 2000)

36) Application of Porous Silicon as a Gas Sensor
G. Di Francia, L. Quercia, G. Iadonisi, V. La Ferrara, L. Lancellotti, D. Ninno, C. Baratto, E. Comini, G. Faglia and G. Sberveglieri, in Proc. Of Workshop on Biosensors, ENEA-Roma, 18-19 Marzo
1999, in press

37) Localized states in arbitrarly shaped quantum wire: a variation-
perturbation technique
F. Buonocore, D. Ninno, G. Iadonisi, physica status solidi (b) 225, 343 (2001)

38) Confined states in ellipsoidal quantum dots
G. Cantele, D. Ninno, G. Iadonisi, J. Phys.: Condensed Matter 12, 9019
(2000)

39) Calculation of plasmonic dispersion in quantum wires: state filling,
shape confinement and angular degeneracy effects
F. Liguori, F. Buonocore, D. Ninno, G. Iadonisi, Phil. Magazine B 81, 365
(2001)

40) The role of quantum confinement in porous silicon gas sensors
D. Ninno, F. Buonocore, G. Cantele, G. Iadonisi, G. Di Francia, in Sensors
and Microsystems, C. Di Natale, A. D'Amico e P. Siciliano Eds., World
Scientific 2000, pag. 134

41) Impurity and topological surface states in porous silicon
D. Ninno, F. Buonocore, G. Cantele, G. Iadonisi, physica status solidi
(a), 182, 285 (2000)

42) Carrier localization in porous silicon
D. Ninno, G. Iadonisi: in Proc. of the sixth national meeting on LIGHT
EMETTING SILICON, G. Di Francia, P. Maddalena, D. Ninno Editors, Naples
29-30 October 1998 (Cuen, Naples)

43) Internal vibrational structure of the three-dimensional large
bipolaron
G. Iadonisi, V. Cataudella, G. De Filippis, V. Mukhomorov, European
Journal of Physics B 18, 67 (2000)

44) Models and Phenomenology for Conventional and High-Temperature Superconductivity
G. Iadonisi, R. Schrieffer, M. Chiofalo eds, IOS Press 1998

45) Crossover from large to small bipolaron
G. Iadonisi, G. De Filippis, V. Cataudella, C.A. Perroni, Jour. Phys.:
Condensed Matter 13, 1499 (2001)

46) Coexistence of charges trapped in local lattice distorsion and free
carriers in cuprates
V. Cataudella, G. De Filippis, G. Iadonisi, A. Bianconi, N.L. Saini,
III Intern. Conf. on Stripes and high Tc superconductivity, Int. J. Mod.
Phys. 14, 3398 (2000)

47) Coexistence of large and small polarons in manganites
V. Cataudella, G. De Filippis and G. Iadonisi, Phys. Rev. B 63, 52406
(2001)

48) Calculation of the infrared optical transitions in semiconductor
ellipsoidal quantum dots
G. Cantele, D. Ninno, G. Iadonisi, Nano Letters 1, 121 (2001)

49) Shape effects on the one- and two-electrons ground state in
ellipsoidal quantum dots
G. Cantele, D. Ninno and G. Iadonisi, Phys. Rev. B 64, 125325 (2001)

50) Coexistence of large and small polarons in manganites and cuprates
G. Iadonisi, V. Cataudella, G. De Filippis, C.A. Perroni, E. Piegari and
F. Ventriglia, in "Electrons and photons in Solids", Collana della Scuola
Normale Superiore, Pisa 2001

51) Electronic states and optical properties in quantum wires and dots
G. Iadonisi, F. Buonocore, G. Cantele, G. Di Francia, V. Marigliano and
D. Ninno, in "Electrons and photons in Solids", Collana della Scuola
Normale Superiore, Pisa 2001

52) Polarons in cylindrical quantum wires
F. Buonocore, D. Ninno and G. Iadonisi, Phys. Rev. B 65, 205415 (2002)

53) Polaron and bipolaron formation in the Hubbard-Holstein model: role of the next-nearest neighbor electron hopping
G. De Filippis, V. Citadel, G. Iadonisi, V. Marigliano Ramaglia, C.A. Perroni and F. Ventriglia, Phys. Rev. B 64, 155105 (2001)

54) Spectral properties and infrared absorption in manganites
C.A. Perroni, G. De Filippis, V. Cataudella and G. Iadonisi, Phys. Rev. B 64, 144302 (2001)

55) On the effects of the magnetic field and the isotopic substitution upon the infrared absorption of manganites
C.A. Perroni, G. De Filippis, V. Cataudella,G. Iadonisi, submitted

56) Comment on "Polaron in Carbon Nanotube"
E. Piegari, V. Cataudella, V. Marigliano and G. Iadonisi, Phys. Rev. Lett., to appear

57) Optical anisotropy of ellipsoidal quantum dots
G. Cantele, D. Ninno and G. Iadonisi, to appear on Phys. Rev. B