Xanthippi Zianni, Professor of Physics CV Web Page

Profile

I received my First Degree in Physics from the Physics Department of the University of Athens (Greece) and my PhD in Theoretical Solid State Physics from the Physics Department of the University of Warwick (UK). I am currently Professor of Physics at the Department of Aerospace Science and Technology of NKUA, previously at the Dept. of Aircraft Technology of the Technological Educational Institution (TEI) of Sterea Ellada and at TEI of Chalkida. I have conducted research at the University of Athens and at NCSR ‘Demokritos’ at the Institute of Materials Science (IMS) and at the Institute of Microelectronics (IMEL). I was collaborative researcher of the Institute of Nanoscience and Nanotechnology (INN), NCSR ‘Demokritos’, visiting professor/researcher at MATEIS and CETHIL of the INSA de Lyon (France) and at LEMTA of the University of Lorraine (France). I am member of the European and International Thermoelectric Societies and, since 2017, academician of the International Thermoelectric Academy (ITA).

Research Interests

Research area
Theoretical condensed matter physics and computational modelling

Research topics
• percolation theory and conductivity of disordered media
• scattering and thermoelectric transport properties of low-dimensional semiconductors
• transport effects in semiconductor devices
• phonons in low-dimensional structures
• magnetic properties of magnetic nanoparticles
• electronic and optical properties of nanowires and nanodots
• thermoelectric transport properties of quantum-dot devices
• thermal and thermoelectric transport properties of nanostructures and nanostructured materials
• energy conversion at the nanoscale
• nano-thermodynamics and quantum technologies

Scientific Publications

Thermoelectric properties of nanostructured materials

The annealed-nanograin phase: a route for simultaneous increase of the conductivity and the Seebeck coefficient and high thermoelectric performance

X.Zianni, Special Issue on Advanced Thermoelectrics, Journal of Applied Physics 126, 194301 (2019)

Synergy between defects, charge neutrality and energy filtering in hyper-doped nanocrystalline materials for high thermoelectric efficiency

X.Zianni and D. Narducci, Nanoscale 11, 7667 (2019)

Modelling the simultaneous increase of the conductivity and the Seebeck coefficient in highly B-doped nc-Si

X.Zianni and D.Narducci, Materials Today: Proceedings 8, 706-712 (2019)

Boron diffusion in silicon in the presence of grain boundaries and voids

A. Kanaki, X. Zianni and D. Narducci, Materials Today: Proceedings 2, 583-587 (2015)

Silicon de novo: energy filtering and enhanced thermoelectric performances of nanocrystalline silicon and silicon alloys

Dario Narducci, Stefano Frabboni and Xanthippi Zianni, Journal of Materials Chemistry C 3 12176 (2015)

Compact Model for Thermoelectric Power Factor Enhancement by Energy Barriers in a Two-phase Composite Semiconductor

X.Zianni, N.Neophytou and D.Narducci, Materials Today: Proceedings, 2, 497-503 (2015)

Parametric modeling of energy filtering by energy barriers in thermoelectric nanocomposites

X.Zianni and D. Narducci, Journal of Applied physics 117, 035102 (2015)

Monte Carlo study of the electron transport properties of an array of Si nanocrystals

I.Chouthis and X.Zianni, Materials Today: Proceedings, Volume 2, Issue 2, Pages 491-496, (2015)

Enhancement of the power factor in two-phase silicon–boron nanocrystalline alloys

D. Narducci, B. Lorenzi, X. Zianni, N. Neophytou, S. Frabboni, G. C. Gazzadi, A. Roncaglia, and F. Surian, Phys. Status Solidi A 211, 1255 (2014)

Enhancement of the power factor in two-phase silicon-boron nanocrystalline alloys

D. Narducci,B. Lorenzi, X. Zianni,.N. Neophytou, S. Frabboni, GC Gazzadi, A.Roncaglia, F. Suriano, PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 211, 1255 (2014)

Power Factor Enhancement by Inhomogeneous Distribution of Dopants in Two-Phase Nanocrystalline Systems

N. Neophytou, X. Zianni, H. Kosina, Hans, S. Frabboni, B. Lorenzi, D. Narducci, Journal of Electronic Materials 43, 1896 (2014)

Simultaneous increase in electrical conductivity and Seebeck coefficient in highly Boron-doped nanocrystalline Si

N. Neophytou, X. Zianni, H. Kosina, S. Frabboni, B. Lorenzi, and D. Narducci, Nanotechnology 24(20), 205402 (2013).

Nanograin effects on the thermoelectric properties of poly-Si nanowires

N.Neophytou, X.Zianni, M. Ferri, A. Roncaglia, G.F. Cerofolini, and D. Narducci, Journal of Electronic Materials, DOI: 10.1007/s11664-012-2424-8

Thermoelectric properties of nano-waveguides

Thermopower enhancement in modulated cross-section nanowires due to energy minibands structure

X. Zianni, Phys. Status Solidi A 211, 1315 (2014)

Band Structure Engineering in Geometry-Modulated Nanostructures for Thermoelectric Efficiency Enhancement

X. Zianni, Journal of ELECTRONIC MATERIALS, DOI: 10.1007/s11664-014-3125-2 (2014)

Thermopower enhancement in modulated cross-section nanowires due to energy minibands structure

X. Zianni, PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 211, 1315 (2014)

Large thermoelectric power factor enhancement realized in InAs nanowires

P.M. Wu, J. Gooth,X.Zianni, S. Fahlvik Svensson, K.D. Thelander, C. Thelander, K.Nielsch, H. Linke NanoLetters 13, 4080 (2013)

Disorder-induced enhancement of the thermoelectric efficiency in diameter-modulated nanowires

X.Zianni, Microelectronic Engineering, Volume 112, Special Issue: SI Pages: 235-240 ( 2013)

The effect of the modulation shape in the ballistic thermal conductance of modulated nanowires

X.Zianni, Journal of Solid State Chemistry 193 53 (2012)

Efficient thermoelectric energy conversion on quasi-localized electron states in diameter modulated nanowires

X.Zianni, Nanoscale Research Letters 6, 286 (2011)

Diameter-modulated nanowires as candidates for high thermoelectric energy conversion efficiency

X.Zianni, Applied Physics Letters 97, 233106 (2010)

Thermal conductivity and thermoelectric properties of geometry-modulated nanostructures

Thermal conductivity engineering in width-modulated silicon nanowires and thermoelectric efficiency enhancement

X.Zianni, Special issue on ‘Thermoelectric Properties of Nanostructured Materials’, J. Phys. D: Appl. Phys. 51 114003 (2018)

On the dependence of the thermal conductivity of width-modulated nanowires on the number of modulations

Xanthippi Zianni, Konstantinos Termentzidis and David Lacroix, Journal of Physics: Conf. Series 785, 012011 (2017)

Monte Carlo simulations on the thermoelectric transport properties of width-modulated nanowires

X.Zianni, Journal of Electronic Materials DOI: 10.1007/s11664-015-4217-3 (2015) [45 1779 (2016)]

Monte Carlo Simulations on the Thermoelectric Efficiency of a Si Nanowire Modulated by a Constriction

X.Zianni, Materials Today: Proceedings, Volume 3, 2016, Pages 840-846 (2016)

Designing width-modulated semiconductor nanowires for optimal thermoelectric efficiency

X. Zianni, Microelectronic Engineering 159 51 (2016)

Monte Carlo simulations of phonon transport in Si nanowires with constrictions

V. Jean, S. Fumeron, K. Termentzidis, X. Zianni, D. Lacroix, International Journal of Heat and Mass Transfer 86, 648 (2015)

Scaling behavior of the thermal conductivity of width-modulated nanowires and nanofilms for heat transfer control at the nanoscale

X. Zianni, V. Jean, K. Termentzidis and D. Lacroix, Nanotechnology 25, 465402 (2014)

Modulated SiC nanowires : Molecular Dynamics study of their thermal properties

K. Termentzidis, T. Barreteau, Y. Ni, S. Merabia, X. Zianni, Y. Chalopin, P. Chantrenne, and S. Volz, Phys. Rev. B 87, 125410 (2013)

Thermal conductivity of diameter-modulated nanowires within a frequency-dependent model for the phonon boundary scattering

X.Zianni and P.Chantrenne, Journal of Electronic Materials, DOI: 10.1007/s11664-012-2304-2 (2012) [42 1509 (2013)]

Montea Carlo simulations of thermoelectric effects

Thermal conductivity engineering in width-modulated silicon nanowires and thermoelectric efficiency enhancement

X.Zianni, Special issue on ‘Thermoelectric Properties of Nanostructured Materials’, J. Phys. D: Appl. Phys. 51 114003 (2018)

A Monte Carlo study on the effect of energy barriers on the thermoelectric properties of Si

X. Zianni, P. Chantrenne and D. Narducci , Energy Harvesting and Systems 2016, DOI 10.1515

Monte Carlo simulations on the thermoelectric transport properties of width-modulated nanowires

X.Zianni, Journal of Electronic Materials DOI: 10.1007/s11664-015-4217-3 (2015) [45 1779 (2016)]

Monte Carlo Simulations on the Thermoelectric Efficiency of a Si Nanowire Modulated by a Constriction

X.Zianni, Materials Today: Proceedings, Volume 3, 2016, Pages 840-846 (2016)

Monte Carlo study of the electron transport properties of an array of Si nanocrystals

I.Chouthis and X.Zianni, Materials Today: Proceedings, Volume 2, Issue 2, Pages 491-496, (2015)

Thermoelectric properties of quantum-dot devices

Effect of electron-phonon coupling on the thermoelectric efficiency of single-quantum-dot devices

X. Zianni, Physical Review B 82, 165302 (2010)

Thermoelectric efficiency of a quantum dot in the single-electron configuration

X.Zianni, Journal of Electronic Materials, DOI: 10.1007/s11664-009-1033-7, (2009)

Theory of the energy-spectrum dependence of the electronic thermoelectric tunneling coefficients of a quantum dot

X. Zianni, Physical Review B 78, 165327 (2008)

Calculated transport coefficients of a nanocrystal in the SET configuration

X. Zianni, phys.stat.sol (c) 5 3785 (2008)

Thermal conductance of a molecule

X.Zianni, Journal of Physics: Conference Series 92 (2007) 012058

Coulomb oscillations in the electron thermal conductance of a dot in the linear regime

X. Zianni, Physical Review B 75, 045344 (2007)

The effect of confinement on the electron thermal conductance of a nanocrystal

X. Zianni, Physica E 38, 106 (2007)

Electron thermal transport properties of a quantum dot

X. Zianni, Mater.Res.Soc.Symp.Proc. Vol 913, 0913-D04-08, (2006)

Optical properties of silicon nanostructures

Calculated optical transitions in a silicon quantum wire modulated by a quantum dot

X. Zianni and A.G. Nassiopoulou, Journal of Materials Science: Materials in Electronics, Volume 20, Issue SUPPL. 1, 68 (2009)

Photoluminescence lifetimes in Si quantum dots

X. Zianni and A.G. Nassiopoulou, Journal of Applied Physics 100, 074312 (2006)

Optical emission behavior of Si quantum dots

X. Zianni and A. G. Nassiopoulou, NATO ARW, ‘Quantum Dots: Fundamentals, Applications and Frontiers’, 369-376, B.A, Joyce et al. (eds), 2005 Springer

Οptical Properties of Si quantum wires and dots

X. Zianni and A.G. Nassiopoulou, Handbook of Theoretical and Computational Nanotechnology’, American Scientific Publishers, Edited by Michael Rieth and Wolfram Schommers,ISBN: 1-58883-042-X, Chapter 94, Pages 1-37

Calculated PL lifetimes of Si nanowires: the effect of dispersion in the crystallographic orientations

X. Zianni and A.G. Nassiopoulou, MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY 101 (1-3): 242-245 (2003)

Multi-component behavior of the Photoluminescence lifetime in porous Si

X. Zianni and A.G. Nassiopoulou, physica status solidi (a) Vol. 197 No. 2, P 311(2003)

Photoluminescence lifetime of Si quantum wires

X Zianni and A.G. Nassiopoulou, Physical Review B 66, 205323 (2002)

Directional dependence of the spontaneous emission of Si quantum wires

X Zianni and A G. Nassiopoulou, Physical Review B 65, 035326 (2002)

Interband Transitions in Si Quantum Wires grown in {100} plane

X.Zianni and A.G.Nassiopoulou, Mat.Res.Soc.Symp.Proc. Vol.638, F14.20 (2001)

Microelectronic Technology

Transport properties of polyoxometalate containing polymeric materials

N. Glezos, D.Velessiotis, G.Chaidogiannos, P.Argitis, D.Tsamakis and X. Zianni, Synth. Metals 138, 267 (2003)

Application of the partial wave expansion method in 3D low energy electron beam lithography simulation

X. Zianni, D. Velessiotis, N. Glezos and K. N. Trohidou, Microelectronic Engineering 57- 58, 297 (2001)

Magnetic properties of magnetic nanoparticles

Magnetic behavior of antiferromagnetic and composite ferro-antiferromagnetic nanoparticles

K.N. Trohidou, X. Zianni and J.A. Blackman, physica status solidi (a) 189, 305 (2002)

Magnetization reversal mechanisms in small antiferromagnetic particles

X. Zianni and K. N. Trohidou, Journal of Applied Physics 85 1050 (1999)

Surface effects on the magnetic behavior of antiferromagnetic particles

K. N. Trohidou, X. Zianni and J. A. Blackman, Journal of Applied Physics 84 2795 (1998)

Monte Carlo simulations on the coercive behavior of oxide coated ferromagnetic particles

X. Zianni and K. N. Trohidou, Journal of Physics: Condensed Matter 10 7475 (1998)

Magnetization and coercivity of antiferromagnetic particles

K. N. Trohidou, X. Zianni and J. A. Blackman, IEEE Transactions on Magnetics 34 1120 (1998)

Effect of surface anisotropy on the coercive field of small magnetic particles

X. Zianni, K. N. Trohidou and J. A. Blackman., Journal of Applied Physics 81 4738 (1997)

A Monte Carlo Simulation of the Hysteresis Behavior of small magnetic particles

X. D. Zianni and K N. Trohidou, NATO ASI ‘Magnetic Hysteresis in Novel Magnetic Materials’ 338 45 (1997)

Thermoelectric effects in 2D

Semiclassical Magnetothermopower of a two-dimensional electron gas

X. Zianni, P. N. Butcher and M. J. Kearney, Physical Review B 49 7520 (1994)

The effect of interface roughness on the transport properties of a two-dimensional electron gas in a Si-MOSFET

X. Zianni and P. N. Butcher, Journal of Physics: Condensed Matter 6 2713 (1994)

Phonons and electron-phonon scattering in quantum wells

Electron scattering by optical phonons in GaAs/AlGaAs heterostructures

X. Zianni, C. D. Simserides and G. P. Triberis, Physical Review B 55 16324 (1997)

Macroscopic behaviour of longitudinal optical phonons in an AlAs/GaAs/AlAs quantum well

X. Zianni, P. N. Butcher and I. Dharssi, Journal of Physics: Condensed Matter 4 L77 (1992)

Percolation theory - Amorphous materials: small polaron hopping conductivity

The effect of the density of states on the conductivity of the small polaron hopping regime in disordered systems

G. P. Triberis, X. Zianni , A. N. Yannacopoulos and V. C. Karavolas, Journal of Physics: Condensed Matter 3 337 (1991)

Percolation theory in disordered systems and DC conductivity

X.Zianni, 1st Degree in Physics Thesis (1989)