Conferences and Schools attended
1. 'II Training Course in the Physics of Correlated Systems and High Tc Superconductors', Vietri sul Mare (SA) - Italy, October 13-24, 1997.
2. 'XXth IUPAP International Conference on Statistical Physics' (STATPHYS20), Paris, France, July 20-24, 1998.
3. 'III Training Course in the Physics of Correlated Systems and High Tc Superconductors', Vietri sul Mare (SA) - Italy, September 12-25, 1998.
4. 'LXXXIV Congresso Nazionale della Società Italiana di Fisica', Salerno - Italy, September 28-October 2, 1998.
5. '81st Statistical Mechanics Meeting', Rutgers University, New Jersey (USA), May 9-10, 1999.
6. 'Localization 99: Disorder and Interaction in Transport Phenomena', Hamburg, Germany, July 29 - August 3, 1999.
7. 'IV Training Course in the Physics of Correlated Systems and High Tc Superconductors', Vietri sul Mare (SA) - Italy, October 11-22, 1999.
8. 'General Conference of the Condensed Matter Division of the European Physical Society' (EPS-CMD18), Montreux, Switzerland, March 13-17, 2000.
9. 'MECO26 - Middle European Cooperation in Statistical Physics', Prague, Czech Republic, March 8-10, 2001.
10. 'STATPHYS21 - 21st IUPAP International Conference in Statistical Physics', Cancun, Mexico, July 15-21, 2001.
11. 'Ruthenate and rutheno-cuprate materials: theory and experiments', Vietri sul Mare (SA), Italy, October 25-27, 2001.
12. 'TH2002 - International Conference on Theoretical Physics', Paris, France, July 22-27, 2002.
13. 'Highlights in Condensed Matter Physics', Salerno, Italy, May 9-11, 2003.
14. 'Progress in nonequilibrium statistical Physics and disordered systems', Université Henri Poincaré, Nancy, France, May 21-22, 2003.
15. 'International Workshop and Seminar on Quantum Phase Transitions', Max Planck Institute, Dresden, Germany, June 23 - July 12, 2003.
16. '30éme anniversaire de la Fondation Louis De Broglie', Peyresq, France, September 1-6, 2003.
17. 'VIII Training Course in the Physics of Correlated Systems and High Tc Superconductors', Vietri sul Mare (SA), October 6-17, 2003.
18. 'IX Training Course in the Physics of Correlated Systems and High Tc Superconductors', Vietri sul Mare (SA), October 4-15, 2004.
19. Workshop on "Quantum Criticality", Lorentz Center, Leiden, The Netherland, August 7-19, 2006
20. 'XII Training Course in the Physics of Correlated Systems', Vietri sul Mare (SA), October 1-12, 2007.
21. 'International workshop and seminar on Unconventional Phases and Phase Transitions in Strongly Correlated Electron Systems (UPPT08)', Max Planck Institute, Dresden, Germany, June 3-13 2008.
22. '25th International Conference on Low Temperature Physics (LT25)', Amsterdam, Olanda, August 6-13, 2008.
23. 'XCVI Congresso Nazionale della Società Italiana di Fisica', Bologna, Italy, September 20-24, 2010.
24. 'XCVII Congresso Nazionale della Società Italiana di Fisica', L'Aquila, Italy, September 26-30, 2011.
25. 'QUAM - Quantum Matter from the Nano- to the Macroscale ', Max Planck Institute, Dresden, Germany, June 24 - July 6, 2012.
26. 'MBT17 - XVII International Conference on Recent Progress in Many-Body Theories', Rostock , Germany, September 8-13, 2013.
27. 'APS - March Meeting 2014', Denver, Colorado (USA), March 3-7, 2014.
28. 'SCES 14 - International Conference on Strongly Correlated Electron Systems', Grenoble, Francia, July 7-11, 2014.

[back to CV]

 

Contributions to conferences
"Spin-glass effects on critical behavior in systems with correlated disorder",
L. De Cesare, M. T. Mercaldo, STATPHYS20, Paris (1998).
"Effetti di rottura di simmetria delle repliche sul comportamento critico di sistemi classici e quantistici con disordine correlato",
L. De Cesare, M. T. Mercaldo, LXXXIV Congresso Nazionale SIF, Salerno (1998).
"Quantum phase transitions with “time” dependent random potential",
M.T. Mercaldo,L. De Cesare, MECO26, Prague (2001).
"Exact scaling behavior in disordered itinerant quantum ferromagnets",
S. L. Sessions, D. Belitz, T. R. Kirkpatrick, M. T. Mercaldo, APS March Meeting, Seattle (2001).
"Transport anomalies and marginal Fermi-liquid effects at a quantum critical point" ,
D. Belitz, S. L. Sessions, T. R. Kirkpatrick, M. T. Mercaldo, R. Narayanan, T. Vojta, Many-Body 11, Manchester (2001).
"Exotic quantum phase transition in systems with quenched disorder",
M.T. Mercaldo, L. De Cesare, STATPHYS21, Cancun (2001).
"Quantum critical behavior in disordered itinerant ferromagnets",
M.T. Mercaldo,D. Belitz, T. R. Kirkpatrick, S. L. Sessions, STATPHYS21 Cancun (2001).
"Self-consistent approach to quenched impurity effects on quantum phase transition",
M.T. Mercaldo, L. De Cesare, TH2002, Paris (2002).
"Weak Localization Effects at the Quantum Ferromagnetic Transition",
S. L. Sessions, D. Belitz, T. R. Kirkpatrick, M. T. Mercaldo, Localization2002, Tokyo (2002).
"Disorder induced rounding of the phase transition in the large q-state Potts model",
M.T. Mercaldo, J-Ch. Anglès d'Auriac, F. Iglói, MECO29, Bratislava (2004).
"Critical behavior of Random Bond Potts model in the limit of infinite number of states",
M.T. Mercaldo, J-Ch. Anglès d'Auriac, F. Iglói, Congresso del Dipartimento di Fisica, Università di Salerno (2004).
"Influence of Generic Scale Invariance on Quantum Critical Behavior: The Case of Itinerant Ferromagnets",
D.Belitz, T.R. Kirkpatrick, M.T. Mercaldo, J. Rollbühler, S. Sessions, T. Vojta, WE-Heraeus-Seminar on Quantum Phase Transitions , Bad Honnef, Germania (2004).
"Critical and tricritical singularities of the 3D random-bond Potts model for large q",
M.T. Mercaldo, J-Ch. Anglès d'Auriac, F. Iglói, Congresso del Dipartimento di Fisica, Università di Salerno (2005).
"Field-Induced Quantum Criticality (BEC of magnons)",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, Congresso del Dipartimento di Fisica, Università di Salerno (2006).
"Unified static renormalization-group treatment of finite-temperature crossovers close to a quantum critical point",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, Congresso del Dipartimento di Fisica, Università di Salerno (2008).
"Field induced quantum criticality of a spin-1/2 planar ferromagnet",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, International Workshop UPPT08, Max Plank Institute, Dresden, Germany (2008).
"Self-consistent approach to quenched impurity effects on quantum phase transitions",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, International Conference LT25, Amsterdam, The Netherlands, (2008).
"Field induced quantum criticality of a spin-1/2 planar ferromagnet",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, International Conference LT25, Amsterdam, The Netherlands, (2008).
"Quantum-Griffiths-like singularities from a non-conventional renormalization group analysis",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, Congresso del Dipartimento di Fisica, Università di Salerno (2009).
"Classical-to-quantum crossover in the transverse Ising model via an effective Wilsonian RG approach",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, XCVI Congresso Nazionale SIF, Bologna (2010).
"Field-induced quantum critical scenario of a planar ferromagnet with long-range interaction: a two-time Green’s function framework",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, XCVII Congresso Nazionale SIF, L’Aquila (2011).
"Low-temperature behavior close to a Quantum Tricritical Point",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, QUAM, Dresda, Germania (2012).
"Transizioni di fase quantistiche: studi nelle regioni di influenza di punti critici e tricritici quantistici ",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, Congresso del Dipartimento di Fisica, Università di Salerno(2012).
"Magnetic-field-induced quantum criticality in a spin-S planar ferromagnet with single-ion anisotropy",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, MBT17, Rostock, Germania, (2013).
"Magnetic-field-induced quantum criticality in a spin-1 planar ferromagnet with single-ion anisotropy",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, APS-march meeting '14, Denver, Colorado (USA), (2014).
"Reentrant phenomena in a three-dimensional spin-1 planar ferromagnet with easy-axis single-ion anisotropy",
M.T. Mercaldo, I. Rabuffo, L. De Cesare, A. Carmico D'Auria, SCES'14, Grenoble, Francia, (2014).

[back to CV]

 

Seminars
"Replica symmetry breaking effects and replicon modes in systems with correlated disorder", University of Oregon, Eugene, Oregon (USA), May 25, 1999.
"Quantum phase transitions and quenched disorder effects", Università di Salerno, Baronissi (SA), Italy, December 13, 2000.
"Quantum critical behavior of disordered itinerant ferromagnets", LPM2C - CNRS, Grenoble, France, June 18, 2003.
"Critical behavior of Random Bond Potts model in the limit of infinite number of states", Università di Salerno, Baronissi (SA), Italy, April 19, 2004.

[back to CV]

 

 

 

 

 

 

 

 

 

 

 

 

 

Critical phenomena in classical systems with extended disorder and replica symmetry breaking effects

We have studied the critical behavior of classical systems with quenched disorder using renormalization group technique.
In particular we have analyzed the critical properties of a system with anisotropic disorder (i.e. disorder which is short-range correlated in some directions and decays as power law in the remaining ones).
Phys. Lett. A 264, 214 (1999).
We have also investigated the effects of the Parisi replica symmetry breaking scheme on critical behavior of a d-dimensional system with extended impurities.
Phys. Rev. B 59, 855 (1999); ibidem 60, 2976 (1999).
[back to CV]

Quantum critical behavior of itinerant disordered ferromagnets

The theory of QPT, i.e. phase transitions that occur at zero temperature driven by a non-thermal parameter, is an important problem which is relevant in many topics in condensed matter physics.
The presence of quenched disorder introduces in this problem additional troubles and several still open questions, especially concerning the effective role played by the competition between quantum and disorder fluctuations.
One of the most obvious example of QPT is perhaps the T=0 transition from a paramagnet to an itinerant ferromagnet. For this problem an effective field theory has been derived, keeping explicitly all soft modes [Phys. Rev. B 63, 174427 (2001)]. The solution of this effective field theory, has allowed to determine the quantum critical behavior of this systems and its consequences on the transport properties [Phys. Rev. B 63, 174428 (2001)].
[back to CV]

Numerical analysis (using Combinatorial Optimization and Monte Carlo methods) of disordered classical systems

(see cond-mat/0312532
or italian version)
[back to CV]