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Raymond FRESARD
Phone : 0033 (0)231 45 26 09 |
After getting a degree of Physicien (1984) and a PhD in Physics from the University of Neuchâtel, Switzerland (1989), in the field of liquid and amorphous metals I moved to the University of Karlsruhe, Germany, where I started to work in the field of strongly correlated electrons. In 1994, I moved to Shimane University, Japan, where I accepted an Associate Professor position. I pursued research activities in the fields of strongly correlated electrons and bosons, and on the transport properties of amorphous metals. In 1996 I returned to the University of Neuchâtel, Switzerland, where I stayed until 2000. I then accepted a Professor position at the Institut des Sciences de la Matière et du Rayonnement, Caen, France, where I am pursuing research activities in the field of strongly correlated electrons, in close connection with experiment.
Condensed matter theory ; many-body problem ; disordered systems.
| Search of Superconductivity in strongly correlated electron systems |
| Strong electronic correlations |
| Mott transition |
| Stripe phases |
| Magnetism in transition metals and transition metal oxides |
| Transport properties of liquid and amorphous metals |
Collaborations
Dr. U. SchwingenschlÖgl (KAUST)
Prof. A. M. Oleś (Jagellonian University in Krakow)
Dr. M. Raczkowski (WÜrzburg University)
Prof. P. Wölfle (Karlsruhe Institute of Technology)
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"Approche quantique au transport dans les matériaux", Talk at l’école thèmatique CNRS ’’THERMOELECTRICITE : de la théorie au dispositif’’, Carcans Maubuisson, May. 2008. | |
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"Slave bosons in radial gauge : a bridge between the path integral and the Hamiltonian language",
Talk
at the International Conference of Theoretical Physics ``Electron
Correlations In Nano And Macrosystems’’, Ustron (PL), Sept. 2006.
| |
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"Electrons corrélés : une introduction", Talk at the Rencontre scientifique de Saint-Aubin ``Electrons fortement corrèlés’’, SOLEIL, June 2006. | |
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"Competition between filled and half-filled stripes in cuprates and nickelates", Talk at the 9th Franco-American Workshop on Complex Oxides, University of Illinois at Urbana-Champaign, January 2006. |
Publications
• P. Limelette, V. Ta Phuoc, F. Gervais et R. Frésard
ω/T scaling of the optical conductivity in strongly correlated layered cobalt oxide
Phys. Rev. B. 87, 035102 (2013).arXiv:1211.2999
•
C. Schuster, U.
Lüders, U. Schwingenschlögl, and R.
Frésard
On the ferromagnetic character of
(LaVO3)m/SrVO3
superlattices
arXiv:1211.2999
•
O. Juillet and R.
Frésard
Exotic spin, charge and pairing
correlations of the two-dimensional doped Hubbard model : a symmetry
entangled mean-field approach
arXiv:1208.6277
• R. Frésard, J. Kroha, and P. Wölfle
The pseudoparticle approach to strongly correlated electron systems
Springer Series in Solid-State Science 171, 65-101 (2012),SB_review_2011.pdf[
• R. Frésard, C. Hackenberger, and T. Kopp
Magnetic transitions in strong coupling expansions for nearly degenerate states
Ann. Phys. (Berlin) 524, xxx (2012). [arXiv:1205.0425 ]
• R. Frésard and T. Kopp
Exact results with the Kotliar-Ruckenstein slave boson representation
Ann. Phys. (Berlin) 524, 175-181 (2012),
• S. Kremer and R. Frésard
Thermoelectric transport properties of an apparent Fermi liquid :Relation to an analytic anomaly in the density of states and application to hole-doped delafossites
Ann. Phys. (Berlin) 524, 21-36 (2012), [arXiv:1110.5735]
See also : A. M. Oleś
The apparent Fermi liquid concept helps to understand thermoelectric
materials, ’’Expert Opinion’’
Ann. Phys. (Berlin) 524, A33 (2012)
• E. Guilmeau, M. Poienar, S. Kremer, S. Marinel, S, Hébert, R. Frésard, and A. Maignan
Mg substitution in CuCrO2 delafossite compounds
Solid State Commun. 151, 1798-1801 (2011), http://fr.arxiv.org/pdf/1110.5730[arXiv:1110.5730]
• M. Casas-Cabanas, M. Frésard, U. Lüders, R. Frésard, C. Schuster
et U. Schwingenschlögl
Evidence for narrow in-gap states in doped Al2O3
Chem. Phys. Lett. 515, 29-31 (2011)
• A. David, R. Frésard, Ph. Boullay, W. Prellier, U. Lüders, and P.-E.
Janolin
Structural transition in LaVO3 /SrVO3 superlattices
and its influence on the transport properties
Appl. Phys. Lett. 98, 212106 (2011). [
arXiv:1105.3560 ]
• U. Schwingenschlögl and R. Frésard
On the interrelation between bulk and thin film Fermi surfaces
EPL 92, 67007 (2010).
• P. Bogdanski, M. Halaoui, A. M. Oleś, and R. Frésard
Optical conductivity in the vicinity of a quantum critical point
Phys. Rev. B 82, 195125 (2010).
• U. Schwingenschlögl, C. Schuster, and R. Frésard
Electronic structure of a striped nickelate compound studied by
the exact exchange for correlated electrons (EECE) approach
Europhys. Lett.
88, 67008 (2009).
• U. Lüders, W. C. Sheets, A. David, W. Prellier, and R. Frésard
Room temperature magnetism in LaVO3/SrVO3
superlattices by geometrically confined doping
Phys. Rev. B
80, 241102(R) (2009). [arXiv:0912.3663].
• U. Schwingenschlögl, C. Schuster, and R. Frésard
Corundum-based transparent infrared absorbers
Chem. Phys. Lett.
481, 62 (2009).
• U. Schwingenschlögl, R. Frésard, and V. Eyert
Influence of the vacuum interface on the charge distribution in V2O3 thin films
New J. Phys.
11, 093034 (2009). [arXiv:0909.1335].
• A. Maignan, V. Eyert, C. Martin, S. Kremer, R. Frésard, and D. Pelloquin
Electronic structure and thermoelectric properties of
CuRh1-xMgxO2
Phys. Rev. B
80, 115103 (2009). [arXiv:0908.1901].
• A. Maignan, C. Martin, R. Frésard, V. Eyert, E. Guilmeau, S. Hébert, M. Poienar, and D. Pelloquin
On the strong impact of doping in the triangular antiferromagnet CuCrO2
Solid State Comm.
149, 926 (2009). [arXiv:0908.3828].
• U. Schwingenschlögl, C. Schuster, and R. Frésard
Stripe segregation and magnetic coupling in the nickelate La5/3Sr1/3NiO4
Ann. Phys. (Berlin)
18, 107 (2009). [arXiv:0902.4556].
• U. Schwingenschlögl, R. Frésard, and V. Eyert
Substrate effects on V2O3 thin films
Surface Science
603, L19 (2009). [arXiv:0812.2382].
• R. Frésard and Th. Kopp
Exact results in a slave boson saddle point approach for a strongly correlated electron model
Phys. Rev. B
78, 073108 (2008). [arXiv:0806.1101].
• V. Eyert, R. Frésard, and A. Maignan
Long-range magnetic order and spin-lattice coupling in the delafossite
CuFeO2
Phys. Rev. B
78, 052402 (2008). [arXiv:0801.4787].
• P. Limelette, S. Hébert, H. Muguera, R. Frésard, and Ch. Simon,
Dual electronic states in thermoelectric cobalt oxide Bi1.7Ca2O4]0.59CoO2
Phys. Rev. B
77, 235118 (2008).
• R. Frésard, H. Ouerdane, and T. Kopp
Barnes slave boson approach to the two-site single impurity
Anderson model with non-local interaction
Europhys. Lett.
82, 31001 (2008). [arXiv:0801.4496].
• V. Eyert, R. Frésard, and A. Maignan
On the metallic conductivity of the delafossites
PdCoO2 and PtCoO2
Chem. Matter.
20, 2370 (2008). [arXiv:0801.4077].
• U. Schwingenschlögl, C. Schuster, and R. Frésard
Magnetic ordering in the striped nickelate
La5/3Sr1/3NiO4 : A band structure point of view
Europhys. Lett.
81, 27002 (2008). [arXiv:0711.1599].
• C. Grygiel, Ch. Simon, B. Mercey, W. Prellier, R. Frésard, and P. Limelette
Thickness-dependence of the electronic properties in V2O3
thin films
Appl. Phys. Lett.
91, 262103 (2007). [arXiv:0709.0692].
• R. Frésard, H. Ouerdane, and Th. Kopp
Slave bosons in radial gauge : a bridge between path integral and hamiltonian
language
Nucl. Phys. B
785, 286 (2007). [cond-mat/0701626].
• M. Raczkowski, M. Capello, D. Poilblanc, R. Frésard, and A. M. Oleś
Unidirectional d-wave superconducting domains in the two-dimensional t-J model
Phys. Rev. B
76, 140505(R) (2007). [arXiv:0708.0788].
• M. Miclau, J. Hejtmanek, R. Retoux, K. Knizek, Z. Jirak, R. Frésard,
A. Maignan, S. Hébert, M. Hervieu, and C. Martin
Structural and magnetic transitions in CaMn1-xWxO3
Chem. Matter.
19, 4243 (2007).
• M. Raczkowski, R. Frésard, and A. M. Oleś
Effect of the next-nearest neighbor hopping on the stability and
band structure of the incommensurate phases in the cuprates
phys. stat. sol. (b)
244, 2521-2526 (2007). [cond-mat/0609479].
• V. Hardy, D. Flahaut, R. Frésard, and A. Maignan
Anisotropic susceptibility of the geometrically frustrated
spin-chain compound Ca3Co2O6
J. Phys. : Condens. Matter
19, 145229 (2007). [cond-mat/0701192].
• M. Raczkowski, D. Poilblanc, R. Frésard, and A. M. Oleś
Spin-rotationally symmetric domain flux phases in underdoped cuprates
Phys. Rev. B
75, 094505 (2007). [cond-mat/0608441].
• V. Eyert, U. Schwingenschlögl, R. Frésard, A. Maignan, C. Martin,
N. Nguyen, C. Hackenberger, and T. Kopp
The antiferromagnetic insulator Ca3FeRhO6 : characterization and electronic structure calculations
Phys. Rev. B
75, 115105 (2007). [cond-mat/0610120].
• P. Limelette, S. Hébert, V. Hardy, R. Frésard, Ch. Simon, and
A. Maignan
Scaling behavior in thermoelectric misfit cobalt oxides
Phys. Rev. Lett.
97, 046601 (2006). [cond-mat/0608264].
• M. Raczkowski, R. Frésard, and A. M. Oleś
Interplay between incommensurate phases in the cuprates
Europhysics Lett. 76, 128 (2006). [cond-mat/0606059].
• M. Raczkowski, R. Frésard, and A. M. Oleś
Magnetic and orbital correlations in a two-site molecule
J. Phys. : Condens. Matt. 18, 7449 (2006). [cond-mat/0608271].
• M. Raczkowski, R. Frésard, and A. M. Oleś
Slave-boson approach to the metallic stripe phases with
large unit cells
Phys. Rev. B
73, 174525 (2006). [cond-mat/0605706].
• M. Raczkowski, R. Frésard, and A. M. Oleś
Microscopic origin of diagonal stripe phases in doped nickelates
Phys. Rev. B
73, 094429 (2006). [cond-mat/0604238].
• M. Raczkowski, A. M. Oleś, and R. Frésard
Stripe phases - possible ground state of the high-Tc superconductors
Fizika
Nizkikh Temperatur 32, 411 (2006) (Low. Temp. Phys. 32, 305 (2006)). [cond-mat/0512420].
• V. Eyert, U. Schwingenschlögl, C. Hackenberger, T. Kopp, R. Frésard, and
U. Eckern
Magnetic ordering in trigonal chain compounds
Prog. Solid
State 36, 156 (2008). [cond-mat/0509374].
• H.W Eng, P. Limelette, W. Prellier, Ch. Simon, and R. Frésard
Unconventional Hall effect in oriented Ca3Co4O9 thin films
Phys. Rev. B
73, 033403 (2006). [cond-mat/0511374].
• M. Raczkowski, A. M. Oleś, and R. Frésard
Half-filled stripes in the t-t’-U Hubbard model
phys. stat. sol. (b)
243, 128-132 (2006). [cond-mat/0511100].
• P. Limelette, V. Hardy, P. Auban-Senzier, D. Jérome, D. Flahaut, S. Hébert, R. Frésard, Ch. Simon, J. Noudem, and A. Maignan
Strongly correlated properties of the thermoelectric cobalt oxide Ca3Co4O9
Phys. Rev. B
71, 233108 (2005). [cond-mat/0505464].
• R. Frésard, M. Raczkowski, and A. M. Oleś
Interplay of orbitally polarized and magnetically ordered phases in doped transition metal oxides
phys. stat. sol. (b)
242, 370-376 (2005). [cond-mat/0502158].
• S. Mercone, R. Frésard, V. Caignaert, Ch. Martin, D. Saurel,
C. Simon, G. André, Ph. Monod, and F. Fauth
Non-linear effects and Joule heating in I-V curves in manganites
J. Appl. Phys.
98, 023911 (2005). [cond-mat/0506448 ].
• V. Eyert, C. Laschinger, Th.Kopp, and R. Frésard
Extended moment formation and magnetic ordering in the trigonal chain compound Ca3Co2O6
Chem. Phys. Lett.
385, 249-254 (2004). [cond-mat/0401004].
• R. Frésard, C. Laschinger, Th.Kopp, and V. Eyert
The Origin of Magnetic Interactions in Ca3Co2O6
Phys. Rev. B
69, 140405(R) (2004). [cond-mat/0309031].
• R. Frésard and M. Lamboley
Ferromagnetism in a Realistic Two-Band Model : A Slave Boson Study
J. Low Temp. Phys.
126, 1091-1105 (2002). [cond-mat/0109543].
• R. Frésard, Ch. Martin, S. Hébert, A. Maignan, L. Pi,
B. Raveau and J. Hejtmanek
Modeling of the Thermopower of Electron-Doped Manganites
Phys. Lett. A
303, 223-228 (2002).
• B. Raveau, S. Hébert, A. Maignan, R. Frésard, M. Hervieu, and D. Khomskii
Rhodium Doped Manganites : Ferromagnetism and Metallicity
J. Appl. Phys.
90, 1297-1302 (2001). [cond-mat/0105347].
• S.
Hébert, A. Maignan, R. Frésard, M. Hervieu, R. Retoux, Ch. Martin, and B. Raveau
Induced Ferromagnetism and Colossal Magnetoresistance by Ir-Doping in Pr1-xCaxMnO3
Eur. Phys. J. B
24, 85-89 (2001). [cond-mat/0112118].
• R. Frésard and Th. Kopp
Slave Bosons in Radial Gauge : the Correct Functional Integral
Representation and Inclusion of Non-Local Interactions
Nucl. Phys. B
594, 769-789 (2000). [cond-mat/0011296].
• R. Frésard and A. Ruckenstein
Superconducting and magnetic fluctuations of the two-dimensional
Hubbard model
Physica B
281-282, 890-891 (2000).
• M. Hengsberger, R. Frésard, D. Purdie, P. Segovia, and Y. Baer
Electron-Phonon Coupling in Photoemission Spectra
Phys. Rev. B
60, 10 796-10 802 (1999).
• M. Yu. Kagan, R. Frésard, M. Capezzali, and H. Beck
One-electron Spectral Function of the Attractive Hubbard Model for Intermediate Coupling
Phys. Rev. B
57, 5995-6002 (1998). [cond-mat/9704136].
• W. Zimmermann and R. Frésard
Spin and charge dynamics of the 2-dimensional t-t’-U Model
Phys. Rev. B
58, 15 288-15 291 (1998). [cond-mat/9812242].
• R. Frésard and G. Kotliar
Interplay of Mott
Transition and Ferromagnetism in the Orbitally Degenerate
Hubbard Model
Phys. Rev. B
56, 12 909-12 915
(1997). [cond-mat/9612172].
• W. Zimmermann, R. Frésard, and P. Wölfle
Spin and Charge Structure Factors of the 2-d Hubbard Model
Phys. Rev. B
56, 10 097-10 104 (1997). [cond-mat/9705088].
• U. Werner and R. Frésard
Temperature
Dependence
of Transport Coefficients in Liquid and Amorphous Metals
Z. Phys. B-Condens. Matter
104, 379-386 (1997). [cond-mat/9605089].
• R. Frésard and P. Wölfle
Unified Slave Boson Representation of Spin and Charge Degrees of
Freedom for Strongly Correlated Fermi Systems
Int. J. Mod. Phys. B
6, 685 (1992).