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Electronic Correlations and High Pressures

 

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Strongly correlated electron systems present a large number of electronic phase transitions in intermediate mixed valence oxides, spin ladders or molecular conductors. Despite slight differences in crystalline structures, common features are observed that is Mott insulator-metal transition or the competition of superconductivity with other ground states.

The activity of the group is devoted to the study of the various instabilities in these compounds as a function of the applied hydrostatic pressure using various experimental facilities.

Research domains

- Strongly correlated electron systems
- Mott insulator-metal transition
- Unconventional superconductivity
- Phase coexistence
- Quantized Hall effect

Materials

- Molecular conductors
- Mixed valence oxides
- Spin ladder compounds

Experimental techniques

- Nuclear magnetic resonance
- Electronic transport
- Helium gas hydrostatic pressure
- Clamp cell hydrostatic pressure
- Cryogeny (dilution and 3He refrigerators)
- Ultrasonic measurements

 

Recent publications:
 

2020


  • Ashoka Sahadevan S, Abhervé A, Monni N, et al. Radical Cation Salts of Tetramethyltetrathiafulvalene (TM-TTF) and Tetramethyltetraselenafulvalene (TM-TSF) with Chlorocyananilate-Based Anions. Crystal Growth & Design. 2020;20(10):6777-6786.

  • Chu H, Kim M-J, Katsumi K, et al. Phase-resolved Higgs response in superconducting cuprates. Nature Communications. 2020;11(1):1793.

  • El-Ghayoury A, Mézière C, Simonov S, et al. Glycine Residue Twists HOMO···HOMO Interactions in a Molecular Conductor. Crystal Growth & Design. 2020;20(5):3546-3554.

  • Frąckowiak A, Barszcz B, Olejniczak I, et al. Mixed valence trimers in cation radical salts of TMTTF with the planar bis(6-sulfo-8-quinolato) platinum complex [Pt(qS) <sub>2</sub> ] <sup>2−</sup>. New Journal of Chemistry. 2020;44(36):15538-15548.

  • Katsumi K, Li ZZ, Raffy H, Gallais Y, Shimano R. Superconducting fluctuations probed by the Higgs mode in Bi 2 Sr 2 Ca Cu 2 O 8 + x thin films. Physical Review B. 2020;102(5):054510.


  • Mroweh N, Auban-Senzier P, Vanthuyne N, et al. Chiral Conducting Me-EDT-TTF and Et-EDT-TTF-Based Radical Cation Salts with the Perchlorate Anion. Crystals. 2020;10(11):1069. Available at: https://www.mdpi.com/2073-4352/10/11/1069. Accessed December 22, 2020.

  • Mroweh N, Mézière C, Pop F, et al. In Search of Chiral Molecular Superconductors: κ‐[( S,S)‐DM‐BEDT‐TTF] (2) ClO(4) Revisited. Advanced Materials. 2020:2002811.

  • Mroweh N, Pop F, Mézière C, et al. Combining Chirality and Hydrogen Bonding in Methylated Ethylenedithio-Tetrathiafulvalene Primary Diamide Precursors and Radical Cation Salts. Crystal Growth & Design. 2020;20(4):2516-2526.

  • Revelli Beaumont M, Faulmann C, de Caro D, et al. Reproducible nanostructuration of the superconducting κ-(BEDT-TTF)2Cu(NCS)2 phase. Synthetic Metals. 2020;261:116310.

  • Rodríguez-Fortea A, Canadell E, Wzietek P, et al. Nanoscale rotational dynamics of four independent rotators confined in crowded crystalline layers. Nanoscale. 2020;12(15):8294-8302.