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CHAMPAGNE SIGNED

Charge orders, Magnetism and Pairings in High Temperature Superconductors

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EC-Contrib. €

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Project "CHAMPAGNE" data sheet

The following table provides information about the project.

Coordinator
COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES 

Organization address
address: RUE LEBLANC 25
city: PARIS 15
postcode: 75015
website: www.cea.fr

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Total cost 1˙318˙145 €
 EC max contribution 1˙318˙145 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-AdG
 Funding Scheme ERC-ADG
 Starting year 2016
 Duration (year-month-day) from 2016-08-01   to  2021-07-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES FR (PARIS 15) coordinator 1˙318˙145.00

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 Project objective

For nearly thirty years, the search for a room-temperature superconductor has focused on exotic materials known as cuprates, obtained by doping a parent Mott insulator, and which can carry currents without losing energy as heat at temperatures up to 164 Kelvin. Conventionally three main players were identified as being crucial i) the Mott insulating phase, ii) the anti-ferromagnetic order and iii) the superconducting (SC) phase. Recently a body of experimental probes suggested the presence of a fourth forgotten player, charge ordering-, as a direct competitor for superconductivity. In this project we propose that the relationship between charge ordering and superconductivity is more intimate than previously thought and is protected by an emerging SU(2) symmetry relating the two. The beauty of our theory resides in that it can be encapsulated in one simple and universal “gap equation”, which in contrast to strong coupling approaches used up to now, can easily be connected to experiments. In the first part of this work, we will refine the theoretical model in order to shape it for comparison with experiments and consistently test the SU(2) symmetry. In the second part of the work, we will search for the experimental signatures of our theory through a back and forth interaction with experimental groups. We expect our theory to generate new insights and experimental developments, and to lead to a major breakthrough if it correctly explains the origin of anomalous superconductivity in these materials.

 Publications

year authors and title journal last update
List of publications.
2017 X. Montiel, T. Kloss, C. Pépin
Local particle-hole pair excitations by SU(2) symmetry fluctuations
published pages: , ISSN: 2045-2322, DOI: 10.1038/s41598-017-01538-1
Scientific Reports 7/1 2019-06-13
2017 C. Morice, X. Montiel, C. Pépin
Evolution of Hall resistivity and spectral function with doping in the SU(2) theory of cuprates
published pages: , ISSN: 2469-9950, DOI: 10.1103/PhysRevB.96.134511
Physical Review B 96/13 2019-04-18
2017 X. Montiel, T. Kloss, C. Pépin
Effective SU(2) theory for the pseudogap state
published pages: , ISSN: 2469-9950, DOI: 10.1103/PhysRevB.95.104510
Physical Review B 95/10 2019-04-18
2018 Debmalya Chakraborty, Corentin Morice, Catherine Pépin
Phase diagram of the underdoped cuprates at high magnetic field
published pages: , ISSN: 2469-9950, DOI: 10.1103/PhysRevB.97.214501
Physical Review B 97/21 2019-04-18
2017 X. Montiel, C. Pépin
Model for the neutron resonance in HgBa 2 CuO 4 + δ
published pages: , ISSN: 2469-9950, DOI: 10.1103/PhysRevB.96.094529
Physical Review B 96/9 2019-04-18
2018 C. Morice, D. Chakraborty, C. Pépin
Collective mode in the SU(2) theory of cuprates
published pages: , ISSN: 2469-9950, DOI: 10.1103/physrevb.98.224514
Physical Review B 98/22 2019-04-18
2018 C Morice, D Chakraborty, X Montiel, C Pépin
Pseudo-spin skyrmions in the phase diagram of cuprate superconductors
published pages: 295601, ISSN: 0953-8984, DOI: 10.1088/1361-648X/aacc0f
Journal of Physics: Condensed Matter 30/29 2019-04-18

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