Charge order and suppression of superconductivity in HgBa2CuO4+d at high pressures

Autor: Robert Comes, Pierre Fertey, Stephan Megtert, Manuel Izquierdo, J. P. Itié, Helene Raffy, Sylvain Ravy, Anne Forget, Dorothée Colson, Daniele C. Freitas, Manuel Núñez-Regueiro, Gaston Garbarino

Publikováno v: 'Condensed Matter ', vol: 6, pages: 25-1-25-7 (2021)
Condensed Matter
Condensed Matter, 2021, 6 (3), pp.25. ⟨10.3390/condmat6030025⟩
Condensed Matter, Vol 6, Iss 25, p 25 (2021)

New insight into the superconducting properties of HgBa2CuO4 (Hg-1201) cuprates is provided by combined measurements of electrical resistivity and single crystal X-ray diffraction under pressure. The changes induced by increasing pressure up to 20 GP

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19d6aeb4ba78bfafd5db1495d99c75bc
https://epn-library.esrf.fr/flora/jsp/index_view_direct_anonymous.jsp?record=doc:PUB_ESRF:58735

One dimensional ordering of doping oxygen in HgBa2Cuo4+δ superconductors evidenced by X-ray diffuse scattering

Autor: S. Megtert, M. Izquierdo, Dorothée Colson, Veijo Honkimäki, A. Forget, R. Comes, Helene Raffy

Publikováno v: Journal of Physics and Chemistry of Solids. 72:545-548

X-ray diffuse scattering experiments on single CuO 2 layer Hg high T c superconductors ( HgBa 2 CuO 4 + δ ) near optimal doping level have revealed that the doping oxygen atoms of this system form very long and isolated chains (extending over 75 uni

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ae1a760ab3b746e43aff0da767dd58d0
https://doi.org/10.1016/j.jpcs.2010.10.055

Approaching the limit of Cu(II)/Cu(I) mixed valency in a Cu(I)Br2-N-methylquinoxalinium hybrid compound

Autor: Helene Raffy, Pascale Auban-Senzier, Claude Pasquier, Stephen Sproules, Nicolas Leblanc, Annie K. Powell

Publikováno v: Chemical communications (Cambridge, England). 51(64)

A novel 1D hybrid salt (MQ)[CuBr2]∞ (MQ = N-methylquinoxalinium) is reported. Structural, spectroscopic and magnetic investigations reveal a minimal Cu(II) doping of less than 0.1%. However it is not possible to distinguish Cu(I) and Cu(II). The un

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d9126bb41c178ebd93d75c2707fa7d5
https://pubmed.ncbi.nlm.nih.gov/26120783

Evolution of the pseudogap from Fermi arcs to the nodal liquid

Autor: Mohit Randeria, Helene Raffy, Kazuo Kadowaki, Takashi Takahashi, H. M. Fretwell, Stephan Rosenkranz, M. Shi, Seigo Souma, Juan Carlos Campuzano, Zhao-Shen Li, Adam Kaminski, Takafumi Sato, Amit Kanigel, D. G. Hinks, Utpal Chatterjee, Michael R. Norman, Lutfi Ozyuzer

Publikováno v: Nature Physics. 2:447-451

The response of a material to external stimuli depends on its low-energy excitations. In conventional metals, these excitations are electrons on the Fermi surface—a contour in momentum (k) space that encloses all of the occupied states for non-inte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75ecdc44b6e036365176ee97c1810618
https://doi.org/10.1038/nphys334

Current dependent fluctuations in a Bi2Sr2CuO6+δ thin film

Autor: Helene Raffy, Z. Z. Li, I. Sfar, F. Bouquet, L. Fruchter

Publikováno v: The European Physical Journal B. 46:215-221

The current dependence of the excess conductivity is measured up to $\simeq 3 T_c$ for a Bi$_2$Sr$_2$CuO$_{6+\delta}$ thin film, as a function of doping. It is found to be anomalously sensitive to the transport current and to behave as a universal fu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05313b6a07799e1ae3b6d6db84245322
https://doi.org/10.1140/epjb/e2005-00224-2