S
Steffen Krämer
Researcher at Centre national de la recherche scientifique
Publications - 45
Citations - 2296
Steffen Krämer is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Magnetic field & Magnetization. The author has an hindex of 19, co-authored 42 publications receiving 1964 citations. Previous affiliations of Steffen Krämer include Institut national des sciences appliquées & University of Grenoble.
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Journal ArticleDOI
Magnetic-field-induced charge-stripe order in the high-temperature superconductor YBa2Cu3Oy.
Tao Wu,Hadrien Mayaffre,Steffen Krämer,Mladen Horvatić,Claude Berthier,Walter Hardy,Walter Hardy,Ruixing Liang,Ruixing Liang,D. A. Bonn,D. A. Bonn,Marc-Henri Julien +11 more
TL;DR: Nuclear magnetic resonance measurements are reported showing that high magnetic fields actually induce charge order, without spin order, in the CuO2 planes of YBa2Cu3Oy, and it is argued that it is most probably the same 4a-periodic modulation as in stripe-ordered copper oxides.
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Incipient charge order observed by NMR in the normal state of YBa2Cu3Oy
Tao Wu,Hadrien Mayaffre,Steffen Krämer,Mladen Horvatić,Claude Berthier,Walter Hardy,Ruixing Liang,D. A. Bonn,Marc-Henri Julien +8 more
TL;DR: It is shown that the short-ranged charge order recently reported in the normal state of YBa2Cu3Oy corresponds to a truly static modulation of the charge density, and that this modulation impacts on most electronic properties, and it appears jointly with intra-unit-cell nematic, but not magnetic, order.
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Emergence of charge order from the vortex state of a high-temperature superconductor.
Tao Wu,Hadrien Mayaffre,Steffen Krämer,Mladen Horvatić,Claude Berthier,Philip L. Kuhns,A. P. Reyes,Ruixing Liang,Ruixing Liang,Walter Hardy,Walter Hardy,D. A. Bonn,D. A. Bonn,Marc-Henri Julien +13 more
TL;DR: It is shown using nuclear magnetic resonance that charge order in YBa2Cu3Oy has maximum strength inside the superconducting dome, similar to compounds of the La2-x(Sr,Ba)xCuO4 family, and that the overlap of halos of incipient charge order around vortex cores can explain the threshold magnetic field at which long-range charge order emerges.
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Thermodynamic phase diagram of static charge order in underdoped YBa2Cu3Oy
David Leboeuf,Steffen Krämer,Walter Hardy,Walter Hardy,Ruixing Liang,Ruixing Liang,D. A. Bonn,D. A. Bonn,Cyril Proust,Cyril Proust +9 more
TL;DR: In this article, a thermodynamic probe of the recently discovered charge-density-wave order in YBa2Cu3Oy reveals a biaxial modulation in magnetic fields up to 40
Journal ArticleDOI
Critical Doping for the Onset of a Two-Band Superconducting Ground State in SrTiO 3 − δ
Xiao Lin,German Bridoux,Adrien Gourgout,Gabriel Seyfarth,Steffen Krämer,M. Nardone,Benoit Fauque,Kamran Behnia +7 more
TL;DR: In this paper, a study of quantum oscillations and superconducting transition temperature was performed in doped SrTiO, where the carrier density was tuned from 1.5 to 2.5 and two critical doping levels corresponding to the filling thresholds of upper bands were identified.