H. Mayaffre
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View article: Robust Charge Density Wave Correlations in Optimally Doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">y</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:mrow></mml:math>
Robust Charge Density Wave Correlations in Optimally Doped Open
Charge density wave (CDW) order is a key property of high-T_{c} cuprates, but its boundaries in the phase diagram and potential connections to other phases remain controversial. We report nuclear magnetic resonance (NMR) measurements in th…
View article: Spin-Stripe Order Tied to the Pseudogap Phase in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>La</mml:mi></mml:mrow><mml:mrow><mml:mn>1.8</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mrow><mml:msub><mml:mrow><mml:mi>Eu</mml:mi></mml:mrow><mml:mrow><mml:mn>0.2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Sr</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>CuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:mrow></mml:math>
Spin-Stripe Order Tied to the Pseudogap Phase in Open
Although spin and charge stripes in high-Tc cuprates have been extensively studied, the exact range of carrier concentration over which they form a static order remains uncertain, complicating efforts to understand their significance. The …
View article: Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4
Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4 Open
Although spin and charge stripes in high-Tc cuprates have been extensively studied, the exact range of carrier concentration over which they form a static order remains uncertain, complicating efforts to understand their significance. In L…
View article: Magnetic and structural properties of the iron silicide superconductor LaFeSiH
Magnetic and structural properties of the iron silicide superconductor LaFeSiH Open
The magnetic and structural properties of the recently discovered pnictogen/chalcogen-free superconductor LaFeSiH have been investigated by 57Fe synchrotron M & ouml;ssbauer source spectroscopy, X-ray and neutron powder diffraction, and 29…
View article: Signatures of two gaps in the spin susceptibility of a cuprate superconductor
Signatures of two gaps in the spin susceptibility of a cuprate superconductor Open
A major obstacle to understanding high-Tc cuprates is that superconductivity precludes observing normal-state properties at low temperatures. One prime example is the normal-state spin susceptibility \c{hi}spin: although its decrease upon …
View article: Magnetic and structural properties of the iron silicide superconductor LaFeSiH
Magnetic and structural properties of the iron silicide superconductor LaFeSiH Open
The magnetic and structural properties of the recently discovered pnictogen/chalcogen-free superconductor LaFeSiH ($T_c\simeq10$~K) have been investigated by $^{57}$Fe synchrotron M{ö}ssbauer source (SMS) spectroscopy, x-ray and neutron po…
View article: Competition between spin ordering and superconductivity near the pseudogap boundary in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mtext>−</mml:mtext><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>: Insights from NMR
Competition between spin ordering and superconductivity near the pseudogap boundary in : Insights from NMR Open
International audience
View article: Superconductivity in the crystallogenide LaFeSiO1−δ with squeezed FeSi layers
Superconductivity in the crystallogenide LaFeSiO1−δ with squeezed FeSi layers Open
Pnictogens and chalcogens are both viable anions for promoting Fe-based superconductivity, and intense research activity in the related families has established a systematic correlation between the Fe-anion height and the superconducting c…
View article: Competition between spin ordering and superconductivity near the pseudogap boundary in La2-xSrxCuO4: insights from NMR
Competition between spin ordering and superconductivity near the pseudogap boundary in La2-xSrxCuO4: insights from NMR Open
When superconductivity is suppressed by high magnetic fields in La2-xSrxCuO4, striped antiferromagnetic (AFM) order becomes the magnetic ground state of the entire pseudogap regime, up to its end at the doping p* [M. Frachet, I. Vinograd e…
View article: High magnetic field ultrasound study of spin freezing in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>1.88</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mrow><mml:mn>0.12</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>
High magnetic field ultrasound study of spin freezing in Open
High-$T_{\\rm{c}}$ cuprate superconductors host spin, charge and lattice instabilities. In particular, in the antiferromagnetic glass phase, over a large doping range, lanthanum based cuprates display a glass-like spin freezing with antife…
View article: Singular magnetic anisotropy in the nematic phase of FeSe
Singular magnetic anisotropy in the nematic phase of FeSe Open
View article: High magnetic field ultrasound study of spin freezing in La$_{1.88}$Sr$_{0.12}$CuO$_4$
High magnetic field ultrasound study of spin freezing in La$_{1.88}$Sr$_{0.12}$CuO$_4$ Open
High-$T_{\rm{c}}$ cuprate superconductors host spin, charge and lattice instabilities. In particular, in the antiferromagnetic glass phase, over a large doping range, lanthanum based cuprates display a glass-like spin freezing with antifer…
View article: Nuclear magnetic resonance study of charge density waves under hydrostatic pressure in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>YBa</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Cu</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mi>y</mml:mi></mml:msub></mml:mrow></mml:math>
Nuclear magnetic resonance study of charge density waves under hydrostatic pressure in Open
International audience
View article: Detection of a Disorder-Induced Bose-Einstein Condensate in a Quantum Spin Material at High Magnetic Fields
Detection of a Disorder-Induced Bose-Einstein Condensate in a Quantum Spin Material at High Magnetic Fields Open
The coupled spin-1 chains material NiCl_{2}-4SC(NH_{2})_{2} (DTN) doped with Br impurities is expected to be a perfect candidate for observing many-body localization at high magnetic field: the so-called "Bose glass," a zero-temperature bo…
View article: Unusual Interplay between Superconductivity and Field-Induced Charge Order in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mi>y</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:mrow></mml:math>
Unusual Interplay between Superconductivity and Field-Induced Charge Order in Open
We present a detailed study of the temperature (T) and magnetic field (H) dependence of the electronic density of states (DOS) at the Fermi level, as deduced from specific heat and Knight shift measurements in underdoped YBa_{2}Cu_{3}O_{y}…
View article: Spin susceptibility of charge-ordered YBa <sub>2</sub> Cu <sub>3</sub> O <sub> <i>y</i> </sub> across the upper critical field
Spin susceptibility of charge-ordered YBa <sub>2</sub> Cu <sub>3</sub> O <sub> <i>y</i> </sub> across the upper critical field Open
Significance The upper critical field is a fundamental, and technologically important, property that measures the ability of a superconductor to withstand magnetic fields. Recently, there has been a controversy regarding the values H…
View article: Spin susceptibility of charge ordered YBa2Cu3Oy across the upper critical field
Spin susceptibility of charge ordered YBa2Cu3Oy across the upper critical field Open
The value of the upper critical field Hc2, a fundamental characteristic of the superconducting state, has been subject to strong controversy in high-Tc copper-oxides. Since the issue has been tackled almost exclusively by macroscopic techn…
View article: Nuclear magnetic resonance in high magnetic field: Application to condensed matter physics
Nuclear magnetic resonance in high magnetic field: Application to condensed matter physics Open
In this review, we describe the potentialities offered by the nuclear magnetic resonance (NMR) technique to explore at a microscopic level new quantum states of condensed matter induced by high magnetic fields. We focus on experiments real…
View article: Magnetic-Order Crossover in Coupled Spin Ladders
Magnetic-Order Crossover in Coupled Spin Ladders Open
We report a novel crossover behavior in the long-range-ordered phase of a prototypical spin-1/2 Heisenberg antiferromagnetic ladder compound (C_{7}H_{10}N)_{2}CuBr_{4}. The staggered order was previously evidenced from a continuous and sym…
Nuclear Magnetic Resonance Reveals Disordered Level-Crossing Physics in the Bose-Glass Regime of the Br-Doped Compound at a High Magnetic Field Open
View article: Nuclear magnetic resonance study of the magnetic-field-induced ordered phase in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>NiCl</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:mtext>−</mml:mtext><mml:mn>4</mml:mn><mml:mtext>SC</mml:mtext><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mtext>NH</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>compound
Nuclear magnetic resonance study of the magnetic-field-induced ordered phase in thecompound Open
Nuclear magnetic resonance (NMR) study of the high magnetic field (H) part of\nthe Bose-Einstein condensed (BEC) phase of the quasi-onedimensional (quasi-1D)\nantiferromagnetic quantum spin-chain compound NiCl2-4SC(NH2)2 (DTN) was\nperform…
View article: Quasiparticle Scattering off Defects and Possible Bound States in Charge-Ordered <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mi>y</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>
Quasiparticle Scattering off Defects and Possible Bound States in Charge-Ordered Open
We report the NMR observation of a skewed distribution of ^{17}O Knight shifts when a magnetic field quenches superconductivity and induces long-range charge-density-wave (CDW) order in YBa_{2}Cu_{3}O_{y}. This distribution is explained by…
View article: Dichotomy between Attractive and Repulsive Tomonaga-Luttinger Liquids in Spin Ladders
Dichotomy between Attractive and Repulsive Tomonaga-Luttinger Liquids in Spin Ladders Open
We present a direct NMR method to determine whether the interactions in a Tomonaga-Luttinger liquid (TLL) state of a spin-1/2 Heisenberg antiferromagnetic ladder are attractive or repulsive. For the strong-leg spin ladder compound (C_{7}H_…
View article: Persistence of slow fluctuations in the overdoped regime of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Ba</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>Fe</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Rh</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:msub><mml:mrow/><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>superconductors
Persistence of slow fluctuations in the overdoped regime ofsuperconductors Open
We present nuclear magnetic resonance evidence that very slow ($\\leq 1$ MHz)\nspin fluctuations persist into the overdoped regime of\nBa(Fe$_{1-x}$Rh$_{x}$)$_2$As$_2$ superconductors. Measurements of the $^{75}$As\nspin echo decay rate, o…
View article: Persistence of slow fluctuations in the overdoped regime of Ba(Fe<sub>1-x</sub>Rh<sub>x</sub>)<sub>2</sub>As<sub>2</sub> superconductors
Persistence of slow fluctuations in the overdoped regime of Ba(Fe<sub>1-x</sub>Rh<sub>x</sub>)<sub>2</sub>As<sub>2</sub> superconductors Open
We present nuclear magnetic resonance evidence that very slow (1 MHz) spin fluctuations persist into the overdoped regime of Ba(Fe1-xRhx)2As2 superconductors. Measurements of the 75As …
View article: Cu-NMR study of oxygen disorder in ortho-II YBa2Cu3Oy
Cu-NMR study of oxygen disorder in ortho-II YBa2Cu3Oy Open
We show that 63Cu NMR spectra place strong constraints on both the nature and the concentration of oxygen defects in ortho-II YBa2Cu3Oy. Systematic deviation from ideal ortho-II order is revealed by the presence of inequivalent Cu sites in…
View article: Quantum tricritical fluctuations driving mass enhancement and reentrant superconductivity in URhGe
Quantum tricritical fluctuations driving mass enhancement and reentrant superconductivity in URhGe Open
International audience
View article: Giant magnetic field dependence of the coupling between spin chains in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">BaCo</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:math>
Giant magnetic field dependence of the coupling between spin chains in Open
We use nuclear magnetic resonance to map the complete low-temperature phase\ndiagram of the antiferromagnetic Ising-like spin-chain system BaCo2V2O8 as a\nfunction of the magnetic field applied along the chains. In contrast to the\npredict…
View article: Emergence of Orbital Nematicity in the Tetragonal Phase of BaFe$_2$(As$_{1-x}$P$_x$)$_2$
Emergence of Orbital Nematicity in the Tetragonal Phase of BaFe$_2$(As$_{1-x}$P$_x$)$_2$ Open
We report on $^{75}$As-NMR measurements in single crystalline BaFe$_{2}$(As$_{0.96}$P$_{0.04}$)$_{2}$ for magnetic fields parallel to the orthorhombic $[110]_{\rm o}$ and $[100]_{\rm o}$ directions above the structural transition temperatu…
View article: Incipient charge order observed by NMR in the normal state of YBa2Cu3Oy
Incipient charge order observed by NMR in the normal state of YBa2Cu3Oy Open