93 citations · 369 across the 23 of their papers we have counts for
23 papers
Observation of a pronounced Hebel-Slichter peak in the spin-lattice relaxation rate and implications for gap and pairing symmetry in LaNiGa
P. Sherpa, R. Hingorani, A. Menon +11
We report a pronounced Hebel-Slichter coherence peak in the zero field nuclear quadrupolar resonance (NQR) spin-lattice relaxation rate of the topological crystalline superconducto…
Strain-induced structural change and nearly-commensurate diffuse scattering in the model high-temperature superconductor HgBaCuO
Mai Ye, Wenshan Hong, Tom Lacmann +9
We investigate the strain response of underdoped HgBaCuO (Hg1201), by synchrotron X-ray diffraction and corresponding simulations of thermal diffuse scattering. The com…
Orbital Ordering in the Charge Density Wave Phases of BaNi(AsP)
Tom Lacmann, Robert Eder, Igor Vinograd +8
We use resonant X-ray scattering at the nickel L edges to investigate the interplay between orbital degrees of freedom and charge density waves (CDW) in the superconductor…
Robust Charge-Density Wave Correlations in Optimally-Doped YBa2Cu3Oy
Rui Zhou, Igor Vinograd, Hadrien Mayffre +7
Charge-density wave (CDW) order is a key property of high-Tc cuprates, but its boundaries in the phase diagram and potential connections to other phases remain controversial. We re…
Anomalous phonon Grüneisen parameters in semiconductor TaNiS
Mai Ye, Tom Lacmann, Mehdi Frachet +7
Strain tuning is a powerful experimental method in probing correlated electron systems. Here we study the strain response of the lattice dynamics and electronic structure in semico…
Nuclear magnetic resonance studies in a model transverse field Ising system
Y-H. Nian, I. Vinograd, C. Chaffey +6
The suppression of ferroquadrupolar order in TmVO in a magnetic field is well-described by the transverse field Ising model, enabling detailed studies of critical dynamics near…
Signatures of two gaps in the spin susceptibility of a cuprate superconductor
R. Zhou, I. Vinograd, M. Hirata +10
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…
Absence of strong magnetic fluctuations or interactions in the normal state of LaNiGa
P. Sherpa, I. Vinograd, Y. Shi +15
We present nuclear magnetic (NMR) and qudrupole (NQR) resonance and magnetization data in the normal state of the topological crystalline superconductor LaNiGa. We find no evid…
Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBaCuO
Igor Vinograd, Sofia Michaela Souliou, Amir-Abbas Haghighirad +14
Uniaxial pressure provides an efficient approach to control the competition between charge density waves (CDWs) and superconductivity in underdoped YBaCuO. I…
Spin-echo and quantum versus classical critical fluctuations in TmVO
Y-H. Nian, I. Vinograd, T. Green +6
Using spin-echo Nuclear Magnetic Resonance in the model Transverse-Field Ising system TmVO, we show that low frequency quantum fluctuations at the quantum critical point have a…
Competition between spin ordering and superconductivity near the pseudogap boundary in La2-xSrxCuO4: insights from NMR
I. Vinograd, R. Zhou, H. Mayaffre +11
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…
Second order Zeeman interaction and ferroquadrupolar order in TmVO
I. Vinograd, K. R. Shirer, P. Massat +7
TmVO exhibits ferroquadrupolar order of the Tm 4f electronic orbitals at low temperatures, and is a model system for Ising nematicity that can be tuned continuously to a quan…
Inverse Laplace Transformation Analysis of Stretched Exponential Relaxation
H. Choi, I. Vinograd, C. Chaffey +1
We investigate the effectiveness of the Inverse Laplace Transform (ILT) analysis method to extract the distribution of relaxation rates from nuclear magnetic resonance data with st…
Anisotropic nematic fluctuations above the ferroquadrupolar transition in TmVO
Z. Wang, I. Vinograd, Z. Mei +5
TmVO exhibits ferroquadrupolar order below 2.15 K with a well-isolated non-Kramers ground state doublet, and is a model system to understand Ising nematic order. We present $^{…
Locally commensurate charge-density wave with three-unit-cell periodicity in YBCO
I. Vinograd, R. Zhou, M. Hirata +7
In order to identify the mechanism responsible for the formation of charge-density waves (CDW) in cuprate superconductors, it is important to understand which aspects of the CDW's…
Inhomogeneous Knight shift in vortex cores of superconducting FeSe
I. Vinograd, S. P. Edwards, Z. Wang +5
We report Se NMR data in the normal and superconducting states of a single crystal of FeSe for several different field orientations. The Knight shift is suppressed in the su…
High magnetic field ultrasound study of spin freezing in LaSrCuO
M. Frachet, S. Benhabib, I. Vinograd +11
High- cuprate superconductors host spin, charge and lattice instabilities. In particular, in the antiferromagnetic glass phase, over a large doping range, lanthanum bas…
Hyperfine Couplings as a Probe of Orbital Anisotropy in Heavy Fermion Materials
P. Menegasso, J. C. Souza, I. Vinograd +5
The transferred hyperfine interaction between nuclear and electron spins in an heavy fermion material depends on the hybridization between the -electron orbitals and those surro…
Hidden magnetism at the pseudogap critical point of a high temperature superconductor
Mehdi Frachet, Igor Vinograd, Rui Zhou +17
The mysterious pseudogap phase of cuprate superconductors ends at a critical hole doping level p* but the nature of the ground state below p* is still debated. Here, we show that t…
NMR study of charge density waves under hydrostatic pressure in YBa2Cu3Oy
I. Vinograd, R. Zhou, H. Mayaffre +5
The effect of hydrostatic pressure (P) on charge density waves (CDW) in YBa2Cu3Oy has recently been controversial. Using NMR, we find that both the short-range CDW in the normal st…
Spin susceptibility of charge ordered YBa2Cu3Oy across the upper critical field
R. Zhou, M. Hirata, T. Wu +9
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 iss…
Observation of electronic bound states in charge-ordered YBaCuO
R. Zhou, M. Hirata, T. Wu +11
Observing how electronic states in solids react to a local symmetry breaking provides insight into their microscopic nature. A striking example is the formation of bound states whe…
Cu-NMR study of oxygen disorder in ortho-II YBa2Cu3Oy
T. Wu, R. Zhou, M. Hirata +12
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 or…