1k citations · 6k across the 58 of their papers we have counts for
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The cuprate phase diagram and the influence of nanoscale inhomogeneities
Nader Zaki, Hongbo Yang, Jon Rameau +3
The phase diagram associated with the high Tc superconductors is complicated by an array of different ground states. The parent material represents an antiferromagnetic insulator b…
The Superconducting Phases of URu2Si2: Longitudinal Sound Velocity Measurements
B. S. Shivaram, V. W. Ulrich, D. G. Hinks
High resolution longitudinal sound velocity measurements in a magnetic field performed in the temperature tending to zero limit reveal two distinct signatures attributable to multi…
On the Reconstructed Fermi Surface in the Underdoped Cuprates
H. -B. Yang, J. D. Rameau, Z. -H. Pan +5
The Fermi surface topologies of underdoped samples the high-Tc superconductor Bi2212 have been measured with angle resolved photoemission. By examining thermally excited states abo…
Counterintuitive Consequence of Heating in Strongly-Driven Intrinsic-Junctions of BiSrCaCuO Mesas
C. Kurter, L. Ozyuzer, T. Proslier +3
Anomalously high and sharp peaks in the conductance of intrinsic Josephson junctions in BiSrCaCuO (Bi2212) mesas have been universally interpreted as supe…
Observation of a d-wave nodal liquid in highly underdoped Bi_2Sr_2CaCu_2O_{8+δ}
U. Chatterjee, M. Shi, D. Ai +15
We use angle resolved photoemission spectroscopy to probe the electronic excitations of the non-superconducting state that exists between the antiferromagnetic Mott insulator at ze…
Studies of superconductivity and structure for CaC6 to pressures above 15 GPa
M. Debessai, J. J. Hamlin, J. S. Schilling +4
The dependence of the superconducting transition temperature Tc of CaC6 has been determined as a function of hydrostatic pressure in both helium-loaded gas and diamond-anvil cells…
Evolution of the local superconducting density of states in ErRhB close to the ferromagnetic transition
V. Crespo, J. G. Rodrigo, H. Suderow +3
We present local tunneling spectroscopy experiments in the superconducting and ferromagnetic phases of the reentrant superconductor ErRhB. The tunneling conductance curve…
Muon spin rotation study of the magnetic penetration depth in the intercalated graphite superconductor CaC6
D. Di Castro, A. Kanigel, A. Maisuradze +9
We report temperature- and magnetic field-dependent bulk muon spin rotation measurements in a c-axis oriented superconductor CaC6 in the mixed state. Using both a simple second mom…
Intrinsic Impurity in the High Temperature Superconductor Bi_2Sr_2CaCu_2O
Bo Chen, Sutirtha Mukhopadhyay, W. P. Halperin +2
The {}^{17}O NMR spectra of Bi_2Sr_2CaCu_2O (Bi-2212) single crystals were measured in the temperature range from 4 K to 200 K and magnetic fields from 3 to 29 T, reported…
Investigation of the Tunneling Spectra in HgBr2-Intercalated Bi-2212 Single Crystals below and above Tc
C. Kurter, D. Mazur, L. Ozyuzer +2
Interlayer tunneling spectroscopy measurements were performed on mesa arrays of Bi-2212 single crystals, intercalated with HgBr. Tunneling conductances were obtained over a wid…
Two-dimensional Vortices in Superconductors
Bo Chen, W. P. Halperin, Prasenjit Guptasarma +4
Superconductors have two key characteristics. They expel magnetic field and they conduct electrical current with zero resistance. However, both properties are compromised in high m…
Evidence of Strong-Coupled Superconductivity in CaC6 from Tunneling Spectroscopy
C. Kurter, L. Ozyuzer, Daniel Mazur +5
Point-contact tunneling on CaC crystals reproducibly reveals superconducting gaps, , of 2.30.2 meV which are ~40% larger than earlier reports. That puts CaC i…
Large Ca Isotope Effect in CaC6
D. G. Hinks, D. Rosenmann, H. Claus +2
We have measured the Ca isotope effect in the newly discovered superconductor CaC6. The isotope effect coefficient is 0.50(7). If one assumes that this material is a conventional e…
Negative thermal expansion of MgB in the superconducting state and anomalous behavior of the bulk Grüneisen function
J. J. Neumeier, T. Tomita, M. Debessai +4
The thermal expansion coefficient of MgB is revealed to change from positive to negative on cooling through the superconducting transition temperature . The Grüneisen…
Persistence of Strong Electron Coupling to a Narrow Boson Spectrum in Overdoped BiSrCaCuO (Bi2212) Tunneling Data
J. F. Zasadzinski, L. Ozyuzer, L. Coffey +3
A d-wave, Eliashberg analysis of break junction and STM tunneling spectra on BiSrCaCuO (Bi2212) reveals that a spectral dip feature is directly linked to strong electronic coupling…
Thermal Expansion and Compressibility in Superconducting NaxCoO2o4xD2O (x?1/3): Evidence for Pressure-Induced Charge Redistribution
J. D. Jorgensen, M. Avdeev, D. G. Hinks +2
We have performed thermal expansion and compressibility measurements on the recently discovered superconducting material NaxCoO2*4xD2O (x=1/3) using neutron powder diffraction over…
Single Junction and Intrinsic Josephson Junction Tunneling Spectroscopies of Bi2Sr2CaCu2O8+d
L. Ozyuzer, C. Kurter, J. F. Zasadzinski +3
Tunneling spectroscopy measurements are reported on optimally-doped and overdoped BiSrCaCuO single crystals. A novel point contact method is used to obtai…
Crystal Structure of the Sodium Cobaltate Deuterate Superconductor NaxCoO2o4xD2O (x=1/3)
J. D. Jorgensen, M. Avdeev, D. G. Hinks +2
Neutron and x-ray powder diffraction have been used to investigate the crystal structures of a sample of the newly-discovered superconducting sodium cobaltate deuterate compound wi…
Retention of Two-Band Superconductivity in Highly Carbon-Doped MgB2
H. Schmidt, K. E. Gray, D. G. Hinks +4
Tunneling data on MgB_{1.8}C_{0.2} show a reduction in the energy gap of the pi-bands by a factor of two from undoped MgB2 that is consistent with the Tc reduction, but inconsisten…
Probing the Phase Diagram of Bi2Sr2CaCu2O8+d with Tunneling Spectroscopy
L. Ozyuzer, J. F. Zasadzinski, K. E. Gray +2
Tunneling measurements are performed on Ca-rich single crystals of Bi2Sr2CaCu2O8+d (Bi2212), with various oxygen doping levels, using a novel point contact method. At 4.2 K, SIN an…
Dependence of the superconducting transition temperature of single- and polycrystalline MgB2 on hydrostatic pressure
S. Deemyad, T. Tomita, J. J. Hamlin +6
The dependence of Tc for MgB2 on purely hydrostatic or nearly hydrostatic pressure has been determined to 23 GPa for single-crystalline and to 32 GPa for polycrystalline samples, a…
Break-Junction Tunneling on MgB_2
H. Schmidt, J. F. Zasadzinski, K. E. Gray +1
Tunneling data on magnesium diboride, MgB_2, are reviewed with a particular focus on superconductor-insulator-superconductor (SIS) junctions formed by a break-junction method. The…
Synthesis and Stoichiometry of MgB2
D. G. Hinks, J. D. Jorgensen, Hong Zheng +1
The system MgxB2 has been investigated to investigate possible nonstoichiometry in MgB2. When synthesized at 850oC, MgB2 is a line compound with a possible Mg vacancy content of ab…
Large Anisotropic Thermal Expansion Anomaly near the Superconducting Transition Temperature in MgB2
J. D. Jorgensen, D. G. Hinks, P. G. Radaelli +2
An anisotropic lattice anomaly near the superconducting transition temperature, Tc, was observed in MgB2 by high-resolution neutron powder diffraction. The a-axis thermal expansion…