Publications (26)
Role of anion in the pairing interaction of iron-based superconductivity
J. -X. Yin, Y. Y. Zhao, Zheng Wu +20
High-temperature iron-based superconductivity develops in a structure with unusual lattice-orbital geometry, based on a planar layer of Fe atoms with 3d orbitals and tetrahedrally…
Quasiparticle Interference of the van-Hove singularity in SrRuO
A. Kreisel, C. A. Marques, L. C. Rhodes +7
The single-layered ruthenate SrRuO is one of the most enigmatic unconventional superconductors. While for many years it was thought to be the best candidate for a chiral $p…
Critical Currents in Conventional Josephson Junctions With Grain Boundaries
Miguel Antonio Sulangi, Laetitia Bettmann, T. A. Weingartner +5
It has been hypothesized that the variation of the critical currents in Nb/Al-AlO/Nb junctions is due to, among other effects, the presence of grain boundaries in the system. M…
Interpretation of scanning tunneling quasiparticle interference and impurity states in cuprates
A. Kreisel, Peayush Choubey, T. Berlijn +2
We apply a recently developed method combining first principles based Wannier functions with solutions to the Bogoliubov-de Gennes equations to the problem of interpreting STM data…
Stellar s-process neutron capture cross section of Ce isotopes
R. N. Sahoo, M. Paul, Y. Kashiv +6
Stellar abundances of cerium are of high current interest based both on observations and theoretical models, especially with regard to the neutron--magic Ce isotope. A larg…
The Physics of the B Factories
A. J. Bevan, B. Golob, Th. Mannel +2003
This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and da…
Exclusive Vector Meson Production at HERA
A. Kreisel
An extended study of exclusive vector meson production in e,p interactions has been performed by the H1 and the ZEUS collaborations at the HERA collider. Recent measurements are re…
Spin fluctuations and superconductivity in KxFe{2-y}Se2
A. Kreisel, Y. Wang, T. A. Maier +2
Superconductivity in alkali-intercalated iron selenide, with T_c's of 30K and above, may have a different origin than that of the other Fe-based superconductors, since it appears t…
Stellar ArAr reactions and their effect on light neutron-rich nuclide synthesis
M. Tessler, M. Paul, S. Halfon +22
The ArAr ( = 35 d) and ArAr (269 y) reactions were studied for the first time with a quasi-Maxwellian ( keV) neutron fl…
Impact of Iron-site defects on Superconductivity in LiFeAs
Shun Chi, Ramakrishna Aluru, Udai Raj Singh +10
In conventional s-wave superconductors, only magnetic impurities exhibit impurity bound states, whereas for an s+- order parameter they can occur for both magnetic and non-magnetic…
Brillouin light scattering spectroscopy of parametrically excited dipole-exchange magnons
A. A. Serga, C. W. Sandweg, V. I. Vasyuchka +5
The spectral distribution of parametrically excited dipole-exchange magnons in an in-plane magnetized epitaxial film of yttrium-iron garnet was studied by means of frequency- and w…
Stellar -process neutron capture cross sections of Ga
M. Tessler, M. Paul, S. Halfon +5
The stable gallium isotopes, Ga, are mostly produced by the weak slow () process in massive stars. We report here on measurements of astrophysically-relevant neutron c…
Visualization of atomic-scale phenomena in superconductors: application to FeSe
Peayush Choubey, T. Berlijn, A. Kreisel +2
We propose a simple method of calculating inhomogeneous, atomic-scale phenomena in superconductors which makes use of the wave function information traditionally discarded in the c…
Model of Electronic Structure and Superconductivity in Orbitally Ordered FeSe
Shantanu Mukherjee, A. Kreisel, P. J. Hirschfeld +1
We provide a band structure with low-energy properties consistent with recent photoemission and quantum oscillations measurements on FeSe, assuming mean-field like s and/or d-wave…
Stellar 30-keV neutron capture in 94,96Zr and the 90Zr(gamma,n)89Zr photonuclear reaction with a high-power liquid-lithium target
M. Tessler, M. Paul, A. Arenshtam +16
A high-power Liquid-Lithium Target (LiLiT) was used for the first time for neutron production via the thick-target 7Li(p,n)7Be reaction and quantitative determination of neutron ca…
Disorder-induced topological change of the superconducting gap structure in iron pnictides
Y. Mizukami, M. Konczykowski, Y. Kawamoto +9
In superconductors with unconventional pairing mechanisms, the energy gap in the excitation spectrum often has nodes, which allow quasiparticle excitations at low energies. In many…
Spin excitations in a model of FeSe with orbital ordering
A. Kreisel, Shantanu Mukherjee, P. J. Hirschfeld +1
We present a theoretical study of the dynamical spin susceptibility for the intriguing Fe-based superconductor FeSe, based on a tight-binding model developed to account for the tem…
Stellar s-process neutron capture cross sections on A-Se and A-Ce
R. N. Sahoo, M. Tessler, S. Halfon +6
We report on experiments at the Soreq Applied Research Accelerator Facility - Liquid-Lithium Target (SARAF-LiLiT) laboratory dedicated to the study of s-process neutron capture rea…
Imaging the Real Space Structure of the Spin Fluctuations in an Iron-based superconductor
Shun Chi, Ramakrishna Aluru, Stephanie Grothe +8
Spin fluctuations are a leading candidate for the pairing mechanism in high temperature superconductors, supported by the common appearance of a distinct resonance in the spin susc…
Using controlled disorder to distinguish and gap structure in Fe-based superconductors
Y. Wang, A. Kreisel, P. J. Hirschfeld +1
We reconsider the effect of disorder on the properties of a superconductor characterized by a sign-changing order parameter appropriate for Fe-based materials. Within a simple two…
Magnetic ground state and magnon-phonon interaction in multiferroic h-YMnO
S. L. Holm, A. Kreisel, T. K. Schäffer +14
Inelastic neutron scattering has been used to study the magneto-elastic excitations in the multiferroic manganite hexagonal YMnO. An avoided crossing is found between magnon an…
Wide-range wavevector selectivity of magnon gases in Brillouin light scattering spectroscopy
C. W. Sandweg, M. B. Jungfleisch, V. I. Vasyuchka +6
Brillouin light scattering spectroscopy is a powerful technique for the study of fast magnetization dynamics with both frequency- and wavevector resolution. Here, we report on a di…
Pairing symmetry of the one-band Hubbard model in the paramagnetic weak-coupling limit: a numerical RPA study
A. T. Romer, A. Kreisel, I. Eremin +4
We study the spin-fluctuation-mediated superconducting pairing gap in a weak-coupling approach to the Hubbard model for a two dimensional square lattice in the paramagnetic state.…
Superconducting gap in LiFeAs from three-dimensional spin-fluctuation pairing calculations
Y. Wang, A. Kreisel, V. B. Zabolotnyy +5
The lack of nesting of the electron and hole Fermi-surface sheets in the Fe-based superconductor LiFeAs, with a critical temperature of 18 K, has led to questions as to whether the…
Visualization of local magnetic moments emerging from impurities in the Hund's metal states of FeSe
Sang Yong Song, J. H. J. Martiny, A. Kreisel +2
Understanding the origin of the magnetism of high temperature superconductors is crucial for establishing their unconventional pairing mechanism. Recently, theory predicts that FeS…
Towards a quantitative description of tunneling conductance of superconductors: application to LiFeAs
A. Kreisel, R. Nelson, T. Berlijn +11
Since the discovery of iron-based superconductors, a number of theories have been put forward to explain the qualitative origin of pairing, but there have been few attempts to make…