597 citations · 2.6k across the 47 of their papers we have counts for
29 papers · 1 filter
Effect of iron vacancies on the magnetic order and spin dynamics of the spin ladder BaFeSSe
Zengjia Liu, Xiao-Sheng Ni, Lisi Li +11
Quasi-one-dimensional iron chalcogenides possess various magnetic states depending on the lattice distortion, electronic correlations, and presence of defects. We present neutron d…
Non-Thermal Emergence of an Orbital-Selective Mott Phase in FeTeSe
Jianwei Huang, Rong Yu, Zhijun Xu +15
Electronic correlation is of fundamental importance to high temperature superconductivity. Iron-based superconductors are believed to possess moderate correlation strength, which c…
Modeling Tunneling for the Unconventional Superconducting Proximity Effect
Parisa Zareapour, Jianwei Xu, Shu Yang F. Zhao +5
Recently there has been reinvigorated interest in the superconducting proximity effect, driven by predictions of the emergence of Majorana fermions. To help guide this search, we h…
Thermal evolution of antiferromagnetic correlations and tetrahedral bond angles in superconducting FeTeSe
Zhijun Xu, J. A. Schneeloch, Jinsheng Wen +9
It has recently been demonstrated that dynamical magnetic correlations measured by neutron scattering in iron chalcogenides can be described with models of short-range correlations…
Coordination of the energy and temperature scales of pairing across the doping phase diagram of BiSrCaCuO
T. J. Reber, S. Parham, N. C. Plumb +15
Using a new variant of photoelectron spectroscopy, we measure the homogeneous near-nodal pairing () and pair-breaking self-energy () processes for a wide range of doping le…
Pairing, pair-breaking, and their roles in setting the Tc of cuprate high temperature superconductors
T. J. Reber, S. Parham, N. C. Plumb +13
The key ingredients in any superconductor are the Cooper pairs, in which two electrons combine to form a composite boson. In all conventional superconductors the pairing strength a…
Substitution of Ni for Fe in superconducting FeTeSe depresses the normal-state conductivity but not the magnetic spectral weight
Jinghui Wang, Ruidan Zhong, Shichao Li +12
We have performed systematic resistivity and inelastic neutron scattering measurements on FeNiTeSe samples to study the impact of Ni substitution on…
Evidence for a New Excitation at the Interface Between a High-Tc Superconductor and a Topological Insulator
Parisa Zareapour, Alex Hayat, Shu Yang F. Zhao +10
High-temperature superconductors exhibit a wide variety of novel excitations. If contacted with a topological insulator, the lifting of spin rotation symmetry in the surface states…
Low-energy phonons and superconductivity in SnInTe
Zhijun Xu, J. A. Schneeloch, Ruidan Zhong +6
We present neutron scattering measurements on low-energy phonons from a superconducting (~K) SnInTe single crystal sample. The longitudinal acoustic ph…
The Origin and Non-quasiparticle Nature of Fermi Arcs in BiSrCaCuO
T. J. Reber, N. C. Plumb, Z. Sun +12
A Fermi arc is a disconnected segment of a Fermi surface observed in the pseudogap phase of cuprate superconductors. This simple description belies the fundamental inconsistency in…
Low energy magnetic excitations from the Fe(Ni/Cu)TeSe system
Zhijun Xu, Jinsheng Wen, J. Schneeloch +5
We report neutron scattering measurements on low energy (~meV) magnetic excitations from a series of Fe(Ni/Cu)TeSe samples which belong…
Ubiquitous Interplay between Charge Ordering and High-Temperature Superconductivity in Cuprates
Eduardo H. da Silva Neto, Pegor Aynajian, Alex Frano +11
Besides superconductivity, copper-oxide high temperature superconductors are susceptible to other types of ordering. We use scanning tunneling microscopy and resonant elastic x-ray…
Enhanced low-energy magnetic excitations via suppression of the itinerancy in Fe0.98-zCuzTe0.5Se0.5
Jinsheng Wen, Shichao Li, Zhijun Xu +12
We have performed resistivity and inelastic neutron scattering measurements on three samples of Fe0.98-zCuzTe0.5Se0.5 with z = 0, 0.02, and 0.1. It is found that with increasing Cu…
Fully gapped topological surface states in BiSe films induced by a d-wave high-temperature superconductor
Eryin Wang, Hao Ding, Alexei V. Fedorov +17
Topological insulators are a new class of materials, that exhibit robust gapless surface states protected by time-reversal symmetry. The interplay between such symmetry-protected t…
Neutron Scattering Evidence for a Periodically-Modulated Superconducting Phase in the Underdoped Cuprate LaBaCuO
Zhijun Xu, C. Stock, Songxue Chi +4
The role of antiferromagnetic spin correlations in high-temperature superconductors remains a matter of debate. We present inelastic neutron scattering evidence that gapless spin f…
Absolute cross-section normalization of magnetic neutron scattering data
Guangyong Xu, Zhijun Xu, J. M. Tranquada
We discuss various methods to obtain the resolution volume for neutron scattering experiments, in order to perform absolute normalization on inelastic magnetic neutron scattering d…
Collapse of the Fermi surface and fingerprints of order in the pseudogap state of cuprate superconductors
Takeshi Kondo, Ari Palczewski, Yoichiro Hamaya +6
The Fermi surface in the state of cuprates is highly unusual because it appears to consist of disconnected segments called arcs. Their very existence challenges the traditional con…
Temperature-dependent transformation of the magnetic excitation spectrum on approaching superconductivity in Fe1-x (Ni/Cu)x Te0.5 Se0.5
Zhijun Xu, Jinsheng Wen, Yang Zhao +8
Spin excitations are one of the top candidates for mediating electron pairing in unconventional superconductors. Their coupling to superconductivity is evident in a large number of…
Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy
H. Gretarsson, A. Lupascu, Jungho Kim +18
We report Fe K beta x-ray emission spectroscopy study of local magnetic moments in various iron based superconductors in their paramagnetic phases. Local magnetic moments are found…
STM imaging of symmetry-breaking structural distortion in the Bi-based cuprate superconductors
Ilija Zeljkovic, Elizabeth J. Main, Tess L. Williams +14
A complicating factor in unraveling the theory of high-temperature (high-Tc) superconductivity is the presence of a "pseudogap" in the density of states, whose origin has been deba…
Evidence for local moment magnetism in superconducting FeTe0.35Se0.65
Zhijun Xu, Jinsheng Wen, Guangyong Xu +4
The nature of the magnetic correlations in Fe-based superconductors remains a matter of controversy. To address this issue, we use inelastic neutron scattering to characterize the…
Phase Separation and Chemical Inhomogeneity in the Iron Chalcogenide Superconductor Fe1+yTexSe1-x
Hefei Hu, J. M. Zuo, J. S. Wen +6
We report investigation on Fe1+yTexSe1-x single crystals by using scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS). Both nonsuperconduc…
Uniaxial linear resistivity of superconducting La(1.905)Ba(0.095)CuO(4) induced by an external magnetic field
Jinsheng Wen, Qing Jie, Qiang Li +9
We present an experimental study of the anisotropic resistivity of superconducting La(2-x)Ba(x)CuO(4) with x=0.095 and transition temperature Tc=32 K. In a magnetic field perpendic…
Optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45
Christopher C. Homes, Ana Akrap, Jinsheng Wen +4
The complex optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45 with Tc=14K have been examined over a wide frequency range for light polarized in the Fe-Te(Se…