88 citations · 461 across the 15 of their papers we have counts for
16 papers
Revealing the Origin of Time-reversal Symmetry Breaking in Fe-chalcogenide Superconductor FeTe1-xSex
Camron Farhang, Nader Zaki, Jingyuan Wang +3
Recently evidence has emerged in the topological superconductor Fe-chalcogenide FeTe1-xSex for time-reversal symmetry breaking (TRSB), the nature of which has strong implications o…
On the Role of Defects in the Electronic Structure of MnBiSbTe
Daniel Nevola, Kevin F. Garrity, Nader Zaki +4
Elemental substitution is a proven method of Fermi level tuning in topological insulators, which is needed for device applications. Through static and time resolved photoemission,…
Ultrafast Melting of Superconductivity in an Iron-Based Superconductor
Dan Nevola, Nader Zaki, John M. Tranquada +4
Intense debate has recently arisen regarding the photoinduced changes to the iron-chalcogenide superconductors, including the enhancement of superconductivity and a metastable stat…
Magnetic, superconducting, and topological surface states on FeTeSe
Yangmu Li, Nader Zaki, Vasile O. Garlea +9
The idea of employing non-Abelian statistics for error-free quantum computing ignited interest in recent reports of topological surface superconductivity and Majorana zero modes (M…
Optical and photoemission investigation of structural and magnetic transitions in the iron-based superconductor SrNaFeAs
R. Yang, J. W. Huang, N. Zaki +8
We report the temperature-dependent optical conductivity and ARPES studies of the iron-based superconductor (SC) SrNaFeAs in the high-temperature tetragon…
Time Reversal Symmetry Breaking in the Fe-Chalcogenide Superconductors
N. Zaki, G. Gu, A. M. Tsvelik +2
Topological superconductivity has been sought for in a variety of heterostructure systems, the interest being that a material displaying such a phenomenon could prove to be the ide…
On the interplay of paramagnetism and topology in the Fe-based High Tc Superconductors
J. D. Rameau, N. Zaki, G. D. Gu +2
The high Tc superconductor FeTe0.55Se0.45 has recently been shown to support a surface state with topological character. Here we use low-energy laser-based ARPES with variable ligh…
Temperature-Driven Topological Transition in 1T'-MoTe2
Ayelet Notis Berger, Erick Andrade, Alex Kerelsky +12
The topology of Weyl semimetals requires the existence of unique surface states. Surface states have been visualized in spectroscopy measurements, but their connection to the topol…
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…
Tuning the Electronic Structure of Monolayer Graphene/MoS2 van der Waals Heterostructures via Interlayer Twist
Wencan Jin, Po-Chun Yeh, Nader Zaki +9
We directly measure the electronic structure of twisted graphene/MoS2 van der Waals heterostructures, in which both graphene and MoS2 are monolayers. We use cathode lens microscopy…
Quasiparticle Interference, quasiparticle interactions and the origin of the charge density-wave in 2H-NbSe
C. J. Arguello, E. P. Rosenthal, E. F. Andrade +10
We show that a small number of intentionally introduced defects can be used as a spectroscopic tool to amplify quasiparticle interference in 2H-NbSe, that we measure by scann…
The Nature of Surface States on Vicinal Cu (775): An STM and Photoemission Study
Nader Zaki, Kevin Knox, Richard M. Osgood +4
We report ARPES and a set of in situ STM measurements on a narrow-terrace-width vicinal Cu(111) crystal surface, Cu(775), whose vicinal cut lies close to the transition between ter…
Atom-Wide Co Wires on Cu(775) at Room Temperature
Nader Zaki, Denis Potapenko, Peter D. Johnson +1
We report on a new surface phase of the Co-vicinal-Cu(111) system which exhibits self-assembled uniform Co quantum wires that are stable at 300K. STM-imaging measurements show that…
The failure of DFT-based computations for a stepped-substrate-supported correlated Co wire
Nader Zaki, Hyowon Park, Richard M. Osgood +2
Density functional theory (DFT) has been immensely successful in its ability to predict physical properties, and, in particular, structures of condensed matter systems. Here, howev…
Spin-exchange-induced dimerization of an atomic 1-D system
Nader Zaki, Chris A. Marianetti, Danda P. Acharya +6
Using low-temperature scanning tunneling microscopy, we demonstrate an unambiguous 1-D system that surprisingly undergoes a CDW instability on a metallic substrate. Our ability to…
Trapping Surface Electrons on Graphene Layers and Islands
D. Niesner, Th. Fauster, J. I. Dadap +7
We report the use of time- and angle-resolved two-photon photoemission to map the bound, unoccupied electronic structure of the weakly coupled graphene/Ir(111) system. The energy,…