52 citations · 259 across the 19 of their papers we have counts for
19 papers
Imaging of van der Waals Materials via Standing-Wave Photoemission Microscopy: Depth-Resolved Electronic Structure of WS2
J. R. Paudel, R. Muzzio, M. E. Matzelle +13
Two-dimensional van der Waals materials promise electronic, optoelectronic, and quantum technologies, yet depth-resolved characterization remains challenging. Here, we demonstrate…
Green's Function Methods for Computing Supercurrents in Josephson Junctions
Eduardo R. Mucciolo, Jouko Nieminen, Xiao Xiao +3
Interest in Josephson junctions (JJs) has increased rapidly in recent years not only because of their use in qubits and other quantum devices but also due to the unique physics sup…
Giant Kohn anomaly and chiral phonons in the charge density wave phase of 1H-NbSe
Susy Exists, Sougata Mardanya, Robert Markiewicz +6
Despite extensive investigations, many aspects of charge density waves (CDWs) remain elusive, especially the relative roles of electron-phonon coupling and Fermi surface nesting as…
Atomistic modeling of a superconductor-transition-metal dichalcogenide-superconductor Josephson junction
Jouko Nieminen, Sayandip Dhara, Wei-Chi Chiu +2
Using an atomistic tight-binding model, we study the characteristics of a Josephson junction formed by monolayers of MoS sandwiched between Pb superconducting electrodes. We de…
Strain-Induced Charge Density Waves with Emergent Topological States in Monolayer NbSe2
Wei-Chi Chiu, Sougata Mardanya, Robert Markiewicz +7
Emergence of topological states in strongly correlated systems, particularly two-dimensional (2D) transition-metal dichalcogenides, offers a platform for manipulating electronic pr…
Spectroscopic signatures of different symmetries of the superconducting order parameter in metal-decorated graphene
Timo Saari, Jouko Nieminen, Arun Bansil
Motivated by the recent experiments indicating superconductivity in metal-decorated graphene sheets, we investigate their quasi-particle structure within the framework of an effect…
Nanoscale interplay of strain and doping in a high-temperature superconductor
Ilija Zeljkovic, Jouko Nieminen, Dennis Huang +10
The highest temperature superconductors are electronically inhomogeneous at the nanoscale, suggesting the existence of a local variable which could be harnessed to enhance the supe…
Evidence of strong correlations at the van Hove singularity in the scanning tunneling spectra of superconducting Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals
Jouko Nieminen, Ilpo Suominen, Tanmoy Das +2
We present realistic multiband calculations of scanning tunneling spectra in Bi_{2}Sr_{2}CaCu_{2} O_{8+δ} over a wide doping range. Our modeling incorporates effects of a competing…
Spectral decomposition and matrix element effects in scanning tunneling spectroscopy of BiSrCaCuO
Jouko Nieminen, Ilpo Suominen, R. S. Markiewicz +2
We present a Green's function based framework for modeling the scanning tunneling spectrum from the normal as well as the superconducting state of complex materials where the natur…
Effect of orbital symmetry of the tip on Scanning Tunneling Spectra of BiSrCaCuO
Ilpo Suominen, Jouko Nieminen, R. S. Markiewicz +1
We discuss how variations in the scanning tunneling microscope (STM) tip, whether unintentional or intentional, can lead to changes in topographic images and dI/dV spectra. We cons…
Induced superconductivity in noncuprate layers of the BiSrCaCuO high-temperature superconductor: Modeling of scanning tunneling spectra
Ilpo Suominen, Jouko Nieminen, R. S. Markiewicz +1
We analyze how the coherence peaks observed in Scanning Tunneling Spectroscopy (STS) of cuprate high temperature superconductors are transferred from the cuprate layer to the oxide…
Origin of the high-energy kink or the waterfall effect in the photoemission spectrum of the high-temperature superconductor
Susmita Basak, Tanmoy Das, Hsin Lin +4
The high-energy kink or the waterfall effect seen in the photoemission spectra of the cuprates is suggestive of the coupling of the quasiparticles to a high energy bosonic mode wit…
STM Simulation of Molecules on Ultrathin Insulating Overlayers Using Tight-Binding: Au-Pentacene on NaCl bilayer on Cu
Antti Korventausta, Sami Paavilainen, Eeva Niemi +1
We present a fast and efficient tight-binding (TB) method for simulating scanning tunneling microscopy (STM) imaging of adsorbate molecules on ultrathin insulating films. Due to th…
Origin of electron-hole asymmetry in the scanning tunneling spectrum of
Jouko Nieminen, Hsin Lin, R. S. Markiewicz +1
We have developed a material specific theoretical framework for modelling scanning tunneling spectroscopy (STS) of high temperature superconducting materials in the normal as well…
Dynamics of Spreading of Chainlike Molecules with Asymmetric Surface Interactions
M. Haataja, J. A. Nieminen, T. Ala-Nissila
In this work we study the spreading dynamics of tiny liquid droplets on solid surfaces in the case where the ends of the molecules feel different interactions with respect to the s…
Atomic exchange mean field study of intermixing of Au on Ag(110)
J. A. Nieminen
A mean field method to study heteroepitaxial thin film growth is applied to growth, intermixing and surface reconstructions of on . The results are in accordance with…
Molecular ordering of precursor films during spreading of tiny liquid droplets
M. Haataja, J. A. Nieminen, T. Ala-Nissila
In this work we address a novel feature of spreading dynamics of tiny liquid droplets on solid surfaces, namely the case where the ends of the molecules feel different interactions…
Temperature dependence of surface reconstructions of Au on Pd(110)
J. A. Nieminen
Surface reconstructions of Au film on Pd(110) substrate are studied using a local Einstein approximation to quasiharmonic theory with the Sutton-Chen interatomic potential. Tempera…
Dynamics of Spreading of Small Droplets of Chainlike Molecules on Surfaces
J. A. Nieminen, T. Ala- Nissila
Dynamics of spreading of small droplets on surfaces has been studied by the molecular dynamics method. Simulations have been performed for mixtures of solvent and dimer, and solven…