195 citations · 705 across the 21 of their papers we have counts for
21 papers
Dissipation and diffusion in one-dimensional solids
Harshitra Mahalingam, Ben Andrew Olsen, Aleksandr Rodin
Using a nonperturbative classical model for ionic motion through one-dimensional (1D) solids, we explore how thermal lattice vibrations affect ionic transport properties. Based on…
Atomically-precise Vacancy-assembled Quantum Antidots
Hanyan Fang, Harshitra Mahalingam, Xinzhe Li +16
Patterning antidots ("voids") into well-defined antidot lattices creates an intriguing class of artificial structures for the periodic modulation of 2D electron systems, leading to…
Minimal model of drag in one-dimensional crystals
Harshitra Mahalingam, Zhun Wai Yap, Ben A. Olsen +1
Using a non-perturbative classical approach, we study the dynamics of a mobile particle interacting with an infinite one-dimensional (1D) chain of harmonic oscillators. This minima…
Numerical package for QFT calculations of defect-induced phenomena in graphene
Hillol Biswas, Harshitra Mahalingam, Aleksandr Rodin
We introduce a computationally efficient method based on the path integral formalism to describe defect-modified graphene. By taking into account the entire Brillouin zone, our app…
Gate-tunable artificial nucleus in graphene
Mykola Telychko, Keian Noori, Hillol Biswas +12
We report an atomically-precise integration of individual nitrogen (N) dopant as an in-plane artificial nucleus in a graphene device by atomic implantation to probe its gate-tunabl…
Microscopic theory of ionic motion in solid electrolytes
Aleksandr Rodin, Keian Noori, Alexandra Carvalho +1
We propose a microscopic, first-principles description of the ionic conduction in crystals. This formalism allows us to gain new insights into the ideal characteristics of general…
Microscopic theory of ionic motion in solids
Aleksandr Rodin, Keian Noori, Alexandra Carvalho +1
Drag and diffusion of mobile ions in solids are of interest for both purely theoretical and applied scientific communities. This article proposes a theoretical description of ion d…
Collective Excitations in 2D Materials
Aleksandr Rodin, Maxim Trushin, Alexandra Carvalho +1
Research on 2D materials has been one of the fastest-growing fields in condensed matter physics and materials science in the past 10 years. The low dimensionality and strong correl…
Phonon Casimir effect in polyatomic systems
Gideon Lee, Aleksandr Rodin
The phonon Casimir effect describes the phonon-mediated interaction between defects in condensed-matter systems. Using the path-integral formalism, we derive a general method for c…
Hydrogen adatoms on graphene: the role of hybridization and lattice distortion
Keian Noori, Su Ying Quek, Aleksandr Rodin
Hydrogen adatoms on graphene are investigated using DFT and analytical approaches. We demonstrate that the level of lattice deformation due to the hydrogen adsorption does not subs…
Graphene-mediated interaction between adsorbed impurities
Keian Noori, Hillol Biswas, Su Ying Quek +1
Interaction between adsorbed atoms in graphene is studied using a combination of DFT and the path integral formalism. Our results reveal a complex non-monotonic interaction profile…
Many-impurity phonon Casimir effect in atomic chains
Aleksandr Rodin
Phonon Casimir effect is the long-range interaction between impurities in condensed matter systems, mediated by vacuum fluctuations of the phonon field. For pairs of impurities, th…
Bulk-mediated interaction between impurities in 1D atomic chains
Aleksandr Rodin, Keian Noori, Su Ying Quek
A combination of numerical and analytical methods is employed to study a one-dimensional chain of identical atoms with adsorbates. We show that the electron-mediated interaction en…
Strain-induced gauge and Rashba fields in ferroelectric Rashba lead chalcogenide PbX monolayers (X = S, Se, Te)
Paul Z. Hanakata, A. S. Rodin, Harold S. Park +2
One of the exciting features of two-dimensional (2D) materials is their electronic and optical tunability through strain engineering. Previously, we found a class of 2D ferroelectr…
Localized Magnetic States in 2D Semiconductors
Aleksandr Rodin, Antonio Helio Castro Neto
We study the formation of magnetic states in localized impurities embedded into two-dimensional semiconductors. By considering various energy configurations, we illustrate the inte…
Spin-Orbit Dirac Fermions in 2D Systems
Aleksandr S. Rodin, Paul Z. Hanakata, Alexandra Carvalho +3
We propose a novel model for including spin-orbit interactions in buckled two dimensional systems. Our results show that in such systems, intrinsic spin-orbit coupling leads to a f…
Strongly bound Mott-Wannier Excitons in GeS and GeSe monolayers
Lidia C. Gomes, P. E. Trevisanutto, A. Carvalho +2
The excitonic spectra of single layer GeS and GeSe are predicted by ab initio GW-Bethe Salpeter equation calculations. G 0 W 0 calculations for the band structures find a fundament…
Collective modes in anisotropic double layer systems
A. S. Rodin, A. H. Castro Neto
We study collective modes in anisotropic double layer systems. To this end, we derive a zero- dynamic polarization function for a conductor with a paraboloidal dispersion. Follo…
Exciton binding energies and luminescence of phosphorene under pressure
L. Seixas, A. S. Rodin, A. Carvalho +1
The optical response of phosphorene can be gradually changed by application of moderate uniaxial compression, as the material undergoes the transition into an indirect gap semicond…
Phosphorene nanoribbons
A. Carvalho, A. S. Rodin, A. H. Castro Neto
Edge-induced gap states in finite phosphorene layers are examined using analytical models and density functional theory. The nature of such gap states depends on the direction of t…
Ultrafast and Nanoscale Plasmonic Phenomena in Exfoliated Graphene Revealed by Infrared Pump-Probe Nanoscopy
Martin Wagner, Zhe Fei, Alexander S. McLeod +14
Pump-probe spectroscopy is central for exploring ultrafast dynamics of fundamental excitations, collective modes and energy transfer processes. Typically carried out using conventi…