210 citations · 303 across the 19 of their papers we have counts for
19 papers
Controllable and Non-Dissipative Inertial Dynamics of Skyrmion in a Bosonic Platform
Imam Makhfudz
It has been understood in the past a decade or two that the dynamics of spin or magnetization in ultrafast regime necessarily involves inertial term that reflects the reluctance to…
Interplay of Electron Trapping by Defect Midgap State and Quantum Confinement to Optimize Hot Carrier Effect in a Nanowire Structure
Imam Makhfudz, Hamidreza Esmaielpour, Yaser Hajati +2
Hot carrier effect, a phenomenon where charge carriers generated by photon absorption remain energetic by not losing much energy, has been one of the leading strategies in increasi…
Quantum Anomalous Hall Effect in -Electron Kagome Systems: Chern Insulating States from Transverse Spin-Orbit Coupling
Imam Makhfudz, Mikhail Cherkasskii, Mohammad Alipourzadeh +5
The possibility of quantum anomalous Hall effect (QAHE) in two-dimensional kagome systems with -orbital electrons is studied within a multi-orbital tight-binding model. We conce…
Coexistence of symmetry-protected topological order and Neel order in the spin-1/2 ladder antiferromagnet C9H18N2CuBr4
Tao Hong, Imam Makhfudz, Xianglin Ke +7
Topological phases of matter are beyond the paradigm of Landau's symmetry breaking and have challenged our understanding of condensed matter systems. Here we report a new type of s…
Coherent Phonons-Driven Hot Carrier Effect in a Superlattice Solar Cell
Imam Makhfudz, Nicolas Cavassilas, Yaser Hajati +2
Carrier thermalization in a superlattice solar cell made of polar semiconductors is studied theoretically by considering a minimal model where electron-phonon scattering is the pri…
Enhancement of Hot Carrier Effects and Signatures of Confinement in Terms of Thermalization Power in Quantum Well Solar Cells
Imam Makhfudz, Nicolas Cavassilas, Maxime Giteau +4
A theoretical model using electron-phonon scattering rate equations is developed for assessing carrier thermalization under steady-state conditions in two-dimensional systems. The…
Nutation Wave as a Platform for Ultrafast Spin Dynamics in Ferromagnets
Imam Makhfudz, Enrick Olive, Stam Nicolis
At short time scales the inertia term becomes relevant for the magnetization dynamics of ferromagnets and leads to nutation for the magnetization vector. For the case of spatially…
Quantum Spin Superfluid from Bose-Einstein Condensation of Spinons in Pyrochlore Spin Ice
Imam Makhfudz
Quantum spin ice in pyrochlore lattice exemplifies three dimensional frustrated spin systems.In existing studies, Bose-Einstein condensation of bosonic spinons gives rise to magnet…
Effective Field Theory of Chiral Spin Liquid between Ordered Phases in Kagomé Antiferromagnet
Imam Makhfudz
We propose in this work an effective field theory description of the chiral spin liquid state in Heisenberg spin system on kagomé lattice.To this end, we derive the low-energy effe…
On Anderson Localization and Chiral Anomaly in Disordered Time-Reversal Invariant Weyl Semimetals: Nonperturbative and Berry Phase Effects
Imam Makhfudz
Weyl semimetal, a three-dimensional electronic system with relativistic linear energy dispersion around gapless points carrying nontrivial Berry charge, is predicted to exhibit a w…
Majorana Zero Modes in Superconducting Proximity-coupled Magnetic Domain Wall
Babak Zare Rameshti, Yaser Hajati, Imam Makhfudz
We propose a simple model consisting of a magnetic domain wall proximity-coupled to an -wave superconductor for realization of Majorana zero-energy modes. A spin-dependent gauge…
Signatures of Topological Phase Transition in 3d Topological Insulators from Dynamical Axion Response
Imam Makhfudz
Axion electrodynamics, first proposed in the context of particle physics, manifests itself in condensed matter physics in the topological field theory description of 3d topological…
Protection against Spin Gap in 2-d Insulating Antiferromagnets with a Chern-Simons Term
Imam Makhfudz, Pierre Pujol
We propose a novel mechanism for the protection against spin gapped states in doped antiferromagnets. It requires the presence of a Chern-Simons term that can be generated by a cou…
Hole Properties On and Off Magnetization Plateaus in 2-d Antiferromagnets
Imam Makhfudz, Pierre Pujol
The phenomenon of magnetization plateaus in antiferromagnets under magnetic field has always been an important topic in magnetism. We propose to probe the elusive physics of platea…
-Density Wave (DDW) Scenario Description of the New Hidden Charge Order in Cuprates
Imam Makhfudz
In this paper, we show that the theory of high superconductivity based on a microscopic model with -density wave (DDW) scenario in the pseudogap phase is able to reproduce…
Fluctuation-induced First Order Quantum Phase Transition of U(1) Quantum Spin Liquid in Pyrochlore Quantum Antiferromagnet
Imam Makhfudz
We show using quantum free energy calculation that the quantum phase transition between U(1) quantum spin liquid (QSL) and antiferromagnet (AFM) phases in pyrochlore quantum antife…
Theory of Quantum Phase Transition in Iron-based Superconductors with Half-Dirac Nodal Electron Fermi Surface
Imam Makhfudz
The quantum phase transition in iron-based superconductors with 'half-Dirac' node at the electron Fermi surface as a structural phase transition described in terms of nematic…
Inertia and chiral edge modes of a skyrmion magnetic bubble
Imam Makhfudz, Benjamin Krueger, Oleg Tchernyshyov
The dynamics of a vortex in a thin-film ferromagnet resembles the motion of a charged massless particle in a uniform magnetic field. Similar dynamics is expected for other magnetic…
Pnictide Half-Dirac Nodal Quasiparticle Scaling Properties in Vortex State
Imam Makhfudz
In this work we investigate the scaling properties of quasiparticles of Pnictide with "half-Dirac" node under magnetic field in vortex state. By computing the density of states, we…