Browsing NTNU Open by Author "Alidoust, Mohammad"
Now showing items 1-19 of 19
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Asymmetric ferromagnetic resonance, universal Walker breakdown, and counterflow domain wall motion in the presence of multiple spin-orbit torques
Linder, Jacob; Alidoust, Mohammad (Journal article; Peer reviewed, 2013)Measurement of the maximum blood flow velocity is the primary means for determining the degree of carotid stenosis using ultrasound. The current standard for estimating the maximum velocity is Pulsed Wave (PW) Doppler with ... -
Comparison of optical response from DFT random phase approximation and a low-energy effective model: Strained phosphorene
Alidoust, Mohammad; Isachsen, Erlend E; Halterman, Klaus; Akola, Jaakko (Peer reviewed; Journal article, 2021)The engineering of the optical response of materials is a paradigm that demands microscopic-level accuracy and reliable predictive theoretical tools. Here we compare and contrast the dispersive permittivity tensor, using ... -
Density functional simulations of pressurized Mg-Zn and Al-Zn alloys
Alidoust, Mohammad; Kleiven, David; Akola, Jaakko (Peer reviewed; Journal article, 2020)Binary Mg-Zn and Al-Zn alloys have been investigated theoretically under static isotropic pressure. The stable phases of these binaries on both initially hexagonal-close-packed (hcp) and face-centered-cubic (fcc) lattices ... -
Dielectric Response of Phosphorene Subject to Strain
Isachsen, Erlend Elias (Master thesis, 2021)I denne avhandlingen presenteres en teoretisk studie av den dielektriske responsen for det to-dimensjonale (2D) materialet fosforén utsatt for deformasjon, med utgangspunkt i en effektiv lav-energi k∙p Hamilton-operator. ... -
Generalization of the Recursive Green's Function Approach to Spin-Orbit Coupled Graphene
Hallaråker, Magnus Halvor (Master thesis, 2021)I denne avhandlingen har vi generalisert den Rekursive Green’s Funksjons-metoden for å studere ladning- og spinnstrømmer samt deres romfordeling i nanoflak av grafen. For å kunne simulere et realistisk system hvor ... -
Josephson effect in graphene bilayers with adjustable relative displacement
Alidoust, Mohammad; Jauho, Anti-pekka; Akola, Jaakko (Peer reviewed; Journal article, 2020)The Josephson current is investigated in a superconducting graphene bilayer where pristine graphene sheets can make in-plane or out-of-plane displacements with respect to each other. The superconductivity can be of an ... -
Machine-learned model Hamiltonian and strength of spin–orbit interaction in strained Mg2X (X = Si, Ge, Sn, Pb)
Alidoust, Mohammad; Rothmund, Erling Velten; Akola, Jaakko (Peer reviewed; Journal article, 2022)Machine-learned multi-orbital tight-binding (MMTB) Hamiltonian models have been developed to describe the electronic characteristics of intermetallic compounds Mg2Si, Mg2Ge, Mg2Sn, and Mg2Pb subject to strain. The MMTB ... -
Meissner effect probing of odd-frequency triplet pairing in superconducting spin valves
Alidoust, Mohammad; Halterman, K; Linder, Jacob (Journal article, 2014)Superconducting correlations which are long ranged in magnetic systems have attracted much attention due to their spin-polarization properties and potential use in spintronic devices. Whereas experiments have demonstrated ... -
Multi-Orbital Tight-Binding Models for Spin-Orbit Coupled Phosphorene and Mg2X (X=Si, Ge, Sn, Pb) Compounds Subject to Strain
Rothmund, Erling velten (Master thesis, 2022)Tight-binding (TB) modeller for spinn-bane koblet ett-lags svart fosfor og Mg2X forbindelser (X=Si, Ge, Sn, Pb) utvikles og tilpasses den elektroniske båndstrukturen forutsett av density-functional theory (DFT). Målet er ... -
Non-Fraunhofer Interference Pattern in Inhomogeneous Ferromagnetic Josephson Junctions
Alidoust, Mohammad; Sewell, Granville; Linder, Jacob (Journal article, 2012)Generic conditions are established for producing a non-Fraunhofer response of the critical supercurrent subject to an external magnetic field in ferromagnetic Josephson junctions. Employing the quasiclassical Keldysh-Usadel ... -
Phase-controlled proximity effect in ferromagnetic Josephson junctions: Calculation of the density of states and the electronic specific heat
Alidoust, Mohammad; Rashedi, Gholamreza; Linder, Jacob; Sudbø, Asle (Journal article; Peer reviewed, 2010)We study the thermodynamic properties of a dirty ferromagnetic S|F|S Josephson junction with s-wave superconducting leads in the low-temperature regime. We employ a full numerical solution with a set of realistic parameters ... -
phi-state and inverted Fraunhofer pattern in nonaligned Josephson junctions
Alidoust, Mohammad; Linder, Jacob (Journal article; Peer reviewed, 2013)A generic nonaligned Josephson junction in the presence of an external magnetic field is theoretically considered and an unusual flux-dependent current-phase relation (CPR) is revealed. We explain the origin of the anomalous ... -
Proximity effects and transport properties of nano-scale systems with multiple broken symmetries
Alidoust, Mohammad (Doktoravhandlinger ved NTNU, 1503-8181; 2013:359, Doctoral thesis, 2013) -
Singlet-triplet superconducting quantum magnetometer
Alidoust, Mohammad; Halterman, K; Linder, Jacob (Journal article, 2013)Motivated by the recent experimental realization of a quantum interference transistor based on the superconducting proximity effect, we here demonstrate that the inclusion of a textured ferromagnet both strongly enhances ... -
Spin-polarized Josephson current in superconductor/ferromagnet/superconductor junctions with inhomogeneous magnetization
Alidoust, Mohammad; Linder, Jacob; Rashedi, Gholamreza; Yokoyama, Takehito; Sudbø, Asle (Journal article; Peer reviewed, 2010)We study numerically the properties of spin transport and charge transport in a current-biased nanoscale diffusive superconductor/ferromagnet/superconductor junction when the magnetization texture is nonuniform. Specifically, ... -
Spin-triplet supercurrent through inhomogeneous ferromagnetic trilayers
Alidoust, Mohammad; Linder, Jacob (Journal article; Peer reviewed, 2010)Motivated by a recent experiment [J. W. A. Robinson, J. D. S. Witt, and M. G. Blamire, Science 329, 5987 (2010)], we report here the possibility of establishing a long-range spin-triplet supercurrent through an inhomogeneous ... -
Strain-engineered widely tunable perfect absorption angle in black phosphorus from first principles
Alidoust, Mohammad; Halterman, Klaus; Pan, Douxing; Willatzen, Morten; Akola, Jaakko (Peer reviewed; Journal article, 2020)Using the density functional theory of electronic structure, we compute the anisotropic dielectric response of bulk black phosphorus subject to strain. Employing the obtained permittivity tensor, we solve Maxwell’s equations ... -
Superconducting phase transistor in diffusive four-terminal ferromagnetic Josephson junctions
Alidoust, Mohammad; Sewell, Granville; Linder, Jacob (Journal article, 2012)We study diffusive magnetic Josephson junctions with four superconducting terminals in the weak proximity limit where the leads are arranged in cross form. Employing the linearized Keldysh-Usadel technique, the anomalous ... -
Tunable supercurrent at the charge neutrality point via strained graphene junctions
Alidoust, Mohammad; Linder, Jacob (Journal article; Peer reviewed, 2011)We theoretically calculate the charge-supercurrent through a ballistic graphene junction where superconductivity is induced via the proximity-effect. Both monolayer and bilayer graphene are considered, including the ...