275 citations · 2k across the 40 of their papers we have counts for
40 papers
Flat-band optical phonons in twisted bilayer graphene
Emmanuele Cappelluti, Jose Angel Silva-Guillén, Habib Rostami +1
Twisting bilayer sheets of graphene have been proven to be an efficient way to manipulate the electronic Dirac-like properties, resulting in flat bands at magic angles. Inspired by…
Light-induced Nonlinear Spin Hall Current in Single-layer WTe
Pankaj Bhalla, Habib Rostami
In this theoretical investigation, we analyze light-induced nonlinear spin Hall currents in a gated single-layer 1T-WTe, flowing transversely to the incident laser polarizat…
Light-induced shear phonon splitting and instability in bilayer graphene
Habib Rostami
Coherent engineering of landscape potential in crystalline materials is a rapidly evolving research field. Ultrafast optical pulses can manipulate low-frequency shear phonons in va…
Probing Electronic States in Monolayer Semiconductors through Static and Transient Third-Harmonic Spectroscopy
Yadong Wang, Fadil Iyikanat, Habib Rostami +10
Electronic states and their dynamics are of critical importance for electronic and optoelectronic applications. Here, we probe various relevant electronic states in monolayer MoS2,…
Giant Shear Displacement by Light-Induced Raman Force in Bilayer Graphene
Habib Rostami
Coherent excitation of shear phonons in van der Waals layered materials is a non-destructive mechanism to fine-tune the electronic state of the system. We develop a diagrammatic th…
Strain-driven chiral phonons in two-dimensional hexagonal materials
Habib Rostami, Francisco Guinea, Emmanuele Cappelluti
Hexagonal two-dimensional materials with broken inversion symmetry (as BN or transition metal dichalcodenides) are known to sustain chiral phonons with finite angular momentum, add…
Second Harmonic Helicity and Faraday Rotation in Gated Single-Layer 1T-WTe
Pankaj Bhalla, Habib Rostami
Single-layer of 1T phase of WTe provides a rich platform for exotic physical properties such as nonlinear Hall effect and high-temperature quantum spin hall transport. Utili…
Pseudogauge field driven acoustoelectric current in two-dimensional hexagonal Dirac materials
Pankaj Bhalla, Giovanni Vignale, Habib Rostami
Using a diagrammatic scheme, we study the acoustoelectric effects in two-dimensional (2D) hexagonal Dirac materials due to the sound-induced pseudo-gauge field. We analyze both uni…
Gauge invariance and Ward identities in nonlinear response theory
Habib Rostami, Mikhail I. Katsnelson, Giovanni Vignale +1
We present a formal analysis of nonlinear response functions in terms of correlation functions in real- and imaginary-time domains. In particular, we show that causal nonlinear res…
Nonlinear exciton drift in piezoelectric two-dimensional materials
Vanik Shahnazaryan, Habib Rostami
Noncentrosymmetric nature of single-layer transition metal dichalcogenides manifest itself in the finite piezoelectricity and valley-Zeeman coupling. We microscopically model nonli…
Many-Body Effects in Third Harmonic Generation of Graphene
Habib Rostami, Emmanuele Cappelluti
The low-energy (intraband) range of the third harmonic generation of graphene in the terahertz regime is governed by the damping terms induced by the interactions. A controlled man…
Dominant Role of Two-Photon Vertex in Nonlinear Response of Dirac Materials
Habib Rostami, Emmanuele Cappelluti
Using a conserving Baym-Kadanoff approach, we present a fully compelling theory of nonlinear dc response of a Dirac system to electric fields in the presence of disorder scattering…
Acoustogalvanic effect in Dirac and Weyl semimetals
P. O. Sukhachov, H. Rostami
The acoustogalvanic effect is proposed as a nonlinear mechanism to generate a direct electric current by passing acoustic waves in Dirac and Weyl semimetals. Unlike the standard ac…
Layer and orbital interference effects in photoemission from transition metal dichalcogenides
Habib Rostami, Klara Volckaert, Nicola Lanata +10
In this work, we provide an effective model to evaluate the one-electron dipole matrix elements governing optical excitations and the photoemission process of single-layer (SL) and…
Momentum-resolved linear dichroism in bilayer MoS
Klara Volckaert, Habib Rostami, Deepnarayan Biswas +19
Inversion-symmetric crystals are optically isotropic and thus naively not expected to show dichroism effects in optical absorption and photoemission processes. Here, we find a stro…
Probing quantum criticality using nonlinear Hall effect in a metallic Dirac system
Habib Rostami, Vladimir Juričić
Interaction driven symmetry breaking in a metallic (doped) Dirac system can manifest in the spontaneous gap generation at the nodal point buried below the Fermi level. Across this…
Hot electrons modulation of third harmonic generation in graphene
G. Soavi, G. Wang, H. Rostami +8
Hot electrons dominate the ultrafast (fs-ps) optical and electronic properties of metals and semiconductors and they are exploited in a variety of applications including phot…
Exciton routing in the heterostructure of TMD and paraelectrics
V. Shahnazaryan, O. Kyriienko, H. Rostami
We propose a scheme for the spatial exciton energy control and exciton routing in a transition metal dichalcogenide (TMD) monolayer which lies on a quantum paraelectric substrate.…
Transient Hot Electron Dynamics in Single-Layer TaS
Federico Andreatta, Habib Rostami, Antonija Grubišić Čabo +12
Using time- and angle-resolved photoemission spectroscopy, we study the response of metallic single layer TaS in the 1H structural modification to the generation of excited car…
Pseudo-Euler equations from nonlinear optics: plasmon-assisted photodetection beyond hydrodynamics
Alessandro Principi, Denis Bandurin, Habib Rostami +1
A great deal of theoretical and experimental efforts have been devoted in the last decades to the study of long-wavelength photodetection mechanisms in field-effect transistors hos…
Helical metals and insulators and sheet singularity of inflated Berry monopole
Habib Rostami, Emmanuele Cappelluti, Alexander V. Balatsky
We study the new phases of interacting Dirac matter that host novel Berry signatures. We predict a topological Lifshitz phase transition caused by the changes of a Dirac cone inter…
Impurity effects and bandgap-closing in massive Dirac systems
Habib Rostami, Emmanuele Cappelluti
We investigate the effects in the spectral properties of a massive Dirac system of the dynamical renormalization induce by disorder/impurity scattering within the self-consistent B…
Broadband, electrically tuneable, third harmonic generation in graphene
G. Soavi, G. Wang, H. Rostami +16
Optical harmonic generation occurs when high intensity light (W/m) interacts with a nonlinear material. Electrical control of the nonlinear optical response enables…
Piezoelectricity and valley Chern number in inhomogeneous hexagonal 2D crystals
Habib Rostami, Francisco Guinea, Marco Polini +1
Conversion of mechanical forces to electric signal is possible in non-centrosymmetric materials due to linear piezoelectricity. The extraordinary mechanical properties of two-dimen…