Search Results - "Ghorashi, Sayed Ali Akbar"

Higher-Order Weyl Semimetals by Ghorashi, Sayed Ali Akbar, Li, Tianhe, Hughes, Taylor L

“…We investigate higher-order Weyl semimetals (HOWSMs) having bulk Weyl nodes attached to both surface and hinge Fermi arcs. We identify a new type of Weyl node,…”
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Vortex and Surface Phase Transitions in Superconducting Higher-order Topological Insulators by Ghorashi, Sayed Ali Akbar, Hughes, Taylor L., Rossi, Enrico

“…Topological insulators, having intrinsic or proximity-coupled s-wave superconductivity, host Majorana zero modes (MZMs) at the ends of vortex lines. The MZMs…”
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Signature of Correlated Insulator in Electric Field Controlled Superlattice by Sun, Jiacheng, Akbar Ghorashi, Sayed Ali, Watanabe, Kenji, Taniguchi, Takashi, Camino, Fernando, Cano, Jennifer, Du, Xu

“…On a two-dimensional crystal, a “superlattice” with nanometer-scale periodicity can be imposed to tune the Bloch electron spectrum, enabling novel physical…”
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Critical Percolation without Fine-Tuning on the Surface of a Topological Superconductor by Ghorashi, Sayed Ali Akbar, Liao, Yunxiang, Foster, Matthew S

“…We present numerical evidence that most two-dimensional surface states of a bulk topological superconductor (TSC) sit at an integer quantum Hall plateau…”
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Hybrid Dispersion Dirac Semimetal and Hybrid Weyl Phases in Luttinger Semimetals: A Dynamical Approach by Ghorashi, Sayed Ali Akbar

“…It is shown that hybrid Dirac and Weyl semimetals can be realized in a 3D Luttinger semimetal with quadratic band touching (QBT). This is illustrated using a…”
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Controllable Synthesis of Silver Nanoparticles Using Citrate as Complexing Agent: Characterization of Nanopartciles and Effect of pH on Size and Crystallinity by Mahdi Kamali, Sayed Ali Akbar Ghorashi, Mohammad Ali Asadollahi

“…A method for the controllable synthesis of silver nanoparticles based on a complexing agent method was developed. Citric acid was used as a complexing agent…”
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Multilayer graphene with a superlattice potential by Ghorashi, Sayed Ali Akbar, Cano, Jennifer

“…Bernal stacked bilayer graphene subject to a superlattice potential can realize topological and stacked flat bands [1]. In the present work, we extend the…”
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Topological and stacked flat bands in bilayer graphene with a superlattice potential by Ghorashi, Sayed Ali Akbar, Dunbrack, Aaron, Abouelkomsan, Ahmed, Sun, Jiacheng, Du, Xu, Cano, Jennifer

“…We show that bilayer graphene in the presence of a 2D superlattice potential provides a highly tunable setup that can realize a variety of flat band phenomena…”
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Signature of Correlated Insulator in Electric Field Controlled Superlattice by Sun, Jiacheng, Ghorashi, Sayed Ali Akbar, Watanabe, Kenji, Taniguchi, Takashi, Camino, Fernando, Cano, Jennifer, Du, Xu

“…Nano Letters, Vol 24/Issue 43 2024 The Bloch electron energy spectrum of a crystalline solid is determined by the underlying lattice structure at the atomic…”
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Quantum Geometry Induced Nonlinear Transport in Altermagnets by Fang, Yuan, Cano, Jennifer, Ghorashi, Sayed Ali Akbar

“…Quantum geometry plays a pivotal role in the second-order response of PT-symmetric antiferromagnets. Here we study the nonlinear response of 2D altermagnets…”
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Topological and Stacked Flat Bands in Bilayer Graphene with a Superlattice Potential by Ghorashi, Sayed Ali Akbar, Dunbrack, Aaron, Abouelkomsan, Ahmed, Sun, Jiacheng, Du, Xu, Cano, Jennifer

“…We show that bilayer graphene in the presence of a 2D superlattice potential provides a highly tunable setup that can realize a variety of flat band phenomena…”
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Non-Hermitian Higher-Order Weyl Semimetals by Ghorashi, Sayed Ali Akbar, Li, Tianhe, Sato, Masatoshi

“…We study non-Hermitian higher-order Weyl semimetals (NHHOWSMs) possessing real spectra and having inversion $\mathcal{I}$ ($\mathcal{I}$-NHHOWSM) or…”
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Non-Hermitian Higher-Order Dirac Semimetals by Ghorashi, Sayed Ali Akbar, Li, Tianhe, Sato, Masatoshi, Hughes, Taylor L

“…In this article we study 3D non-Hermitian higher-order Dirac semimetals (NHHODSMs). Our focus is on $C_4$-symmetric non-Hermitian systems where we investigate…”
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Hybrid Dispersion Dirac semimetal and Hybrid Weyl phases in Luttinger Semimetals: A dynamical approach by Ghorashi, Sayed Ali Akbar

“…We show that hybrid Dirac and Weyl semimetals can be realized in a three-dimensional Luttinger semimetal with quadratic band touching (QBT). We illustrate this…”
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Gate-tunable topological phases in superlattice modulated bilayer graphene by Zeng, Yongxin, Wolf, Tobias M. R, Huang, Chunli, Wei, Nemin, Ghorashi, Sayed Ali Akbar, MacDonald, Allan H, Cano, Jennifer

“…Phys. Rev. B 109, 195406 (2024) Superlattice potential modulation can produce flat minibands in Bernal-stacked bilayer graphene. In this work we study how band…”
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Vortex and Surface Phase Transitions in Superconducting Higher-order Topological Insulators by Ghorashi, Sayed Ali Akbar, Hughes, Taylor L, Rossi, Enrico

“…Phys. Rev. Lett. 125, 037001 (2020) Topological insulators (TIs) having intrinsic or proximity-coupled s-wave superconductivity host Majorana zero modes (MZMs)…”
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Higher-order Weyl Semimetals by Ghorashi, Sayed Ali Akbar, Li, Tianhe, Hughes, Taylor L

“…Phys. Rev. Lett. 125, 266804 (2020) We investigate higher-order Weyl semimetals (HOWSMs) having bulk Weyl nodes attached to both surface and hinge Fermi arcs…”
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Altermagnetic Routes to Majorana Modes in Zero Net Magnetization by Ghorashi, Sayed Ali Akbar, Hughes, Taylor L, Cano, Jennifer

“…We propose heterostructures that realize first and second order topological superconductivity with vanishing net magnetization by utilizing altermagnetism…”
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Second-order Dirac superconductors and magnetic field induced Majorana hinge modes by Ghorashi, Sayed Ali Akbar, Hu, Xiang, Hughes, Taylor L, Rossi, Enrico

“…Phys. Rev. B 100, 020509 (2019) We identify three-dimensional higher-order superconductors characterized by the coexistence of one-dimensional Majorana hinge…”
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Criticality Across the Energy Spectrum from Random, Artificial Gravitational Lensing in Two-Dimensional Dirac Superconductors by Ghorashi, Sayed Ali Akbar, Karcher, Jonas F, Davis, Seth M, Foster, Matthew S

“…Phys. Rev. B 101, 214521 (2020) We numerically study weak, random, spatial velocity modulation ["quenched gravitational disorder" (QGD)] in two-dimensional…”
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