26 citations · 53 across the 15 of their papers we have counts for
15 papers
Systematic dynamical mean-field theory study of 3d perovskite oxides with uniform Coulomb interactions
Antik Sihi, Caden Ginter, Kristjan Haule +1
Strongly correlated transition-metal perovskite oxides pose a fundamental challenge for electronic-structure theory and for large-scale, data-driven materials discovery. While DFT+…
Self-Consistent Coulomb Interactions from Constrained Dynamical Mean-Field Theory
Antik Sihi, Subhasish Mandal, Kristjan Haule
We develop a self-consistent first-principles framework for determining the screened Coulomb interaction strength (U) based on constrained dynamical mean-field theory (cDMFT). Unli…
Correlation Enhanced Electron-Phonon Coupling in FeSe/SrTiO at a Magic Angle
Qiang Zou, Antik Sihi, Basu Dev Oli +5
While a predictive theory for unconventional superconductivity in Fe-based superconductors remains elusive, an extensively debated aspect is the interaction between phonons and str…
Half-metallic transport and spin-polarized tunneling through the van der Waals ferromagnet FeGeTe
Anita Halder, Declan Nell, Antik Sihi +3
The recent emergence of van der Waals (vdW) ferromagnets has opened new opportunities for designing spintronic devices. We theoretically investigate the coherent spin-dependent tra…
Enhanced Pauli spin response, failure of Stoner \& spin fluctuation models, and presence of 6 plasmonic excitations in Ni metal
Shivani Bhardwaj, Antik Sihi, Sudhir K. Pandey
We revisit the electronic structure of Ni, using the density functional theory (DFT) and dynamical mean-field theory (DMFT) for the theoretical description of its electronic struct…
First-principles evidence of type-II Weyl phonons in rock-salt Tin Chalcogenides (SnS, SnSe & SnTe) materials
Antik Sihi, Sudhir K. Pandey
Recent studies on different topological materials in condensed matter physics have provided the evidence of topological nature for bosonic particle like phonons by performing vario…
Evidence of phase stability, topological phonon and temperature-induced topological phase transition in rocksalt SnS and SnSe
Antik Sihi, Sudhir K. Pandey
Both SnS and SnSe have been experimentally and theoretically confirmed as topological crystalline insulators in native rocksalt structure. Here, phononic structure, thermodynamical…
Exploring temperature dependent electron-electron interaction of topological crystalline insulators (SnS and SnSe) within Matsubara-time domain
Antik Sihi, Sudhir K. Pandey
Both experimental and theoretical studies show non-trivial topological behaviour in native rocksalt phase for SnS and SnSe and categorize these materials in topological crystalline…
TRACK: A python code for calculating the transport properties of correlated electron systems using Kubo formalism
Antik Sihi, Sudhir K. Pandey
Exploring the transport properties of different materials brings new avenue for basic understanding of emergent phenomena and practical applications in many different fields. Here,…
An ab-initio study of topological and transport properties of YAuPb
Vivek Pandey, Antik Sihi, Sudhir K. Pandey
In the last few decades, the study of topological materials has been carried out on an extensive scale. Half-Heusler alloys are well known for their topological behaviours. In this…
Exploring the suitable theoretical approach for understanding the electronic and magnetic properties of -Iron
Antik Sihi, Sudhir K. Pandey
We present a comparative electronic structure study using DFT and various beyond-DFT (DFT+, , DFT+DMFT) methods for ferromagnetic Iron (Fe) to find better approach for d…
Coexistance of non-Fermi liquid behavior and bi-quadratic exchange coupling in La-substituted CeGe: Non-linear susceptibility and DFT + DMFT study
Karan Singh, Antik Sihi, Sudhir K. Pandey +1
Studies connected with the investigations of non-Fermi liquid (NFL) systems continue to attract interest in condensed matter physics community. Understanding the anomalous physical…
Investigating the effect of temperature dependent many-body interactions on bulk electronic structures and the robust nature of (001) surface states of SnTe
Antik Sihi, Sudhir K. Pandey
Recently, SnTe has gained attention due to its non-trivial topological nature and eco-friendly thermoelectric applications. We report a detailed temperature dependent electronic st…
A detailed electronic structure study of Vanadium metal by using different beyond-DFT methods
Antik Sihi, Sudhir K. Pandey
We report a detailed electronic structure calculation for Vanadium (V) using DFT, DFT+, , and DFT+DMFT methods. The calculated values of , and by cRPA…
Studying the effect of different exchange correlation functionals on the structural and electronic properties of a half-Heusler NaAuS compound
Antik Sihi, Sohan Lal, Sudhir K. Pandey
Theoretically, NaAuS is predicted as topological insulator, while no detail electronic structure study has been done for this compound. Here, we report the structural and electroni…