A5073783733- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- ZnO doping and properties
- Magnetic and transport properties of perovskites and related materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Dielectric properties of ceramics
- Antenna Design and Analysis
- Anodic Oxide Films and Nanostructures
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Ion-surface interactions and analysis
- Copper-based nanomaterials and applications
- Ga2O3 and related materials
- Electronic and Structural Properties of Oxides
- Advanced Antenna and Metasurface Technologies
- Advanced Condensed Matter Physics
- Nanowire Synthesis and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Metamaterials and Metasurfaces Applications
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Gas Sensing Nanomaterials and Sensors
- Semiconductor Quantum Structures and Devices
- Nanofluid Flow and Heat Transfer
Punjab Engineering College
2016-2025
Aditya Birla (India)
2024-2025
Shree Guru Gobind Singh Tricentenary University
2023-2024
Sri Guru Granth Sahib World University
2023-2024
Chandigarh University
2016-2024
Bhabha Atomic Research Centre
2024
Birsa Agricultural University
2024
Sarala Birla University
2024
National Institute of Pharmaceutical Education and Research
2024
Borlaug Institute for South Asia
2024
We put forward double perovskites of the R$_2$NiMnO$_6$ family (with $R$ a rare-earth atom) as new class multiferroics on basis {\it ab initio} density functional calculations. show that changing from La to Y drives ground-state ferromagnetic antiferromagnetic with $\uparrow\uparrow\downarrow\downarrow$ spin patterns. This E$^*$-type ordering breaks inversion symmetry and generates ferroelectric polarization few $\mu C/cm^2$. By analyzing model Hamiltonian we understand microscopic origin...
In this study, the authors present three different metamaterial absorbers (MMAs) namely, T, split‐I (SI) and split‐Jerusalem cross (SJC) with dimensions geometrical configurations. The absorption rates of T‐, SI‐ SJC‐shaped are studied at microwave frequencies. T‐shaped absorber demonstrates perfect 10.19 GHz, making it suitable for single band operation, whereas SI‐shaped exhibits two peaks 9.32 10.75 GHz finding its application in dual operation. However, novel multiple 9.92, 10.42, 10.93,...
This paper presents three self-powered photodetectors namely, p+-bilayer graphene (BLG)/n+-ZnO nanowires (NWs), p+-BLG/n+-Si NWs/p--Si and p+-BLG/n+-ZnO NWs/p--Si. The Silvaco Atlas TCAD software is utilized to characterize the optoelectronic properties of all devices validated by analytical modeling. proposed dual-junction cover broadband spectral response varying from ultraviolet near-infrared wavelengths. dual-heterojunction photodetector exhibits photocurrent switching with rise fall...
MXenes are known for their exceptionally high electrical conductivity, mechanical resilience, and versatile surface chemistry. However, these tend to oxidize under ambient conditions, posing a major hurdle in performance...
We show that charge ordered rare-earth nickelates of the type RNiO3 (R= Ho, Lu, Pr and Nd) are multiferroic with very large magnetically induced ferroelectric (FE) polarizations. This we determine from first principles electronic structure calculations. The emerging FE polarization is directly tied to long-standing puzzle which kind magnetic ordering present in this class materials: its direction size indicate ground-state spin configuration realized. Vice versa, small energy differences...
We show by means of ab initio calculations that the organic molecular crystal TTF-CA is multiferroic: it has an instability to develop spontaneously both ferroelectric and magnetic ordering. Ferroelectricity driven a Peierls transition in its ionic state. Subsequent antiferromagnetic ordering strongly enhances opposing electronic contribution polarization. It so large switches direction total moment. Within extended Hubbard model, we capture essence interactions TTF-CA, confirm presence...
We present novel p <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> -bilayer graphene (BLG) and mercury cadmium telluride (MCT)-based single- dual-junction photodetectors, namely, -BLG/n xmlns:xlink="http://www.w3.org/1999/xlink">-</sup> -MCT -MCT/n -MCT, operating in long infrared regime. The optoelectronic characterizations utilizing Silvaco Atlas TCAD are validated by analytical modeling. All the devices demonstrate self-powered mode...
Abstract In this paper, the ambient temperature multiferroic effect resulting from incorporation of transition metal ions (Fe 3+ and Co 2+ ) in lead-free BST [ <?CDATA ${{Ba}}_{0.7}{{Sr}}_{0.3}({{Fe}}_{x/2}{{Co}}_{x/2}){{Ti}}_{1-x}{O}_{3};{x}=0,0.01,0.03,0.05,0.07$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi mathvariant="italic">Ba</mml:mi> </mml:mrow> <mml:mn>0.7</mml:mn> </mml:msub> mathvariant="italic">Sr</mml:mi>...
Abstract This paper presents an ultra-thin and compact metamaterial absorber (MMA) capable of achieving near-perfect absorption peaks across the C, X, Ku, K frequency bands. The MMA structure features a modified metallic plus-shaped resonator surrounded by symmetric L-shaped resonators within size 13 × mm 2 . exhibits seven at different resonant frequencies including 4.23, 6.48, 10.62, 12.92, 14.03, 17.39, 18.11 GHz. With thickness 0.0225 λ 0.1833 lowest frequency, offers remarkable thinness...
Cupric oxide is multiferroic at unusual high temperatures. From density functional calculations we find that the low-T magnetic phase paraelectric and higher-T one ferroelectric, with a size direction of polarization in good agreement experiment. By mapping ab initio results on an effective spin model Monte Carlo high-T state non-collinearity inversion symmetry breaking stabilize each other via Dzyaloshinskii Moriya interaction. This leads to novel mechanism for multiferroicity, particular...
Abstract The momentum‐dependent splitting of spin‐bands in an electronic system is known as the “Rashba effect.” Systems with Rashba effect possess a Dirac point momentum space, which may act source Berry's phase for conduction electrons such system. Herein, Shubnikov–de Haas oscillations (SdH) at conducting interface EuO–KTaO 3 (KTO) are reported. observed SdH suggest presence two Fermi surfaces. For both surfaces, seen. Strong spin–orbit coupling also this existence surfaces along...
In this article, we design a metamaterial absorber (MMA) to provide quad-band absorption characteristics in terahertz range. The proposed MMA structure comprises of Gemini-shaped resonator, graphene, SiO2 and metallic plane demonstrating multiple peaks at 1.29, 3.32, 3.85, 4.56 THz with absorptivities greater than 90%. mechanism can be attributed the high-order resonances analyzed by electric field distribution. Further, simulated results are verified using equivalent circuit model obtained...
Using a joint approach of density functional theory and model calculations, we demonstrate that prototypical charge ordered half-doped manganite, La$_{1/2}$Ca$_{1/2}$MnO$_3$ is multiferroic. The combination peculiar charge-orbital ordering tendency to form spin dimers breaks inversion symmetry, leads ferroelectric ground-state with polarization up several $\mu C/cm^2$. presence improper ferroelectricity does not depend on hotly debated structural details this material: in the Zener-polaron...