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Department of Physics: Recent submissions

  • A Bayesian chemical evolution model of the DustPedia galaxy M74 
    Calura, Francesco; Palla, Marco; Morselli, Laura; Spitoni, Emanuele; Casasola, Viviana; Verma, Kuldeep; Enia, Andrea; Meneghetti, Massimo; Bianchi, Simone; Pozzi, Francesca; Gruppioni, Carlotta (Oxford University Press, 2023-08-01)
    We introduce a new, multizone chemical evolution model of the DustPedia galaxy M74, calibrated by means of Markov Chain Monte Carlo methods. We take into account the observed stellar and gas density profiles and use Bayesian ...
  • Enhancing the temperature sensing property of a Ca0.79−xBixEr0.01Yb0.2MoO4 phosphor via local symmetry distortion and reduction in non-radiative channels 
    Singh, Sachin; Kachhap, Santosh; Sharma, Manisha; Singh, Sunil Kumar (Royal Society of Chemistry, 2023-05-16)
    We demonstrate an enhancement in the upconversion (UC) emission and temperature sensing property of a CaMoO4:Er/Yb phosphor via distortion of the local symmetry environments and reduction in no-radiative channels. Bi3+ ion ...
  • Reconnection-generated Plasma Flows in the Quasi-separatrix Layer in Localized Solar Corona 
    Mondal, Sripan; Srivastava, Abhishek K.; Mishra, Sudheer K.; Sangal, K; Kayshap, Pradeep; Guo, Yang; Pontin, David I; Uritsky, Vadim M.; Ofman, Leon; Wang, Tongjiang (Institute of Physics, 2023-08-04)
    Multiwavelength observations of the propagating disturbances (PDs), discovered by Atmospheric Imaging Assembly (AIA) on board Solar Dynamics Observatory (SDO), are analyzed to determine their driving mechanism and physical ...
  • Magnetotransport properties and Fermi surface topology of the nodal line semimetal InBi 
    Dan, Sambhab; Kargeti, Kuldeep; Sahoo, R.C.; Dan, Shovan; Pal, Debarati; Verma, Sunil; Chakravarty, Sujay; Panda, S.K.; Patil, S. (American Physical Society, 2023-05-05)
    In the present study, we have thoroughly characterized the 3D Fermi surface of a topological nodal line semimetal InBi via the Shubnikov-de Haas oscillations and density functional theory. The nitty-gritty of its full 3D ...
  • Is the observable Universe consistent with the cosmological principle? 
    Kumar Aluri, Pavan; Cea, Paolo; Chingangbam, Pravabati; Chu, Ming-Chung; Clowes, Roger G; Hutsemékers, Damien; Kochappan, Joby P; Lopez, Alexia M; Liu, Lang; Martens, Niels C M; Martins, C.J.A.P.; Migkas, Konstantinos; Ó Colgáin, Eoin; Pranav, Pratyush; Shamir, Lior; Singal, Ashok K; Sheikh-Jabbari, M.M.; Wagner, Jenny; Wang, Shao-Jiang; Wiltshire, David L; Yeung, Shek; Yin, Lu; Zhao, Wen (Institute of Physics, 2023-04-23)
    The cosmological principle (CP)—the notion that the Universe is spatially isotropic and homogeneous on large scales—underlies a century of progress in cosmology. It is conventionally formulated through the Friedmann-Lema ...
  • Suppression of one-dimensional weak localization by band asymmetry 
    Arora, Kartikeya; Singh, Rajeev; Hosur, Pavan (American Physical Society, 2023-08-23)
    We investigate disorder-induced localization in metals that break time-reversal and inversion symmetries through their energy dispersion, ϵk≠ϵ-k, but lack Berry phases. In the perturbative regime of disorder, we show that ...
  • Focused polarization ellipse field singularities: interaction of spin-orbital angular momentum and the formation of optical Möbius strips 
    Pal, Sushanta Kumar; Somers, Lavi; Singh, Rakesh Kumar; Senthilkumaran, P.; Arie, Ady (Institute of Physics, 2023-04-06)
    We study here the intensity distribution and formation of optical polarization Möbius strips by tightly focusing of C-point singularity beams. These beams are characterized by a central circular polarization point (C-point) ...
  • Topological dynamical quantum phase transition in a quantum skyrmion phase 
    Vijayan, Vipin; Chotorlishvili, L.; Ernst, A.; Parkin, S.S.P.; Katsnelson, M.I.; Mishra, S.K. (American Physical Society, 2023-03-29)
    The quantum skyrmionic phase is modeled in a two-dimensional helical spin lattice. This topological skyrmionic phase retains its nature in a large parameter space before moving to a ferromagnetic phase. Next-nearest-neighbor ...
  • Towards 21-cm intensity mapping at z = 2.28 with uGMRT using the tapered gridded estimator - II. Cross-polarization power spectrum 
    Elahi, Kh.Md. Asif; Bharadwaj, Somnath; Ghosh, Abhik; Pal, Srijita; Ali, Sk. Saiyad; Choudhuri, Samir; Chakraborty, Arnab; Datta, Abhirup; Roy, Nirupam; Choudhury, Madhurima; Dutta, Prasun (Oxford University Press, 2023-04-01)
    Neutral hydrogen (H I) 21-cm intensity mapping (IM) offers an efficient technique for mapping the large-scale structures in the Universe. We introduce the 'Cross' Tapered Gridded Estimator (Cross TGE), which cross-correlates ...
  • Origin of Quasi-periodic Pulsation at the Base of a Kink-unstable Jet 
    Mishra, Sudheer K.; Sangal, Kartika; Kayshap, Pradeep; Jelínek, Petr; Srivastava, A.K.; Rajaguru, S.P. (Institute of Physics, 2023-03-13)
    We studied a blowout jet that occurred at the west limb of the Sun on 2014 August 29 using high-resolution imaging/spectroscopic observations provided by the Solar Dynamics Observatory/Atmospheric Imaging Assembly and the ...
  • Flavour bounds on the flavon of a minimal and a non-minimal Z2× ZN symmetry 
    Abbas, Gauhar; Singh, Vartika; Singh, Neelam; Sain, Ria (Institute for Ionics, 2023-04-19)
    We investigate flavour bounds on the Z2× Z5 and Z2× Z9 flavour symmetries. These flavour symmetries are a minimal and a non-minimal forms of the Z2× ZN flavour symmetry, that can provide a simple set-up for the Froggatt–Nielsen ...
  • Metric-affine effects in crystallization processes of white dwarfs 
    Kalita, Surajit; Sarmah, Lupamudra; Wojnar, Aneta (American Physical Society, 2023-02-28)
    We analyze the effects of modified gravity on specific heats of electrons and ions, Debye temperature, crystallization process, and cooling mechanism in white dwarfs. We derive the Lane-Emden-Chandrasekhar equation and ...
  • Fabrication and characterization of Al/Ta thin films as metal junctions for solar cell applications 
    Monga, Kamil; Labbafi, Larak; Trivedi, Harshita; Ghorannevis, Zohreh; Singh Parmar, Avanish; Chaudhary, Shilpi (Elsevier B.V., 2022-12-06)
    In the present work, the effect of deposition time (10 min, 20 min, and 30 min) on the structural, morphological, and electrical properties of Al/Ta thin films has been investigated. The XRD and microscopy results revealed ...
  • Ghost diffraction: A spatial statistical approach 
    ., Manisha; Tiwari, Vipin; Bisht, Nandan S.; Das, Bhargab; Singh, Rakesh Kumar (Elsevier B.V., 2022-09-17)
    We report a new method to reconstruct a two-dimensional object in Ghost diffraction scheme using a spatial statistical optics approach. This is implemented by using a static diffuser rather than a pseudo thermal light ...
  • Fabrication of white light emitting diodes via high yield surface passivated carbon quantum dots doped with terbium 
    Pratap, Ravi; Parmar, Avanish Singh (Royal Society of Chemistry, 2023-01-11)
    Exploiting the unique characteristics of various materials to create novel hybrid materials opens up innovative possibilities for cutting-edge applications across numerous fields. Here, we have synthesized novel surface ...
  • Examining statistical isotropy of CMB low multipoles from Planck PR4 data 
    Aluri, Pavan Kumar; Patel, Sanjeet Kumar (Elsevier B.V., 2022-11-24)
    Low multipoles (l) in cosmic microwave background (CMB) temperature anisotropies have shown some ‘peculiarities’ when examined since the release of the full sky CMB maps, using a variety of tests. In this paper, we concern ...
  • Stokes correlation to estimate topological charge from the speckle pattern 
    Sarkar, Tushar; Singh, Rakesh Kumar (Springer Science and Business Media Deutschland GmbH, 2022-12-15)
    The orbital angular momentum (OAM) of the vortex or helical beam, connected with the topological charge (TC) of the beam, has been used as an alternative degree of freedom to encode and decode the information in the optical ...
  • Study of phase evolution and dielectric properties of Sr2Mn0.7Sn0.3O4 
    Nirala, Gurudeo; Upadhyay, Shail (University of Novi Sad, Faculty of Technology, 2023-06-15)
    Ruddlesden-Popper oxide Sr2Mn0.7Sn0.3O4 was synthesized by solid state method by calcining at different temperatures between 1200 and 1500 °C. The phase evolution during thermal treatments was investigated and it was shown ...
  • Imaging Incoherent Target Using Hadamard Basis Patterns † 
    Karmakar, Tanushree; Singh, Rajeev; Singh, Rakesh Kumar (Multidisciplinary Digital Publishing Institute (MDPI), 2023-03-31)
    In this paper, we present a correlation-based imaging technique in a single-pixel imaging scheme using Hadamard basis illumination. The Hadamard basis, which has the characteristics of a two-bit value {−1, 1} and sparsity ...
  • Holography with Incoherent Light 
    Gautam, Akanksha; T S, Athira; Naik, Dinesh N.; Narayanmurthy C.S.; Singh, Rajeev; Singh, Rakesh Kumar (Multidisciplinary Digital Publishing Institute (MDPI), 2023-03-04)
    Conventional digital holography uses the technique of combining two coherent light fields and the numerical reconstruction of the recorded hologram leads to the object amplitude and phase information. Despite significant ...

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