SAHA INSTITUTE OF NUCLEAR PHYSICS
Department of Atomic Energy, Govt. of India
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Prof. Krishnakumar S. R. Menon

Senior Professor
Room No : 1220
Ext. : 1220
Email id : krishna.menon[AT]saha.ac.in
Division :
Facilities :
Centre :
Addl. Charge : Head, Computer Section
Papers in Journals
  1. Subrata Paul, Bikash Das, Arunava Kar, Shuvankar Das, Smruti Ranjan Mohanty, Kenji Watanabe, Takashi Taniguchi, Subhadeep Datta, and Krishnakumar S. R. Menon, Residue-free layered material interfaces for device processing, Appl. Surf. Sci. (Accepted 2024).
  2. Vinut R Vadagavi, R. Imran Jafri, Krishnakumar S. R. Menon and Suman Manda, Tuning the electronic dimensionality and bandgap in Cs2AgBiX6 (X = Br, Cl) for photovoltaics: A DFT-1/2 study of cation disorder, Phys. Chem. Chem. Phys., 2024, DOI: 10.1039/D4CP03808H
  3. Suman Mandal and Krishnakumar S. R. Menon, Hole-states in Li doped NiO: Doping dependence of Zhang-Rice spectral weight, Phys. Chem. Chem. Phys 26, 27735 (2024).
  4. Asish K. Kundu, Polina M. Sheverdyaeva, Paolo Moras, Krishnakumar S. R. Menon, Subhasish Mandal, and Carlo Carbone, Spin Selective Evolution of Zhang-Rice State in Binary Transition Metal Oxide, Phys. Rev. B 109, 195111 (2024).
  5. Suvankar Chakraborty and Krishnakumar S. R. Menon, Tin oxide thin films on Ag(111): thickness and temperature dependent study of surface structure and electronic properties, Thin Solid Films 795, 140307 (2024).
  6. Smruti Ranjan Mohanty, Subrata Paul, and Krishnakumar S. R. Menon, Material surface characterization using low-energy electron microscopy and photoemission electron microscopy, Indian J Phys 97, 2395–2404 (2023). https://doi.org/10.1007/s12648-022-02577-9
  7. Smruti Ranjan Mohanty, Arunava Kar, Subrata Paul, and Krishnakumar S. R. Menon, Growth and reconstructions of Pb ultrathin films on Si(100) surfaces, Indian J Phys 97, 751–755 (2023). https://doi.org/10.1007/s12648-022-02439-4
  8. Arunava Kar, Sanjoy Kr Mahatha, and Krishnakumar S. R. Menon, Polarization-dependent electronic structure of Ag quantum well states on the MoS2(0001) surface using ARPES and DFT studies, Phys. Rev. B 106, 235146 (2022).
  9. Arunava Kar, Arpan Das, Smruti Ranjan Mohanty, Shobhana Narasimhan, and Krishnakumar S. R. Menon, Evolution of geometric and electronic structures of oxygen-induced superstructures on Mo(110) surface: A LEED, ARPES, and DFT study, Phys. Rev. B 106, 045128 (2022).
  10. Bikash Das, Sujan Maity, Subrata Paul, Kapildeb Dolui, Subham Paramanik, Sanjib Naskar, Smruti Ranjan Mohanty, Supriya Chakraborty, Anudeepa Ghosh, Mainak Palit, Kenji Watanabe, Takashi Taniguchi, Krishnakumar S. R. Menon, and Subhadeep Datta, Manipulating Edge Current in Hexagonal Boron Nitride via Doping and Friction, ACS Nano 15, 20203 (2021).
  11. Bibhuti Bhusan Jena, Arunava Kar, Sukanta Barman, Suman Mandal, and Krishnakumar S. R. Menon, Magnetic coupling across the antiferromagnetic-antiferromagnetic interface, J. Phys. D: Appl. Phys. 54, 325001 (2021).
  12. Asish K. Kundu, Sukanta Barman, and Krishnakumar S. R. Menon, Role of surface termination in the metal-insulator transition of V2O3(0001) ultrathin films, ACS Appl. Mater. Interfaces 13,20779 (2021).
  13. Bibhuti Bhusan Jena, Suman Mandal, and Krishnakumar S. R. Menon, Antiferromagnetism of CoO-NiO bilayers studied by XMLD spectroscopy, J. Phys. D: Appl. Phys. 54, 185001 (2021).
  14. Suman Mandal, Tomáš Skála and Krishnakumar S. R. Menon, Electronic structure and intrinsic dielectric polarization of defect-engineered rutile TiO2, J. Mater. Chem. C 9, 595 (2021).
  15. Sukanta Barman, Asish K. Kundu and Krishnakumar S. R. Menon, Influence of finite size and image charge screening on the antiferromagnetic ordering of CoO ultrathin films, J. Magn. Magn. Mater. 515, 167292 (2020).
  16. Suvankar Chakraborty and Krishnakumar S. R. Menon, Growth and surface structural study of tin oxide films on Ag(001), Vacuum 160, 371 (2019).
  17. Jayanta Das, Sananda Biswas, Kanchan Ulman, Rajdeep Banerjee, Gaurav Gautam, Asish K. Kundu, Shobhana Narasimhan, and Krishnakumar S. R. Menon, Electronic structure of a buried two-dimensional antiferromagnetic layer: Experimental and theoretical investigation of Ag/Cr/Ag(001), Phys. Rev. B 98, 075137(2018).
  18. Asish K. Kundu, Sukanta Barman and Krishnakumar S. R. Menon, Evolution of surface antiferromagnetic Neel temperature with film coverage in ultrathin MnO films on Ag(001), J. Magn. Magn. Mater. 466, 186 (2018).
  19. Asish K. Kundu and Krishnakumar S. R. Menon, Structural and electronic properties of V/Ag(0 0 1) films: Effects of substrate temperature and film thickness, Appl. Surf. Sci. 456, 845 (2018).
  20. Sukanta Barman, Asish K. Kundu and Krishnakumar S. R. Menon, Growth and coverage dependent electronic structure of MgO on Ag(001), Surf. Sci. 677, 60 (2018).
  21. Suvankar Chakraborty and Krishnakumar S. R. Menon, Growth, structural evolution and electronic properties of ultrathin films of Sn on W(110), Surf. Sci. 674, 79 (2018).
  22. Sukanta Barman and Krishnakumar S. R. Menon, Growth optimization and electronic structure of ultrathin CoO films on Ag(001): A LEED and photoemission study, J. Cryst. Growth 487, 28 (2018).
  23.  Jayanta Das and Krishnakumar S. R. Menon, On the evolution of antiferromagnetic nanodomains in NiO thin films: A LEEM study, J. Magn. Magn. Mater. 449, 415 (2018).
  24. Asish K. Kundu, Sukanta Barman and Krishnakumar S. R. Menon, Effects of film thickness and magnetism on the electronic structure of MnO films, Phys. Rev. B 96, 195116 (2017).
  25. N. Vijay Prakash Chaudhary, Sagar Sarkar, Neetika Sharma, Asish K. Kundu, Krishnakumar S. R. Menon, A. Das, Priya Mahadevan, and A. Venimadhav, Doping a dipole into an incipient ferroelectric: Route to relaxor ferroelectrics, Phys. Rev. B 96, 024107 (2017).
  26. Asish K. Kundu, Sukanta Barman and Krishnakumar S. R. Menon, Stabilization of polar Mn3O4(001) film on Ag(001): Interplay between kinetic and structural stability, Surf. Sci. 664, 207 (2017).
  27. Asish K. Kundu and Krishnakumar S. R. Menon, Thickness-dependent evolution of structure, electronic structure, and metal-insulator transition in ultrathin V2O3(0001) films on Ag(001), Surf. Sci. 659, 43 (2017).
  28. S. Mandal, S. Pal, Asish K. Kundu, Krishnakumar S. R. Menon, A. Hazarika, Maxime Rioult and Rachid Belkhou, Microscopic Origin of Colossal Permittivity in Donor-Acceptor (Nb, In) Co-Doped Rutile TiO2, Appl. Phys. Lett. 109, 092906 (2016).
  29. Jayanta Das, Krishnakumar S. R. Menon and Asish. K. Kundu, Experimental Evidence of 2D Antiferromagnetism in Epitaxial Chromium Overlayer, Adv. Sci. Lett. 22, 232 (2016).
  30. Suvankar Chakraborty and Krishnakumar S. R. Menon, Growth and structural evolution of Sn on Ag(001): Epitaxial monolayer to thick alloy film, J. Vac. Sci. Technol., A, 34, 041513 (2016).
  31. Asish. K. Kundu and Krishnakumar S. R. Menon, Growth and characterization of ultrathin epitaxial MnO film on Ag(001), J. Cryst. Growth 446, 85 (2016). 
  32. S. Mandal, Jayanta Das and Krishnakumar S. R. Menon, Surface magnetism of NiO investigated by magnetic Spectromicroscopies, J. Electron Spectrosc. Relat. Phenom., 208, 51 (2016).
  33. Suvankar Chakraborty and Krishnakumar S. R. Menon, LEED and Photoemission study of growth and structural evolution of Sn on Ag(001), Vacuum 125, 106 (2016).
  34. Jayanta Das and Krishnakumar S. R. Menon, Effects of surface non-stoichiometry on the electronic structure of ultrathin NiO(001) film, Appl. Surf. Sci. 359, 61 (2015).
  35. Jayanta Das and Krishnakumar S. R. Menon, A revisit to ultrathin NiO(001) film: LEED and valence band photoemission studies, J. Electron Spectrosc. Relat. Phenom. 203, 71 (2015). 
  36. P. Mishra, H. Lohani, Asish K. Kundu, R. Patel, G. K. Solanki, Krishnakumar S. R. Menon and B. R. Sekhar, Electronic structure of germanium selenide investigated using ultra-violet photoelectron spectroscopy, Semicond. Sci. Technol. 30, 075001 (2015).
  37. Jayanta Das, Sananda Biswas, Asish K. Kundu, Shobhana Narasimhan, and Krishnakumar S. R. Menon, Structure of Cr monolayer on Ag(001): A buried two-dimensional c(2×2) antiferromagnet, Phys. Rev. B 91, 125435 (2015). 
  38. S. K. Mahatha and Krishnakumar S. R. Menon, Growth and photoemission spectroscopic studies of ultrathin noble metal films on graphite, Pramana – J. Phys., 84, 1011 (2015). 
  39. Jayanta Das, Asish K. Kundu and Krishnakumar S. R. Menon, Growth of antiferromagnetically ordered Cr monolayer on Ag(100), Vacuum 112, 5 (2015). 
  40. S. Mandal, R. Belkhou,  F. Maccherozzi and Krishnakumar S. R. Menon, Magnetic skin layer of NiO(100) probed by polarization-dependent spectromicroscopy, Appl. Phys. Lett. 104, 242414 (2014). 
  41. Subarna Mitra, Suvankar Chakraborty, Krishnakumar S. R. Menon, Specular X-ray reflectivity study of interfacial SiO2 layer in thermally annealed NiO/Si assembly, Appl. Phys. A 117, 1185 (2014). 
  42. S. K. Mahatha and Krishnakumar S. R. Menon, Near-freely standing Au quantum well states on MoS2(0001) surface, J. Electron Spectrosc. Relat. Phenom. 193, 43 (2014). 
  43. Subarna Mitra, Suvankar Chakraborty, Krishnakumar S. R. Menon, Study of anti-clockwise bipolar resistive switching in Ag/NiO/ITO heterojunction assembly, Appl. Phys. A 115, 1173 (2014). 
  44. Suvankar Chakraborty, Subarna Mitra, Krishnakumar S. R. Menon,  Temperature dependent thickness change in NiO/Si thin film system, AIP Conf. Proc. 1536, 499 (2013); doi: 10.1063/1.4810319. 
  45. Jayanta Das and Krishnakumar S. R. Menon, A high resolution microscopic approach for imaging antiferromagnetic nanodomains of NiO thin film, AIP Conf. Proc. 1536, 175 (2013); doi: 10.1063/1.4810157. 
  46. S. K. Mahatha and Krishnakumar S. R. Menon, Quantum well states in Ag thin films on MoS2(0001) surfaces, J. Phys.: Condens. Matter 25, 115501 (2013). 
  47. S. K. Mahatha, K. D. Patel and Krishnakumar S. R. Menon, Electronic structure investigation of MoS2 and MoSe2 using angle-resolved photoemission spectroscopy and ab initio band structure studies, J. Phys.: Condens. Matter 24, 475504 (2012). 
  48. S. K. Mahatha and Krishnakumar S. R. Menon, Polarization dependence of angle-resolved photoemission spectroscopy of graphite, Surf. Sci. 606, 1705 (2012). 
  49. S. K. Mahatha and Krishnakumar S. R. Menon, Inhomogeneous band bending on MoS2(0001) by surface steps and dislocations, J. Phys.: Condens. Matter 24, 305502 (2012). 
  50. S. K. Mahatha and Krishnakumar S. R. Menon, Unoccupied electronic structure of graphite probed by ARPES, AIP Conf. Proc. 1447, 837 (2012). 
  51. S. Mandal and Krishnakumar S. R. Menon, Morphology induced magnetic instabilities on oxide antiferromagnetic surfaces, Eur. Phys. J. B, 85, 2 (2012). 
  52. S. Mandal, Krishnakumar S. R. Menon, S. K. Mahatha and S. Banerjee, Finite size versus surface effects on magnetic properties of antiferromagnetic particles, Appl. Phys. Lett. 99, 232507 (2011). 
  53. Krishnakumar S. R. Menon, S. Mandal, J. Das, T. O. Mentes, M. A. Nino, A. Locatelli and R. Belkhou, Surface antiferromagnetic domain imaging using low-energy unpolarized electrons, Phys. Rev. B 84, 132402 (2011).
  54. S. K. Mahatha, Krishnakumar S. R. Menon and T. Balasubramanian, Unoccupied electronic structure of graphite probed by angle-resolved photoemission spectroscopy, Phys. Rev. B 84, 113106 (2011).
  55. S. Mandal, Krishnakumar S. R. Menon, F. Maccherozzi and R. Belkhou, Surface spin orientation of NiO(100) and interfacial coupling of Fe/NiO(100) revisited with soft x-ray spectromicroscopy, Europhys. Lett. 95, 27006 (2011).
  56. S. Mandal, Krishnakumar S. R. Menon, F. Maccherozzi and R. Belkhou, Microscopic investigation of surface and interfacial magnetic domain structure of Fe-NiO(100) system, J. Phys. D: Appl. Phys. 44, 255003 (2011).
  57. S. K. Mahatha and Krishnakumar S. R. Menon, Angle-resolved Photoemission Spectroscopic (ARPES) Facility for Surface Electronic Structure Characterization, Current Science 98, 759 (2010).
  58. S. Mandal, S. Banerjee, and Krishnakumar S. R. Menon, Core-shell model of the vacancy concentration and magnetic behavior for antiferromagnetic nanoparticles, Phys. Rev. B 80, 214420 (2009).
  59. S. Mandal, Krishnakumar S. R. Menon, F. Maccherozzi and R. Belkhou, Strain Induced Non-equilibrium Magnetoelastic Domain Structure and Spin Reorientation on NiO(100), Phys. Rev. B 80, 184408 (2009).
  60. J. Honolka, T. Y. Lee, K. Kuhnke, D. Repetto, V. Sessi, P. Wahl, A. Buchsbaum, P. Varga, S. Gardonio, C. Carbone, S. R. Krishnakumar, P. Gambardella, M. Komelj, R. Singer, M. Fähnle, K. Fauth, G. Schütz, A. Enders and K. Kern, Complex magnetic phase in submonolayer Fe stripes on Pt(997), Phys. Rev. B 79, 104430 (2009). 
  61. S. S. Gupta, P. Mahadevan, S. Mandal, S. R. Krishnakumar, and D. D. Sarma, Theoretical Investigation Of The Spin Reorientation Transition In Epitaxial Films Of NiO, AIP Conf. Proc. 1003, 28 (2008).
  62. Sugata Ray, Priya Mahadevan, S. R. Krishnakumar, S. Mandal, Carlos Seiti Kuroda, T. Sasaki, Tomoyasu Taniyama, and Mitsuru Itoh, High temperature ferromagnetism in single crystal dilute magnetic oxide: Intrinsic disorder and magnetism in Fe-doped BaTiO3, Phys. Rev. B 77, 104416 (2008). 
  63. J. Honolka, K. Kuhnke, L. Vitali, A. Enders, K. Kern, S. Gardonio, C. Carbone, S. R. Krishnakumar, P. Bencok, S. Stepanow, and P. Gambardella, Absence of local magnetic moments in Ru and Rh impurities and clusters on Ag(100) and Pt(997), Phys. Rev. B 76, 144412 (2007). 
  64. S. Banerjee, P. Sujatha Devi, D. Topwal, S. Mandal, and Krishnakumar Menon, Enhanced Ionic Conductivity in Ce0.8Sm0.2O1.9: Unique Effect of Calcium Co-doping, Adv. Funct. Mater. 17, 2847 (2007).
  65. S. R. Krishnakumar, M. Liberati, C. Grazioli, M. Veronese, S. Turchini, P. Luches, S. Valeri and C. Carbone, Magnetic linear dichroism studies of in-situ grown NiO thin films, J. Magn. Magn. Mater. 310, 8 (2007).
  66. A microspectroscopic study of the electronic homogeneity of ordered and disordered Sr2FeMoO6, J. Chem. Sci., 118, 87 (2006).
  67. C. Grazioli, Dario Alfè, S. R. Krishnakumar, Subhra Sen Gupta, M. Veronese, S. Turchini, Nicola Bonini, Andrea Dal Corso, D. D. Sarma, Stefano Baroni, and C. Carbone, Spin-Flop Ordering from Frustrated Ferro- and Antiferromagnetic Interactions: A Combined Theoretical and Experimental Study of a Mn/Fe(100) Monolayer, Phys. Rev. Lett. 95, 117201 (2005).
  68. P. Gambardella, H. Brune, S. S. Dhesi, P. Bencok, S. R. Krishnakumar, S. Gardonio, M. Veronese, C. Grazioli and C. Carbone, Paramagnetic Mn impurities on Ge and GaAs Surface, Phys. Rev. B 72, 045337 (2005).
  69. D. D. Sarma, Dinesh Topwal, Manju U., S. R. Krishnakumar, M. Bertolo, S. La Rosa, G. Cautero, T. Y. Koo, P. A. Sharma, S-W. Cheong, and A. Fujimori, Direct observation of large electronic domains with memory effect in doped manganites, Phys. Rev. Lett. 93, 097202 (2004).
  70. Manju U, S. R. Krishnakumar, S. Ray, S. Raj, M. Onoda, C. Carbone and D. D. Sarma, Electron spectroscopic investigation of metal-insulator transition in Ce1-xSrxTiO3, Proc. Ind. Acad. Sci. (Chem. Sci.) 115, 491 (2003).
  71. S. R. Krishnakumar and D. D. Sarma,  X-ray photoemission study of NiS2-xSex (x = 0.0 - 1.2), Phys. Rev. B 68, 155110 (2003).
  72. D. D. Sarma, S. R. Krishnakumar, E. Weschke, C. Schüßler-Langeheine, C. Mazumdar, L. Kilian, G. Kaindl, K. Mamiya, S.-I. Fujimori, A. Fujimori and T. Miyadai, Metal-insulator crossover behavior at the surface of NiS2, Phys. Rev. B 67, 155112 (2003).
  73. S. R. Krishnakumar, N. Shanthi, and D. D. Sarma, Electronic structure of millerite NiS, Phys. Rev. B 66, 115105 (2002).
  74. S. R. Krishnakumar, T. Saha-Dasgupta, N. Shanthi, Priya Mahadevan, and D. D. Sarma, Electronic structure of and covalency driven metal-insulator transition in BaCo1-xNixS2, Phys. Rev. B 63, 045111 (2001).
  75. S. R. Krishnakumar, N. Shanthi, Priya Mahadevan, and D. D. Sarma, Electronic structure of NiS1-xSex, Phys. Rev. B 61, 16370 (2000); S. R. Krishnakumar, N. Shanthi, Priya Mahadevan, and D. D. Sarma, Erratum: Electronic structure of NiS1-xSex, Phys. Rev. B 62, 10570 (2000).
  76. S. Haffner, M. Knupfer, S. R. Krishnakumar, K. Ruck, G. Krabbes, M. S. Golden, J. Fink and R. L. Johnson, Analysis of  the first electron-removal states of Ba2Cu3O4Cl2 using polarization dependent angle-resolved photoelectron spectroscopy, Eur. Phys. J. B 14, 251-261, (2000).
  77. S. Chaudhary, V. S. Kumar, S. B. Roy, P. Chaddah, S. R. Krishnakumar, V. G. Sathe, A. Kumar and D. D. Sarma, Magnetocaloric effect in La1-xSrxCoO3 (0.05 < x < 0.4), J. Magn. Magn. Mater. 202, 47 (1999).
  78. D. D. Sarma, S. R. Krishnakumar, N. Chandrasekharan, E. Weschke, C. Schüßler-Langeheine, L. Kilian and G. Kaindl, Electronic structure of NiS1-xSex across the phase transition, Phys. Rev. Lett. 80, 1284 (1998).
  79. D. D. Sarma, A. Chainani, S. R. Krishnakumar, E. Vescovo,C. Carbone, W. Eberhardt, O. Rader, Ch. Jung, Ch. Hellwig, W. Gudat, H. Srikanth and A. K. Raychaudhuri, Disorder effects in electronic structure of substituted transition metal compounds, Phys. Rev. Lett. 80, 4004 (1998).
  80. D. D. Sarma, M. Pedio, M. Capozi, A. Girycki, N. Chandrasekharan, N. Shanthi, S. R. Krishnakumar, C. Ottaviani, C. Quaresima and P. Perfetti, Unoccupied electronic states in NiS2-xSex across the metal-insulator transition, Phys. Rev. B 57, 6984 (1998).
  81. K. Mamiya, T. Mizokawa, A. Fujimori, T. Miyadai, N. Chandrasekharan, S. R. Krishnakumar, D. D. Sarma, H. Takahashi, N. Mori and S. Suga, Photoemission study of the metal-insulator transition in NiS2-xSex, Phys. Rev. B 58, 9611 (1998).
  82. K. Mamiya, T. Mizokawa, A. Fujimori, H. Takahashi, N. Mori, T. Miyadai, S. Suga, N. Chandrasekharan, S. R. Krishnakumar and D. D. Sarma, Photoemission study of pyrite-type transition-metal chalcogenides MS2-xSex, Physica B 237-238, 390 (1997).
  83. D. D. Sarma, N. Shanthi, S. R. Krishnakumar, T. Saitoh, T. Mizokawa, A. Sekiyama, K. Kobayashi, A. Fujimori, E. Weschke, R. Meier, G. Kaindl, Y. Takeda and M. Takano, Temperature dependent spectral weight transfer and metal-insulator transition in hole-doped LaMnO3, Phys. Rev. B 53, 6873 (1996).

 

 

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