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Faculty Profile ::

 

Venkata Rama Rao

Dr. Venkata Rama Rao Medicherla
Ph.D. (UGC-DAE CSR, Indore, India
Asst. Professor of Physics

Venkata Rama Rao M. joined the Institute in August, 2009

Contact Address

Office

Institute of Technical Education & Research
Jagamohan Nagar, Khandagiri,
Bhubaneswar – 751030, India.
Phone : +91-674-2350181, 2351539. 2351777, 2351419
Fax : +91-674-2351880/2351217
Web: http://iter.ac.in/physics.php

   
Residence

House No:30/17, Gajapati Nagar, Bhubaneswar – 751005 , India

   
Phone (office) +91-674-2350181, 2351539. 2351777, 2351419-104
   
E-mail Vramarao1@yahoo.com , vramarao1@yhoo.com

Research Interest

   
  •  Physics of highly correlated and Kondo systems
•  Physics of surfaces and interfaces
•  Synthesis and Electronic structure of nano structures
•  Nano-mechanics

Teaching (UG/PG)

   
 

•  Engineering Physics (UG)

Research and Publications

   
 

Papers in refereed journals (international journals) (33)

•  Formation of Patterns and Scaling Properties of Ta surfaces after low energy ion beam irradiation S. Majumder, V.R.R. Medicherla, D. Paramanik, V. Solanki, Indrani Mishra and S. Varma, communicated to Radiation Effects and Defects in Solids (2010)

•  Ni doped ZnO:  studies on structural and magnetic properties J. Mohapatra, D. K. Mishra, S. K. Kamilla1, V. R. R. Medicherla, D. M. Phase, V. Berma and S. K. Singh, accepted for publication Physica Status Solidi B (2010)

•  Kondo resonance in a magnetically ordered compound Ce2RhSi3: Photoemission spectroscopy and ab initio band structure calculations Swapnil Patil, V. R. R. Medicherla, R. S. Singh, Sudhir K. Pandey, E. V. Sampathkumaran, and Kalobaran Maiti, B 82, 104428 (2010).

•  Importance of Co 3d electron correlation in a Ce-based Kondo lattice, Ce2CoSi3
Swapnil Patil, Sudhir Pandey, V.R.R. Medicherla, R. S. Singh, R. Bindu, E. V. Sampathkumaran, and Kalobaran Maiti, accepted for publication in Phys. Rev. B (2010).

•  Importance of conduction electron correlation in a Kondo lattice Ce2CoSi3 Swapnil Patil, Sudhir K Pandey, V R R Medicherla, R S Singh, R Bindu, E V Sampathkumaran and Kalobaran Maiti, J. Phys. Condens. Matt. 22, 225602 (2010).

•  Formation of self organized Ta nano-structures by argon ion sputtering of Ta foil: XPS and AFM study V.R.R. Medicherla, S. Majumder, D. Paramanik and Shikha Varma, J. Electron Spectr. Relat. Phenomen. 180, 1(2010).

•  Electronic structure of PdAg(100) ordered surface alloys using Synchrotron Radiation
V.R.R. Medicherla and W. Drube,  Appl. Surf. Sci.256, 376 (2009).8. Evidence for strong 5d electron correlations in the pyrochlore Y2Ir2O7 studied using high-resolution photoemission spectroscopy R. S. Singh, V. R. R. Medicherla, Kalobaran Maiti, and E. V. Sampathkumaran, Phys. Rev. B 77, 201102(R) 2008

•  Electronic structure of PrCoO3 and its temperature evolution S.K. Pandey, Swapnil Patil, V.R.R. Medicherla, R.S. Singh and Kalobaran Maiti, Phys. Rev. B 77, 115137 (2008)

•  Electronic Structure of BaPbO3 and Ba2PbO4 V.R.R. Medicherla, T. Shripathi and N.P. Lalla, J. Phys: Cond. Matter 20, 035219 (2008)

•  Role of electron correlation and long range magnetic order in the electronic structure of Ca(Sr)RuO3 Ravi Shankar Singh, V.R.R. Medicherla and Kalobaran Maiti, Physica B: Condens. Matt. 403, 1398 (2008)

•  Investigation of the spin state of Co in LaCoO3 at room temperature S.K. Pandey, Ashwani Kumar, S. Patil, V.R.R. Medicherla, R.S. Singh, K. Maiti, D. Prabhakaran, A.T. Boothroyd, and A.V. Pimpale, Phys. ReV. B 77, 045123 (2008).

•  Revelation of the role of impurities and conduction electron density in the high resolution photoemission study of ferromagnetic hexaborides Kalobaran Maiti, V.R.R. Medicherla, Swapnil Patil, Ravi Shankar Sing, Phys. Rev. Lett. 99,266401 (2007)

•  Role of long range ferromagnetic order in the electronic structure of Sr1-xCaxRuO3 Ravi Shankar Singh, V.R.R. Medicherla, Kalobaran Maiti, Appl. Phys. Lett. 91, 132503 (2007)

•  Evolution of a band insulating phase from a correlated metallic phase Kalobaran Maiti, Ravi Shankar Singh, V.R.R. Medicherla, Phys. Rev. B 76, 165128 (2007)

•  Origin of ground state anomaly in LaB6 at low temperatures V.R.R. Medicherla, Swapnil Patil, Ravi Shankar Singh and Kalobaran Maiti, Appl. Phys. Lett. 90,062507(2007).

•  KLL Auger resonant Raman transition in metallic Cu and Ni L. Kövér, W. Drube, Z. Berényi, I. Cserny, V.R.R. Medicherla, T. Ishii, H. Ikeno and H. Adachi; Surf. Science 601, 1085 (2007).

•  Verification of the core hole clock method using two different time references: Attosecond charge transfer in c(4x2)S/Ru(0001) A. Föhlisch, S. Vijayalakshmi, F. Hennies, W. Wurth, V.R.R. Medicherla, W. Drube, Chem. Phys. Lett. 434, 214 (2007).

•  Evidence of particle hole asymmetry and role of phonons in non-Fermi liquid behavior: A high-resolution photoemission study of ruthenates Kalobaran Maiti, Ravi Shankar Singh, and V.R.R. Medicherla, Eur. Phys. Lett. 78, 17002 (2007)

•  Initial-and final-state excitations in KL23L23 Auger spectra of Cu and Ni metals, induced near threshold L. Kövér, Z. Berényi, I. Cserny, L. Lugosi, W. Drube, T. Mukoyama, and V.R.R. Medicherla Phys. Rev. B. 73, 195101 (2006).

•  Origin of Charge Density Wave Formation in Insulators from a High Resolution Photoemission Study of BaIrO3 Kalobaran Maiti, Ravi Shankar Singh, V.R.R. Medicherla, S. Rayaprol, and E. V. Sampathkumaran Phys. Rev. Lett., 95, 016404 (2005).

•  High-energy X-ray photoelectron spectroscopy study of MBE grown (Eu, Gd) Te layers
B. A. Orlowski, S. Mickievicius, V. Osonniy, A. J. Nadolny, B. Taliashvili, P. Dziawa, T. Story, R. Medicherla, W. Drube NIMB, 238,346 (2005).

•  Photoemission study of EuS/PbS electronic structure B.A.Orlowski, E.Guziewicz, B.J.Kowalski, T.Story, S.Mickevicius, A.Y.Sipatov, M.Chernyshova, I.Demchenko, N.Barrett, M.Taniguchi,A.Kimura, H.Sato, C.A.Sebenne, J.P.Lacharm, R.Medicherla, W. Drube
J. Alloys and Compounds, 362, 198 (2004).

•  Final state contribution to the Si 2p binding energy shift in SiO2/Si(100) Th.Eickhoff, V. Medicherla and W.Drube J. Electron Spectroscop. and Relat. Phenom. 137-140, 85 (2004).

•  Photoemission study of EuS layer buried in PbS B.A.Orlowski, S.Mickevicius, M.Chernyshova, I.Demchenko, A.Y.Sipatov, T.Story, V. Medicherla, and W.Drube J. Electron Spectroscop. and Relat. Phenomen. 137-140, 763 (2004).

•  Electronic structure of ARuO3 (A = Ca, Sr and Ba) compounds M. V. Rama Rao, V. G. Sathe, D. Sorna Durai, B. Panigrahi and T. Shripathi J. Physics and Chemistry of Solids 62, 797 (2001)

•  Metal to insulator transition in Sr2RuxIr1-xO4 M. V. Rama Rao, V. G. Sathe, D. Sorna Durai, B. Panigrahi and T. Shripathi; J. Physics and Chemistry of Solids, 61, 1989 (2000).

•  Quantum size EFfects in CuO nanoparticles Kavita Bargohain, J. B. Singh, M. V. Rama Rao, T. Shripathi and Shailaja Mahamuni Phys. ReV. B 61(16), 11093 (2000).

•  Microstructural study of Iron Nitride thin film deposited by Ion beam sputtering Mukul Gupta, Ajay Gupta, S. M. Chaudhari, D. M. Phase, V. Ganesan M. V. Rama Rao, T. Shripathi and B. A.Dasannacharya; Vacuum 60, 395 (2001).

•  Photoemission studies on Sm0.5Ca0.5MnO3 V. Sivasubramanian, M. V. Rama Rao, T. Shripathi, V. Subramanian and V. R. K. Murthy, Mat. Science and Engg. B77, 128 (2000).

•  Synthesis of TiN, VN, and CrN from Ammonolysis of TiS2, VS2, and Cr2S3 P. Subramanya Herle, M. S. Hegde, N. Y. Vasanthacharya, Sam Philip, M. V. Rama Rao and T. Shripathi; J. Solid State Chem. 134, 120 (1997).

•  Photoelectron spectroscopic study of X-ray induced reduction of CeO2 M. V. Rama Rao and T. Shripathi, J. Electron Spectrosc. and Related phenomen. 87, 121(1997).

•  Core Level Spectroscopy in Ban+1PbnO3n+1 series M. V. Rama Rao and T. Shripathi, J. Electron Spectrosc. and Related phenomen., 78, 159(1996).

Papers in international conferences/meetings(13)

•  Surface Structure of PdAg(100)alloys: A Synchrotron Radiation Study V.R.R. Medicherla CT-CMP 2010, NISER, Bhubaneswar 2010

•  Electronic structure of PdAg(100) ordered surface alloys using Synchrotron Radiation
V.R.R. Medicherla and W. Drube (presented in International conference on Physics at surfaces and Interfaces, Puri, India (23-27th Feb. 2009)

•  Ripple formation on Ta foil by argon ion bombardment V.R.R. Medicherla, S. Majumder and S. Varma (presented in International conference on Physics at surfaces and Interfaces, Puri, India (23-27th Feb. 2009)

•  Tantalum nanostructure formation by ion sputtering V.R.R. Medicherla, D. Paramanik, S. Majumdar, S.R. Sahoo, S.K. Choudhury and Shikha Varma INDO-US workshop on science and technology at the nano-bio interface, Feb 19-22, 2008, Bhubaneswar, India

•  Hard X-ray Photoemission on Ferromagnetic MnAs Clusters in a GaAs Matrix B. Schmid, V.N. Strocov, V.R.R. Medicherla, W. Drube, P.J. Klar, W. Heimbrodt, W. Stolz, and R .Claessen; HASYLAB Annual Report 2004, Pt. 1, 41 (2004)

•  Resonant KLL Auger Spectra photoexcited from Fe and Co metals L. Kover, W. Drube, Z. Berenyi, I. Cserny, V. R. R. Medicherla HASYLAB Annual Report 2003, Pt. 1, 423 (2004).

•  Core hole clock spectroscopy at the Sulphur K-edge to determine ultrafast charge transfer in c(4x2)S/Ru(0001) A. Fohlisch, S. Vijayalakshmi, F. Hennies, F., Wurth, W, V. R. R. Medicherla, W. Drube ; HASYLAB Annual Report 2003, Pt. 1, 727 (2004).

•  XPS study of Ta2O5 growth on Si(100) V. R. R. Medicherla and W. Drube; HASYLAB Annual Report 2003, Pt. 1, 815 (2004)

•  Energy dependence of the electron shake up probability near K-shell photoionization threshold in X-ray absorption of 3d transition metals; L. Kövér, Z. Berényi, I. Cserny, L. Lugosi, W. Drube, T. Mukoyama, V. R. R. Medicherla School on Biological Application of Synchrotron and Free Electron Laser Radiation, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary (2003).

•  KLL Auger resonant Raman transition in metallic Cu and Ni L. Kövér, W. Drube., Z. Berényi , I. Cserny, V. R. R. Medicherla, T. Ishii, H. Ikeno, H. Adachi.;  9th International Conference on Electronic Spectroscopy and Structure. ICESS-9. Uppsala, Sweden(2003).

•  Near threshold excitation of KLL Auger satellites from Cu and Ni metals L. Kover, Z.Berenyi, I.Cserny, T.Mukoyama, W.Drube, and V. R. R. Medicherla 9th International Conference on Electronic Spectroscopy and Structure ICESS-9), Uppsala, Sweden (2003).

•  Photoemission study of EuS/PbS electronic structure B.A.Orlowski, E.Guziewicz, B.J.Kowalski, T.Story, S.Mickevicius, A.Y.Sipatov, M.Chernyshova, I.Demchenko, N.Barrett, M.Taniguchi, A.Kimura, H.Sato, C.A.Sebenne, J.P.Lacharm, R. Medicherla, W.Drube
Proc. Symposium on Synchrotron Radiation in Natural Science (ISSRNS 2002), Ustron-Jaszowiec, June ( 2002).

•  XPS and NIXSW study of Ag-Pd surface alloying V. R. R. Medicherla and W. Drube; HASYLAB Annual Report 1, 707 (2002).

Papers in National conferences/symposia (13)

•  Reduction of TiO2 on Si(111) by argon ion sputtering R.R. Mohanta, V.R.R. Medicherla and L. Behera, Orissa Chemical Society (2010), APEXITM, Bhubaneswar

•  High Resolution Photoemission study of LaB6 V.R.R. Medicherla, Swapnil Patil, Ravi Shankar Singh and Kalobaran Maiti; Proc. DAE-SSPS, 51, 613 (2006).

•  Evolution of the electronic structure across the magnetic phase transition in Sr(ca)RuO3;  Ravi Shankar Singh, V.R.R. medicherla and Kalobaran Maiti Proc. DAE-SSPS, 51, 615 (2006).

•  Precursor effect in the superconductivity of MgB2 Swapnil Patil, V.R.R. Medicherla, Ravi Shankar Singh and Kalobaran Maiti; Proc. DAE-SSPS, 51, 617 (2006).

•  Electronic Structure of LaB6 and CaB6 V. R. R. Medicherla, Ravi Shankar Singh, Swapnil Patil and Kalobaran Maiti Proc. DAE-SSPS, 50, 603 (2005).

•  Study of Metal Insulator Transitions in Oxides (Abstract of the Ph.D thesis) M. V. Rama Rao, Proc. DAE SSPS (1999).

•  Microstructural study of Iron Nitride thin film deposited by Ion beam sputtering Mukul Gupta, Ajay Gupta, S. M. Chaudhari, D. M. Phase, V. Ganesan, M. V. Rama Rao, T. Shripathi and B. A. Dasannacharya DAE -BRNS workshop on Thin film Multilayers, BARC, India ( 1999)

•  HeI Photoelectron Spectra of Sr2Ir1-xRuxO4 M. V. Rama Rao and T. Shripathi Proc. DAE SSPS, 112 (1998).

•  XPS Study of Ir (4f) Core level in IrO2 and Sr2Ir1-xRuxO4, M. V. Rama Rao, Sudipta Banerjee and T. Shripathi; Proc. DAE SSPS 40C, 98 (1997).

•  Surface Modification in CeO2 by X-ray irradiation M. V. Rama Rao and T. Shripathi; Proc. DAE SSPS, 39C, 373 (1996).

•  Study of X-ray induced damage in CeO2 using XPS Archana Sharma, M. V. Rama Rao, S. C. Das and T. Shripathi; Proc. DAE SSPS 38C, 96 (1995).

•  High energy heavy ion induced defects in thin Ti films on Si substrates D. K. Awasthi, G. K. Chaudhary, Sunil Pandita, M. V. Rama Rao, T. Shripathi and Ajay Gupta, Proc. DAE SSPS 38C, 232 (1995).

•  X-ray Photoelectron spectroscopic studies of BaxPbOy M. V. Rama Rao, S. C. Das and T. Shripathi; Proc. DAE SSPS 37C, 440 (1994).

Experience (Academic / Industry)

   
 

Teaching Experience:

• Electromagnetic Theory for M.Sc. students of DAVV, Indore (1 semester 2000 batch)

• S
ynchrotron Radiation and its Applications for Ph.D. students of UGC-DAE CSR, Indore (2000 batch)

• Synchrotron Radiation and its Applications for Ph.D. students of UGC-DAE CSR, Indore (2001 batch)

• Physics-I (theory and lab) and Materials Science for B.Tech students of APEXITM, Bhubaneswar (2008-2009)

• Physics-I (theory and lab) and electrical Engineering materials for B.Tech students of ITER (2009 onwards)


• Asst. Professor (Aug. 2009 to Present) Institute of Technical Education and Research, SOA University, Bhubaneswar, India
• Asst. professor (Aug 2008 to Aug. 2009) APEX Institute of Technology and Management, Bhubaneswar
• Sr. Postdoctoral Fellow (May 2007 to May 2008) Institute of Physics, Bhubaneswar, India
• Visiting Fellow (Aug. 2004 to May 2007) Tata Institute of Fundamental Research, Mumbai, India
• Postdoctoral Fellow (June 2001 to June 2004) HASYLAB/DESY, Hamburg, Germany
• Jr. Engr-D (Jan. 1995 to June 2001) UGC-DAE CSR, Indore, India
• JRF/SRF (Aug. 91 to Dec. 94) UGC-DAE CSR, Indore, India

Special Awards and Scholarships

   
 

•  National Merit Scholarship holder from 1983-1988 in India

•  Qualified in Mathematics Olympiad -1988 conducted by Andhra Pradesh Association of Mathematics Teachers (APAMT), India

•  Qualified GATE -1991 (Graduate Aptitude Test in Engineering conducted by Indian Institute of Technology, Madras) with 87.7 percentile

Computer Experience

   
  •  Numerical Methods in Fortran
  • •  LINUX shell scripting
  • •  Installation and running of TB-LMTO band structure calculations

Invited Talks

   
  •  Core disorder broadening in PdAg(100) alloys, Nov. 2010 in TIFR, Mumbai

•  The role of high dielectric oxides in miniaturization of electronic devices: INAE workshop, 2010, ITER, Bhubaneswar

•  High energy photoemission study of Pd/Ag(100) surface alloys (b) Ferromagnetism in Ca(La)B6 in May 2008 at Vander Waals-Zeeman Institute, Amsterdam University, Netherlands

•  Growth and thermal stability of Ta2O5 on Si(100) (b) Surface alloying in Pd/Ag(100) thin films in June 2008 at NPL, New Delhi, India

•  Core level shifts in PdAg(100) surface alloys in May 2006, BARC, Mumbai, India

•  Metal to Insulator transitions in oxides: December 1999, IGCAR, Kalpakkam, India

Oral presentations in conferences

   
  •  Surface Structure of PdAg(100) Alloys: A Synchrotron Radiation Study, CTCMP-2010, NISER, Bhubaneswar
•  Electronic structure of PdAg(100) ordered surface alloys using Synchrotron Radiation, Feb 2009, PSI-2009, Puri

Departmental Talks

   
  •  Ferromagnetism in hexaborides, Feb. 2010, ITER, Bhubaneswar

•  Crystal and Electronic structure of PdAg(100) ordered surface alloys, Feb. 2010 ITER, Bhubaneswar

•  Photoemission studies on some novel materials, May 2008, IOP, Bhubaneswar

•  Ferromagnetism in hexaborides, June 2006, TIFR, Mumbai

•  Pseudogap in LaB6: high resolution photoemission study; June 2005, TIFR, Mumbai

•  High Energy Photoemission study of Ta2O5/Si(100); Aug. 2004, TIFR, Mumbai

•  Electronic structure of ARuO­3 compounds: July 2001, HASYLAB/DESY, Germany

•  Metal Insulator Transitions in Oxides: Aug. 1999, UGC-DAE CSR, Indore

Refeering

   
 

• I am acting as a referee for papers in IOP, UK journals and also in elsewhere journals

Research Projects Undertaken

   
 

Title of the project: Electronic properties of disordered transition metal alloys.
Above project has been sanctioned to me under collaborative research scheme (CRS) by UGC-DAE CSR for 3 years.
Principal Investigator: myself
Objective of the project is to study the effect of disorder on the physical properties of several binary alloys and bring out some general conclusions.

Guidance to Ph. D Students

   
  • Mrs. Rashmirekha Mohanta conducting research work on high dielectric oxides under my guidance for her Ph.D. (joined 2010)


    • Mr. S.K. Parida, Sr. Lecturer, ITER joined with me in 2001 for his Ph.D. He is working on Electronic Properties of binary TM alloys
 
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