Welcome to our group...

 
Thank you for visiting our webpage. We are the condensed matter physics group in the Department of Physics at Indian Institute of Technology Tirupati (IITT), working mainly on the strongly correlated electron system (magnetism and superconductivity), one of the most diverse fields of research in recent days.
 

Research interests

We are interested in the following topics:
 
  • strongly correlated electron phenomena, e.g., spin-orbit coupled iridates, triangular and kagome spin-liquid, Mott metal-insulator transition, superconductivity and magnetism by performing experiments at extreme conditions like very low temperatures, high magnetic fields and high pressures.
  • Theoretical modelling: First-principles density functional theory (DFT) for electronic band structure calculations.
 

Selected publications

  1. Neutron diffraction evidence for local spin canting, weak Jahn-Teller distortion, and magnetic compensation in TixMn1-xCo2O4 spinel, P. Pramanik, D. C. Joshi, M. Reehuis, A. Hoser, J. U. Hoffmann, R. S. Manna, T. Sarkar, and S. Thota, J. Phys.: Condens. Matter 32, 245801 (2020) (cited 2 times).

  2. Anomalous charge ordering in pressure-tuned iron oxide Fe4O5, S. V. Ovsyannikov, M. Bykov, E. Bykova, K. Glazyrin, R. S. Manna et al., Nature communications 9, 4142 (2018) (cited 6 times).

  3. Pressure dependence of spin canting in ammonium metal formate antiferromagnets, E. C.*, R. S. Manna* et al., Phys. Chem. Chem. Phys. 20, 24465 (2018), *corresponding author (cited 3 timess).

  4. Relaxation dynamics in the one-dimensional organic charge-transfer salt δ-(EDT-TTF-CONMe2)2Br, J. K. H. Fischer, P. Lunkenheimer, C. Leva, S. M. Winter, M. Lang, C. Mézière, P. Batail, A. Loidl, and R. S. Manna, Phys. Rev. B  97, 235156 (2018)        (cited 1 time).

  5. Breakdown of magnetic order in the pressurized Kitaev iridate β-Li2IrO3, M. M.$, R. S. Manna$ et al., Phys. Rev. Lett. 120, 237202 (2018) $ = equal contribution (cited 45 times).

  6. Low-temperature lattice effects in the spin-liquid candidate k-(BEDT-TTF)2Cu2(CN)3, R. S. Manna et al., Crystals 8, 87 (2018) (cited 4 times).

  7. Breakdown of Hooke’s law of elasticity at the Mott critical endpoint in an organic conductor, E. G., M. G., R. S. Manna et al., Science Advances 2 , e1601646 (2016) (cited 29 times).

  8. Lattice strain accompanying the colossal magnetoresistance effect in EuB6, R. S. Manna et al., Phys. Rev. Lett. 113, 067202 (2014) (cited 12 times).

  9. Lattice effects in the quasi-two-dimensional valence-bond-solid Mott insulator EtMe3P[Pd(dmit)2]2, R. S. Manna et al., Phys. Rev. B 89, 045113 (2014) (cited 5 times).

  10. High-resolution thermal expansion measurements under helium-gas pressure, R. S. Manna et al., Rev. Sci. Instrum. 83, 085111 (2012) (cited 18 times).

  11. Lattice effects and entropy release at the low-temperature phase transition in the spin-liquid candidate κ-(ET)2Cu2(CN)3, R. S. Manna et al., Phys. Rev. Lett. 104, 016403 (2010) (cited 113 times).

  12. Magnetic properties of CoFe2O4 synthesized by solid state, citrate precursor and polymerized complex methods: a comparative study, P. V., R. S. Manna, D. Banerjee, M. R. Varma, K. G. Suresh, and A. K. Nigam, J. Alloys Compd. 453, 298 (2008) (cited 118 times).

Recent news

06/04/2020 09:40
SERB calls for proposal related to NPDF. Interested candidates may apply.
06/04/2020 09:30
Candidates are having interest in the field of "Experimental Condensed Matter Physics" are...
18/03/2020 13:00
Neutron diffraction evidence for local spin canting, weak Jahn-Teller distortion, and magnetic...