Argonne National Laboratory

Ramakanta Chapai

Postdoctoral Appointee

Biography

Ramakanta Chapai is a postdoctoral appointee in the Materials Science division at Argonne National Laboratory. He received his undergraduate degree from Tribhuvan University and his M.S. in Physics from Miami University. Ramakanta received his Ph.D. in Physics from Louisiana State University in 2021, where he explored topological properties of several Transition-Metal Pnictides and Chalcogenides through the study of Shubnikov-de Haas (SdH) and de Haas-van Alphen (dHvA) effects. His current research at Argonne National Laboratory is focused primarily on synthesizing novel quantum materials including topological semimetals and superconductors, and characterizing them through the measurement of magnetic, thermal and charge-transport properties. 

 

Selected Publications

  • “Quantum oscillations with angular dependence in PdTe2 single crystals”, R. Chapai, D. E. Graf, J. F. DiTusa, and R. Jin, J. Phys. Condens. Matter 33, 035601 (2020).
  • “Observation of sixfold degenerate fermions in PdSb2”, X. Yáng, T. A. Cochran, R. Chapai, D. Tristant, J-X. Yin, I. Belopolski, Z. Chéng, D. Multer, S. S. Zhang, N. Shumiya, M. Litskevich, Y. Jiang, G. Chang, Q. Zhang, I. Vekhter, W. A. Shelton, R. Jin, S-Y. Xu, and M. Z. Hasan, Phys. Rev. B 101, 201105(R) (2020).
  • “Fermions and bosons in nonsymmorphic PdSb2 with sixfold degeneracy”, R. Chapai, Y. Jia, W. A. Shelton, R. Nepal, M. Saghayezhian, J. F. DiTusa, E. W. Plummer, C. Jin, and R. Jin,  Phys. Rev. B 99, 161110(R) (2019).
  • “Magnetism and associated exchange bias in Ni2-xCoxMn1.4Ga0.6”, R. Chapai and M. Khan, J. Magn. Magn. Mater., 403, 102 (2016).
  • “Topological behavior and Zeeman splitting in trigonal PtBi2-xsingle crystals”, L. Xing, R. Chapai, R. Nepal, and R. Jin, npj Quantum Mater. 5, 10 (2020).
  • “Evidence for topological semimetallicity in a chain-compound TaSe3”, A. U. Saleheen, R. Chapai, L. Xing, R. Nepal, D. Gong, X. Gui, W. Xie, D. P. Young, E.W. Plummer, R. Jin, npj Quantum Mater. 5, 53 (2020).
  • “Thermal transport, magnetism, and quantum oscillations in Weyl semimetal BaMnSb2”, S. Huang, L. Xing, R. Chapai, R. Nepal, and R. Jin, Phys. Rev. Mater. 4, 065001 (2020).
  • “Consequences of magnetic ordering in chiral Mn1/3NbS2”, S. K. Karna, F. Womack, R. Chapai, D.P. Young, M. Marshall, W. Xie, D. Graf, Y. Wu, H.  Cao, L. Schmitt, P.W. Adams, R.  Jin, and J.F. DiTusa. Phys. Rev. B 100, 184413 (2019).
  • “Helical magnetic order and Fermi surface nesting in noncentrosymmetric ScFeGe”, S. Karna, D. Tristant, J. Hebert, G. Cao, R. Chapai, W. Phelan, Qiang Zhang, Yan Wu, C. Dhital, Y. Li, Huibo B. Cao, Wei Tian, C. R. Dela Cruz, Adam A Aczel, O. Zaharko, A. Khasanov, Michael A. McGuire, A. Roy, W. Xie, D. A. Browne, I. Vekhter, V. Meunier, W. A. Shelton, P.W. Adams, P. T. Sprunger, D.P. Young, R. Jin, J. F. DiTusa, Phys. Rev. B 103, 014443 (2021).