J ul 2 02 1 Failure to achieve the J eff = 0 state even in nearly isolated Ir 5 + in Sr 3 NaIrO 6 : are iridates enough for realizing true jj coupling ?

Abhisek Bandyopadhyay, Atasi Chakraborty, Sayantika Bhowal, Vinod Kumar, M. Moretti Sala, A. Efimenko, F. Bert, P. K. Biswas, C. Meneghini, N. Büttgen, I. Dasgupta, T. Saha Dasgupta, A. V. Mahajan, and Sugata Ray School of Materials Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India Department of Physics, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune 411 008, India School of Physical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211, USA Department of Physics, Indian Institute Of Technology Bombay, Powai, Mumbai 400076, India Dipartimento di Fisica, Politecnico di Milano, P.zza Leonardo da Vinci 32, I-20133 Milano, Italy ESRF–The European Synchrotron, 71 Avenue des Martyrs, 38000 Grenoble, France Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405, Orsay,France ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX110QX, United Kingdom Dipartimento di Scienze, Universitá Roma Tre, Via della Vasca Navale, 84 I-00146 Roma, Italy Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany and Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector 3, Saltlake, Kolkata -700106, India