Correction to: Scientific Reports https://doi.org/10.1038/s41598-019-53701-5, published online 26 November 2019

The Acknowledgements section in this Article is incorrect.

“Author gratefully acknowledges the discussion with Prof. G. Kar (ISI, Kolkata) and the support from the project DST/ICPS/QuST/Theme-12019/4.”

should read:

“Author gratefully acknowledges the discussion with Prof. G. Kar (ISI, Kolkata) and the support from the Ramanujan Fellowship Research Grant (No. SB/S2/RJN-083/2014)”.