Abstract
The properties of a system of bosons interacting through a two body potential composed of a hard repulsive core followed by an attractive square well and having density of the order of that of liquid4He at theλ-point have been studied. The system is found to have a peculiar behaviour around 1 K and we assert that it may have undergone another phase transition around 1 K. Calculations on the effective mass show that them */m values lie between 2 and 9 so that the interacting bosons may have a transition temperature below 1 K. We have also plottedE k vs.k graph for temperatures below 1 K.
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The authors are thankful to Prof. F. C.Auluck, Dr. N. R.Ranganathan, Dr. H. G.Venkatesh and Dr. A. N.Phukan for helpful discussion. Authors thanks are due to Prof. B. R.Seth, D.Sc., F.N.A., Director, B.I.T., Mesra for constant encouragement. The authors thankfully acknowledge the financial assistance provided by the Indian National Science Academy, New Delhi.
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Khanna, K.M., Das, B.K. Very low temperature properties of bosons with repulsive core and attractive tails. Czech J Phys 23, 1159–1171 (1973). https://doi.org/10.1007/BF01591197
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DOI: https://doi.org/10.1007/BF01591197