Signatures of a Spin-1/2 Cooperative Paramagnet in the Diluted Triangular Lattice of Y₂CuTiO₆

Kundu, S and Hossain, A and S, PK and Das, R and Baenitz, M and Baker, PJ and Orain, J-C and Joshi, DC and Mathieu, R and Mahadevan, P and Pujari, S and Bhattacharjee, S and Mahajan, AV and Sarma, DD (2020) Signatures of a Spin-1/2 Cooperative Paramagnet in the Diluted Triangular Lattice of Y₂CuTiO₆. In: Physical review letters, 125 (11).

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Abstract

We present a combination of thermodynamic and dynamic experimental signatures of a disorder driven dynamic cooperative paramagnet in a 50 site diluted triangular lattice spin-1/2 system: Y₂CuTiO₆. Magnetic ordering and spin freezing are absent down to 50 mK, far below the Curie-Weiss scale (-θCW) of â�¼134â��â��K. We observe scaling collapses of the magnetic field and temperature dependent magnetic heat capacity and magnetization data, respectively, in conformity with expectations from the random singlet physics. Our experiments establish the suppression of any freezing scale, if at all present, by more than 3 orders of magnitude, opening a plethora of interesting possibilities such as disorder stabilized long range quantum entangled ground states.

Item Type:	Journal Article
Publication:	Physical review letters
Publisher:	NLM (Medline)
Additional Information:	Copyright to this article belongs to American Physical Society
Keywords:	article; expectation; freezing; heat; magnetic field; physics
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	26 Nov 2020 10:26
Last Modified:	26 Nov 2020 10:26
URI:	http://eprints.iisc.ac.in/id/eprint/66825

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