Carboxylate-based molecular magnet: One path toward achieving stable quantum correlations at room temperature

¹ Instituto de Física, Universidade Federal Fluminense - Av. Gal. Milton Tavares de Souza s/n, 24210-346 Niterói, Rio de Janeiro, Brazil
² Instituto de Física de São Carlos, Universidade de São Paulo - CP 369, 13560-970, São Carlos, SP, Brazil
³ CICECO, Universidade de Aveiro - 3810-205, Aveiro, Portugal, EU
⁴ Quantum Condensed Matter Division, Oak Ridge National Laboratory - Oak Ridge, TN 37831-6475, USA

^(a) clebsonscruz@yahoo.com.br

Received: 2 February 2016
Accepted: 24 February 2016

Abstract

The control of quantum correlations in solid-state systems by means of material engineering is a broad avenue to be explored, since it makes possible steps toward the limits of quantum mechanics and the design of novel materials with applications on emerging quantum technologies. In this context, this letter explores the potential of molecular magnets to be prototypes of materials for quantum information technology. More precisely, we engineered a material and from its geometric quantum discord we found significant quantum correlations up to 9540 K (even without entanglement); and, in addition, a pure singlet state occupied up to around 80 K (above liquid nitrogen temperature). These results could only be achieved due to the carboxylate group promoting a metal-to-metal huge magnetic interaction.