Publication Date:
2016-06-28
Description:
Author(s): T. Haku, K. Kimura, Y. Matsumoto, M. Soda, M. Sera, D. Yu, R. A. Mole, T. Takeuchi, S. Nakatsuji, Y. Kono, T. Sakakibara, L.-J. Chang, and T. Masuda This study is motivated by a challenge to the third law of the thermodynamics: how does the degenerated ground state in a textbook example behave in a real compound? At very low temperatures, nature tries to preserve the basic law using small perturbations and a novel quantum state should appear. The authors here study the classic frustrated magnet Ba 3 Yb 2 Zn 5 O 11 , a spin tetrahedron having two-fold degeneracy realized in a breathing pyrochlore lattice. They measure by inelastic neutron scattering the low-energy excitations in order to identify the effective spin Hamiltonian and macroscopic properties at very low temperatures. They demonstrate how the degeneracy of the ground state is lifted and a unique quantum state is selected. [Phys. Rev. B 93, 220407(R)] Published Fri Jun 24, 2016
Keywords:
Magnetism
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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