Quantum Melting of Spin Ice: Emergent Cooperative Quadrupole and Chirality - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: A quantum melting of the spin ice is proposed for pyrochlore-lattice magnetsPr$ 2TM 2$O$ 7$ $TM=$Ir, Zr, and Sn. The quantum superexchange Hamiltonianhaving a nontrivial magnetic anisotropy is derived in the basis of atomicnon-Kramers magnetic doublets. The ground states exhibit a cooperativeferroquadrupole and pseudospin chirality, forming a magnetic analog of smecticliquid crystals. Our theory accounts for dynamic spin-ice behaviorsexperimentally observed in Pr$ 2TM 2$O$ 7$.



Autor: Shigeki Onoda, Yoichi Tanaka

Fuente: https://arxiv.org/







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