Unknown

Dataset Information

0

Quantum electric-dipole liquid on a triangular lattice.


ABSTRACT: Geometric frustration and quantum fluctuations may prohibit the formation of long-range ordering even at the lowest temperature, and therefore liquid-like ground states could be expected. A good example is the quantum spin liquid in frustrated magnets. Geometric frustration and quantum fluctuations can happen beyond magnetic systems. Here we propose that quantum electric-dipole liquids, analogues of quantum spin liquids, could emerge in frustrated dielectrics where antiferroelectrically coupled electric dipoles reside on a triangular lattice. The quantum paraelectric hexaferrite BaFe12O19 with geometric frustration represents a promising candidate for the proposed electric-dipole liquid. We present a series of experimental lines of evidence, including dielectric permittivity, heat capacity and thermal conductivity measured down to 66?mK, to reveal the existence of an unusual liquid-like quantum phase in BaFe12O19, characterized by itinerant low-energy excitations with a small gap. The possible quantum liquids of electric dipoles in frustrated dielectrics open up a fresh playground for fundamental physics.

SUBMITTER: Shen SP 

PROVIDER: S-EPMC4743005 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC5904176 | biostudies-literature
| S-EPMC7125098 | biostudies-literature
| S-EPMC11343025 | biostudies-literature
| S-EPMC6561973 | biostudies-literature
| S-EPMC5701036 | biostudies-literature
| S-EPMC7115929 | biostudies-literature
| S-EPMC2780420 | biostudies-literature
| S-EPMC5544701 | biostudies-literature
| S-EPMC4639809 | biostudies-literature
| S-EPMC9907114 | biostudies-literature