期刊
NATURE PHYSICS
卷 15, 期 10, 页码 1052-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41567-019-0577-6
关键词
-
资金
- US DOE BES [DE-SC0012311, DE-SC0019503, DE-FG02-04ER46105, KC0402010, DE-AC05-00OR22725]
- Robert A. Welch. Foundation [C-1839, C-1818]
- NSF CAREER grant [DMR-1350237]
- National Research Foundation of Korea [NRF-2017K1A3A7A09016303]
- visitor programme at the Center for Quantum Materials Synthesis - Gordon and Betty Moore Foundation's EPiQS initiative [GBMF6402]
- Rutgers University
- Ministry of Science and Technology of China [2016YFA0301001, 2016YFA0300500]
- National Research Foundation of Korea [2017K1A3A7A09016303] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- U.S. Department of Energy (DOE) [DE-SC0019503] Funding Source: U.S. Department of Energy (DOE)
A quantum spin liquid is a state of matter where unpaired electrons' spins, although entangled, do not show magnetic order even at the zero temperature. The realization of a quantum spin liquid is a long-sought goal in condensed-matter physics. Although neutron scattering experiments on the two-dimensional spin-1/2 kagome lattice ZnCu3(OD)(6)Cl-2 and triangular lattice YbMgGaO4 have found evidence for the hallmark of a quantum spin liquid at very low temperature (a continuum of magnetic excitations), the presence of magnetic and non-magnetic site chemical disorder complicates the interpretation of the data. Recently, the three-dimensional Ce3+ pyrochlore lattice Ce2Sn2O7 has been suggested as a clean, effective spin-1/2 quantum spin liquid candidate, but evidence of a spin excitation continuum is still missing. Here, we use thermodynamic, muon spin relaxation and neutron scattering experiments on single crystals of Ce2Zr2O7, a compound isostructural to Ce2Sn2O7, to demonstrate the absence of magnetic ordering and the presence of a spin excitation continuum at 35 mK. With no evidence of oxygen deficiency and magnetic/non-magnetic ion disorder seen by neutron diffraction and diffuse scattering measurements, Ce2Zr2O7 may be a three-dimensional pyrochlore lattice quantum spin liquid material with minimum magnetic and non-magnetic chemical disorder.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据