Disorder-Induced Quantum Spin Liquid in Spin Ice Pyrochlores
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
- Univ. of California, Santa Barbara, CA (United States). Kavli Inst. for Theoretical Physics
We propose that in a certain class of magnetic materials, known as non-Kramers “spin ice,” disorder induces quantum entanglement. Instead of driving glassy behavior, disorder provokes quantum superpositions of spins throughout the system and engenders an associated emergent gauge structure and set of fractional excitations. More precisely, disorder transforms a classical phase governed by a large entropy, classical spin ice, into a quantum spin liquid governed by entanglement. As the degree of disorder is increased, the system transitions between (i) a “regular” Coulombic spin liquid, (ii) a phase known as “Mott glass,” which contains rare gapless regions in real space, but whose behavior on long length scales is only modified quantitatively, and (iii) a true glassy phase for random distributions with large width or large mean amplitude.
- Research Organization:
- Univ. of California, Santa Barbara, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-08ER46524
- OSTI ID:
- 1536485
- Alternate ID(s):
- OSTI ID: 1344819
- Journal Information:
- Physical Review Letters, Vol. 118, Issue 8; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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