A high-temperature quantum spin liquid with polaron spins
By M. Klanjšek, A. Zorko, R. Žitko, J. Mravlje, Z. Jagličić, P. Biswas, P. Prelovšek, D. Mihailovic, D. Arčon. Nature Physics, 2017
194 citations recorded by the source corpus.
The existence of a quantum spin liquid (QSL) in which quantum fluctuations of spins are sufficiently strong to preclude spin ordering down to zero temperature was originally proposed theoretically more than 40 years ago, but its experimental realization turned out to be very elusive. Here we report on an almost ideal spin liquid state that appears to be realized by atomic-cluster spins on the triangular lattice of a charge-density wave state of 1T-TaS2. In this system, the charge excitations have a well-defined gap of ∼0.3 eV, while nuclear quadrupole resonance and muon-spin-relaxation experiments reveal that the spins show gapless QSL dynamics and no long-range magnetic order at least down to 70 mK. Canonical T2 power-law temperature dependence of the spin relaxation dynamics characteristic of a QSL is observed from 200 K to Tf = 55 K. Below this temperature, we observe a new gapless state with reduced density of spin excitations and high degree of local disorder signifying new quantum spin order emerging from the QSL. In the charge-density wave state of tantalum sulfide, tantalum atoms group into a Star-of-David arrangement. Experiments show that the polaron spins associated with these atomic clusters can form a quantum spin liquid.
Subfields: Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/3b5220d25dd21538d0b06db97b786d509b83e40e
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Condensed Matter Physics
In Materials Chemistry
Citations in the corpus
- Quantum spin liquids (2019, background): “An exciting recent proposal (138), which has received some experimental support (139, 140), is that the layered transition-metal dichalcogenide 1TTaS2 might be a quantum spin liquid.”