Details

Autor(en) / Beteiligte

• Clark, L
• Orain, J C
• Bert, F
• De Vries, M A
• Aidoudi, F H
• Morris, R E
• Lightfoot, P
• Lord, J S
• Telling, M T F
• Bonville, P
• Attfield, J P
• Mendels, P
• Harrison, A

Titel

Gapless spin liquid ground state in the S = 1/2 vanadium oxyfluoride kagome antiferromagnet [NH4]2[C7H14N][V7O6F18]

Ist Teil von

• Physical review letters, 2013-05, Vol.110 (20), p.207208-207208, Article 207208

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2013

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The vanadium oxyfluoride [NH(4)](2)[C(7)H(14)N][V(7)O(6)F(18)] (DQVOF) is a geometrically frustrated magnetic bilayer material. The structure consists of S = 1/2 kagome planes of V(4+) d(1) ions with S = 1 V(3+) d(2) ions located between the kagome layers. Muon spin relaxation measurements demonstrate the absence of spin freezing down to 40 mK despite an energy scale of 60 K for antiferromagnetic exchange interactions. From magnetization and heat capacity measurements we conclude that the S = 1 spins of the interplane V(3+) ions are weakly coupled to the kagome layers, such that DQVOF can be viewed as an experimental model for S = 1/2 kagome physics, and that it displays a gapless spin liquid ground state.