Experimental Realization of a Quantum Pentagonal Lattice.

Abstract:

:Geometric frustration, in which competing interactions give rise to degenerate ground states, potentially induces various exotic quantum phenomena in magnetic materials. Minimal models comprising triangular units, such as triangular and Kagome lattices, have been investigated for decades to realize novel quantum phases, such as quantum spin liquid. A pentagon is the second-minimal elementary unit for geometric frustration. The realization of such systems is expected to provide a distinct platform for studying frustrated magnetism. Here, we present a spin-1/2 quantum pentagonal lattice in the new organic radical crystal α-2,6-Cl2-V [=α-3-(2,6-dichlorophenyl)-1,5-diphenylverdazyl]. Its unique molecular arrangement allows the formation of a partially corner-shared pentagonal lattice (PCPL). We find a clear 1/3 magnetization plateau and an anomalous change in magnetization in the vicinity of the saturation field, which originate from frustrated interactions in the PCPL.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Yamaguchi H,Okubo T,Kittaka S,Sakakibara T,Araki K,Iwase K,Amaya N,Ono T,Hosokoshi Y

doi

10.1038/srep15327

subject

Has Abstract

pub_date

2015-10-15 00:00:00

pages

15327

issn

2045-2322

pii

srep15327

journal_volume

5

pub_type

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