Interplay between bandwidth-controlled and filling-controlled pressure-induced Mott insulator to metal transition in the molecular compound [Au(Et-thiazdt)
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub><mml:mrow><mml:mo>]</mml:mo></mml:mrow></mml:mrow></mml:math>

Brière, Benjamin; Caillaux, Jonathan; Gal, Yann Le; Lorcy, Dominique; Lupi, S.; Perucchi, A.; Zaghrioui, Mustapha; Soret, J. C.; Sopracase, R.; Ta-Phuoc, Vinh

doi:10.1103/physrevb.97.035101

Cited by 7 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, neutral nickel and gold bis(1,2‐dithiolene) complexes have been studied as single component conductors, due to attractive features such as their square planar geometry and delocalized electronic structure, which leads to favorable intermolecular stacking interactions (a requirement for solid state conductivity) and reversible and tunable redox chemistry. Additionally, neutral gold dithiolene complexes can behave as Mott insulators, with one radical per site, resulting in an activation barrier for conductivity behavior that can be overcome with pressure . Since the first molecular superconductor based on a metal dithiolene complex was reported, a charge transfer salt (TTF)[Ni(dmit) 2 ] 2 , a large number of neutral complexes containing dithiolene ligands with a TTF backbone have been synthesized, such as Au(ptdt) 2 , and Au(tmdt) 2 , showing metallic or near metallic behavior at ambient temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

High Ambipolar Mobility in a Neutral Radical Gold Dithiolene Complex

Mizuno

Benjamin

Shimizu

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

A new anionic gold dithiolene complex NBu 4 ·[1] is synthesized from the (1-((1,1-biphenyl)-4-yl-)-ethylene-1,2-dithiolene ligand 1, and the cis and trans isomers are separated by recrystallization. The trans isomer is oxidized via electrocrystallisation to the neutral gold dithiolene complex 2. Complex 2 crystalizes in 1D chains, held together by short (3.30-3.37 Å) S-S contacts, which are packed in a herringbone arrangement in the ab-plane. The complex exhibits semiconductor behavior (σ RT = 1.5 × 10 −4 S cm −1 ) at room temperature with a small activation energy (E a = 0.11 eV), with greater conductivity along the stacking direction. The charge transport behavior of complex 2 is further investigated in single-crystal field-effect transistor (FET) measurements, the first such measurements reported for gold dithiolene complexes. Complex 2 shows incredibly balanced ambipolar behavior in the single-crystal field-effect transistor (SC-FET), with high charge-carrier mobilities of 0.078 cm 2 V −1 s −1 , the highest ambipolar mobilities reported for metal dithiolene complexes. This well-balanced behavior, along with the activated conductivity and band structure calculations, suggests that 2 behaves as a Mott insulator. The magnetic properties are also studied by superconducting quantum interference device (SQUID) magnetometry and solid state 1 H NMR, with evidence of a nonmagnetic ground state at low temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

High Ambipolar Mobility in a Neutral Radical Gold Dithiolene Complex

Mizuno

Benjamin

Shimizu

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…Several gold dithiolene complexes have been reported to show enhanced conductivity, even superconductivity, under the application of pressure. 24,25,29,[47][48][49][50] With this in mind, the effect of pressure on the conductivity of 2 was investigated through measurements on a compressed pellet. As shown in Fig.…”

Section: Magnetic Propertiesmentioning

confidence: 99%