Evidence for the formation of a Mott state in potassium-intercalated pentacene

被引：35

作者：

Craciun, Monica F. ^{[1
,2
]}

Giovannetti, Gianluca ^{[3
,4
,5
]}

Rogge, Sven ^{[1
]}

Brocks, Geert ^{[4
,5
]}

Morpurgo, Alberto F. ^{[1
,6
,7
]}

van den Brink, Jeroen ^{[3
,8
,9
,10
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands

[2] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[3] Leiden Univ, Inst Lorentz Theoret Phys, NL-2300 RA Leiden, Netherlands

[4] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands

[5] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[6] Univ Geneva, DPMC, CH-1211 Geneva 4, Switzerland

[7] Univ Geneva, GAP, CH-1211 Geneva 4, Switzerland

[8] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6500 GL Nijmegen, Netherlands

[9] Stanford Univ, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

[10] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 12期

关键词：

electrical conductivity; intercalation compounds; metal-insulator transition; organic compounds; organic semiconductors; potassium compounds; thin films; THIN-FILM TRANSISTORS; DOPED PENTACENE; ELECTRICAL-PROPERTIES; ELECTRONIC TRANSPORT; COULOMB INTERACTION; STAGE STRUCTURE; CIRCUITS; EXCITONS; EXCHANGE; SPECTRA;

D O I：

10.1103/PhysRevB.79.125116

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate electronic transport through pentacene thin films intercalated with potassium. From temperature-dependent conductivity measurements we find that potassium-intercalated pentacene shows metallic behavior in a broad range of potassium concentrations. Surprisingly, the conductivity exhibits a re-entrance into an insulating state when the potassium concentration is increased past one atom per molecule. We analyze our observations theoretically by means of electronic structure calculations, and we conclude that the phenomenon originates from a Mott metal-insulator transition, driven by electron-electron interactions.

引用

页数：8

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