Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.217003
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Funding
- MEXT [20340085, 21110504]
- JSPS, Japan
- Grants-in-Aid for Scientific Research [20340085, 21110504] Funding Source: KAKEN
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The effect of disorder on the electronic properties near the Mott transition is studied in an organic superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br, which is systematically irradiated by x rays. We observe that x ray irradiation causes Anderson-type electron localization due to molecular disorder. The resistivity at low temperatures demonstrates variable range hopping conduction with Coulomb interaction. The experimental results show clearly that the electron localization by disorder is enhanced by the Coulomb interaction near the Mott transition.
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