Photoinduced Melting of a Stripe-Type Charge-Order and Metallic Domain Formation in a Layered BEDT-TTF-Based Organic Salt

S. Iwai, K. Yamamoto, A. Kashiwazaki, F. Hiramatsu, H. Nakaya, Y. Kawakami, K. Yakushi, H. Okamoto, H. Mori, and Y. Nishio
Phys. Rev. Lett. 98, 097402 – Published 1 March 2007

Abstract

Photoinduced melting of charge-order (CO) in [bis(ethylenedithiolo)]-tetrathiafulvalene (BEDT-TTF) salts was investigated by femotosecond spectroscopy. Comparative studies on two polytypes exhibiting large [θ(BEDTTTF)2RbZn(SCN)4] and small [α(BEDTTTF)2I3] molecular rearrangements through the CO transition were performed. Ultrafast melting of CO for both compounds demonstrates the major contribution of the electronic instability which is due to Coulomb interaction. The roles of the molecular rearrangements on the formation of the CO and the metallic domain are discussed on the basis of low-frequency lattice dynamics.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 14 April 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.097402

©2007 American Physical Society

Authors & Affiliations

S. Iwai1,2,*, K. Yamamoto3, A. Kashiwazaki1, F. Hiramatsu1, H. Nakaya1, Y. Kawakami1, K. Yakushi3, H. Okamoto4,5, H. Mori6, and Y. Nishio7

  • 1Department of Physics, Tohoku University, Sendai 980-8578, Japan
  • 2PRESTO-JST, Kawaguchi 332-0012, Japan
  • 3Institute of Molecular Science, Okazaki 444-8585, Japan
  • 4Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan
  • 5CREST-JST, Kawaguchi 332-0012, Japan
  • 6Institute of Solid State Physics, University of Tokyo, Kashiwa 277-8561, Japan
  • 7Department of Physics, Toho University, Chiba 274-8510, Japan

  • *Electronic address: s.iwai@sspp.phys.tohoku.ac.jp

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 98, Iss. 9 — 2 March 2007

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×