Naslov
What is the origin of anomalous dielectric response in layered organic crystals?

Autori
Pinterić, Marko ; Ivek, Tomislav ; Čulo, Matija ; Basletić, Mario ; Tafra, Emil ; Milat, Ognjen ; Korin-Hamzić, Bojana ; Dressel, Martin ; Schweitzer, Dieter ; Schlueter, J.A. ; Miyagawa, K ; Kanoda, K ; Tomić, Silvia

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
ICSM2014 Abstracts / Oesterbacka, Ronald - Turku : University of Turku, 2014, 13-13

Skup
International Conference for Science and Technology of Synthetic Metals (ICSM2014)

Mjesto i datum
Turku, Finska, 30.06.2014. - 05.07.2014

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
strongly correlated systems; two-dimensional molecular solids; dielectric response; charge ordering; Mott insulators; quantum spin liquid

Sažetak
Novel forms of the low-temperature phases in the two-dimensional molecular solids with competing interactions between charges, spins and lattice, in particular those featuring anomalous dielectric relaxation, have been the focus of intense activity in recent years. Open issues concern the nature of collective charge excitations as well as their coupling to applied ac and dc electric fields. The charge response is reasonably well understood by now in the charge-ordered phase with the formation of ferroelectric-like domains below the metal-to-insulator phase transition [1, 2]. Conversely, the dielectric response observed in dimer Mott insulator phases with no charge ordering is rather intriguing [3, 4, 5]. In this presentation we review our recent results of anisotropic complex conductivity (dc – MHz) in the magnetic phase of kappa-(BEDT-TTF)2Cu[N(CN)2]Cl and in the spin-liquid phase of kappa-(BEDT-TTF)2Cu2(CN)3 [6, 7]. We discuss possible explanations for the observed dynamics and compare them with the well-known fingerprints of the charge/spin density wave response to ac electric fields. [1] T.Ivek et al., Phys.Rev.B83, 165128 (2011). [2] T.Ivek et al., Phys.Rev.B86, 245125 (2012). [3] M.Abdel-Jawad et al., Phys.Rev.B82, 125119 (2010). [4] S.Iguchi et al., Phys.Rev.B87, 075107 (2013). [5] P.Lunkenheimer et al., Nat. Mater. 11, 755 (2012). [6] S.Tomic et al., J.Phys.: Condens.Matter 25, 436004 (2013). [7] M.Pinteric et al., in preparation (2014).

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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