Terahertz and direct current losses and the origin of non-Drude terahertz conductivity in the crystalline states of phase change materials

0423596 - FZÚ 2014 RIV US eng J - Journal Article
Shimakawa, K. - Wágner, T. - Frumar, M. - Kadlec, Filip - Kadlec, Christelle - Kasap, S.
Terahertz and direct current losses and the origin of non-Drude terahertz conductivity in the crystalline states of phase change materials.
Journal of Applied Physics. Roč. 114, č. 23 (2013), "233105-1"-"233105-7". ISSN 0021-8979. E-ISSN 1089-7550
R&D Projects: GA ČR GA13-12386S
Institutional support: RVO:68378271
Keywords : phase-change materials * terahertz conductivity * nanograins
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.185, year: 2013

THz and DC losses in crystalline states of GeSbTe and AgInSbTe phase-change material systems are re-examined and discussed. Although a simple free carrier transport has been assumed so far in the GeSbTe (GST) system, it is shown through recent experimental results that a series sequence of intragrain and intergrain (tunneling) transport, as recently formulated in Shimakawa, "The origin of non-Drude terahertz conductivity in nanomaterials," Appl. Phys. Lett. 100, 132102 (2012) may dominate the electronic transport in the commercially utilized GST system, producing a non-Drude THz conductivity.
Permanent Link: http://hdl.handle.net/11104/0229718