Search for content and authors
 

Infrared measurements at high-pressures at the SISSI@Elettra beamline

Andrea Perucchi ,  Leonetta Baldassarre ,  Emanuele Arcangeletti ,  Daniele Di Castro ,  Paolo Postorino ,  Stefano Lupi 

Dipartimento di Fisica and Unita' INFM, Universita' di Roma "La Sapienza", Piazzale Aldo Moro 2, Roma 00185, Italy

Abstract

Strongly correlated electron systems are of great interest because of their complex phenomenology. Difficulties in achieving a proper understanding of these phenomena lie in the subtle interplay of electron-electron (U) interaction, electron-phonon (e-ph) interaction, and the electron bandwidth (W). Experimentally, W can be varied either by chemical doping or by applying hydrostatic pressure. The latter procedure is preferable since it permits to continuously tune W without introducing impurities and disorder.

High pressures can be achieved through the use of a diamond anvil cell (DAC). However, the small dimensions of the samples to be placed in a DAC make infrared measurements at high pressure a very challenging technique. The high brightness of an infrared synchrotron radiation source (IRSR) is of great help for performing measurements in a DAC with an adequate signal to noise ratio and over a broad spectral range.

We present here both reflectivity and transmission measurements performed at the IRSR beamline SISSI@Elettra. A special focus will be dedicated to the study of pressure-induced metal to insulator transitions in different vanadium oxide compounds.

 

Legal notice
  • Legal notice:
 

Presentation: Oral at E-MRS Fall Meeting 2007, Symposium I, by Andrea Perucchi
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-11 19:52
Revised:   2009-06-07 00:44