Publication

Doping-induced change of optical properties in underdoped cuprate superconductors

Publications associées (32)

Pulsed laser deposition of (SrBa)Nb2O6 thin films and their properties

Strontium barium niobate (SrxBa1-xNb2O6, shortly SBN) is a solid solution system with tetragonal tungsten bronze crystal structure. It exhibits a ferroelectric phase with only one polar axis and a transition temperature depending on the Sr/Ba ratio. This t ...

EPFL2005

Low temperature electrical transport in Ag substituted LaMnO3 polycrystalline pellets prepared by a pyrophoric method Purchase the full-text article References and further reading may be available for this article. To view references and further reading you must purchase this article. Manjusha Battabyala and T.K DeyCorresponding Author Contact Information, a, E-mail The Corresponding Author

A detailed investigation of the electrical resistivity of a series of monovalent (Ag) doped polycrystalline La1−xAgxMnO3 pellets with x ranging from 0.05 to 0.30 and measured over the temperature range between 10 and 350 K is reported. La1−xAgxMnO3 compoun ...

Elsevier2004

Photoemission studies of thin films grown by pulsed laser deposition

Mike Abrecht

In this thesis I report on the unique novel possibilities offered by combining pulsed laser deposition (PLD) film growth of high temperature superconductors with angle integrated and angle resolved photoemission spectroscopy (PES and ARPES). The originalit ...

EPFL2003

Electronic properties of high temperature superconducting thin films grown by pulsed laser deposition

Giorgio Margaritondo, Davor Pavuna, Dominique Cloëtta, Mike Abrecht

We use a pulsed laser deposition (PLD) setup to grow ultra-thin films of high temperature superconductors (HTSC) and transfer them in-situ into a photoemission chamber. Photoemission measurements on such films allow us to study noncleavable materials, but ...

Spie-Int Society Optical Engineering2002

Superfluid and normal-fluid density in the cuprate superconductors

Giorgio Margaritondo, László Forró, Helmuth Berger

As carriers are introduced into the cuprates (by doping the insulating "parent" compounds) spectral weight appears in the optical spectrum at photon energies below the charge-transfer gap. This spectral weight increases as the doping level increases. Magne ...

2001

Conductivity, dielectric and piezoelectric properties of SrBi4Ti4O15

Strontium Bismuth Titanate is a very promising material for high temperature piezoelectric applications, its elevated ferroelectric phase transition (530°C), linear piezoelectric properties under low field and relatively low room temperature conductivity ( ...

EPFL2000

Etude par microscopie électronique à transmission à haute résolution de l'élargissement thermique des parois de domaines ferroélectriques dans un système de premier ordre

The macroscopic properties of ferroelectric materials depend directly on the domain configuration and the structure of the domain boundaries. For this reason, their study is of great scientific and technological interest. Several models have been developed ...

EPFL2000

Study and control of the conductivity of Nb-doped Bi4Ti3O12 for high temperature piezoelectric applications

Nava Setter, Dragan Damjanovic

Bismuth-based layered compounds have been considered during the last years as interesting materials fur high temperature piezoelectric applications, due to their stability and wide thermal range of the ferroelectric activity. The high electrical conductivi ...

1999

Co-doped Bi2Sr2CaCu2Ox: Anderson localization and superconductivity

Giorgio Margaritondo, Helmuth Berger

Cobalt-doping of Bi2Sr2CaCu2Ox beyond a critical level of 1.5-1.7 at % produces both a large decrease in the superconducting transition critical temperature and all of the classic symptoms of Anderson localization. These include: a negative slope of the ab ...

1994

7Ni-O Chemical Interaction and the Transition-Temperature of Ni-Doped Bi2Sr2Ca1Cu2O8

Giorgio Margaritondo, László Forró, Helmuth Berger

We find that even very low Ni doping levels of high-quality Bi2Sr2Ca1Cu2O8 single crystals strongly affect the transition temperature T(c). We also observed that T(c) is not related to the total Ni concentration, but only to that of Ni engaged in NiO-type ...

1993

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