Superconducting pair condensation and phase coherence in cupratesexperimental determination of the corresponding phase diagram in La2-x Srx CuO4

  1. Cotón Sánchez, Noelia
Supervised by:
  1. Félix Vidal Costa Director
  2. Manuel Vázquez Ramallo Co-director

Defence university: Universidade de Santiago de Compostela

Fecha de defensa: 19 July 2013

Committee:
  1. Davor Pavuna Chair
  2. Carlos Carballeira Romero Secretary
  3. Fernando Sols Lucia Committee member
  4. Jesús Manuel Mosqueira Rey Committee member
  5. Bernard Mercey Committee member
Department:
  1. Department of Particle Physics

Type: Thesis

Teseo: 348379 DIALNET lock_openMINERVA editor

Abstract

The aim of this thesis is to study the interrelationships between the normal state pseudogap, the phenomenology of the superconducting transition, the inhomogeneities and the disorder in the cuprate superconductors (HTSC). Specifically, we study the resistivity in the ab planes and the voltage-current (VI) curves in superconducting thin films of La(2-x)Sr(x)CuO(4). Brief panning of work:- Synthesis of films of La(2-x)Sr(x)CuO(4) with different dopings. - Characterization of the doping inhomogeneity and critical temperature by SQUID magnetometry. - Measurements of the superconducting phase coherence temperature through VI curves. - Analysis of the superconducting wave function condensation temperature using finite element simulations. - Measurement of the superconducting wave function condensation temperature through the resistivity measured in the ohmic regime.