Preface

Chapter 7 **Spintronics Driven by Superconducting Proximity Effect 127**

**Superconductors – A Point-Contact Spectroscopy**

Chapter 9 **How to Distinguish the Mixture of Two D-wave States from**

Chapter 10 **Measurements of Stationary Josephson Current between High-Tc Oxides as a Tool to Detect Charge Density Waves 199** Alexander M. Gabovich, Mai Suan Li, Henryk Szymczak and

Yuriy G. Pogorelov, Mario C. Santos and Vadim M. Loktev

Carolina Romero-Salazar and Omar Augusto Hernández-Flores

Chapter 11 **Impurity Effects in Iron Pnictide Superconductors 221**

Chapter 12 **Theory of Flux Cutting for Type-II Superconducting Plates at**

Chapter 8 **The Superconducting Order Parameter in High-Tc**

Guoxing Miao

**Viewpoint 149**

**Section 2 Theory 181**

**VI** Contents

M. Tortello and D. Daghero

Alexander I. Voitenko

**Critical State 251**

**Pure D-wave State of HTSC 183** Peter Brusov and Tatiana Filatova

Superconductivity is developing steadily and new perspective materials appear each year. Electrodynamics of superconductors is also a vigorously evolving field of science. A lot of books on superconductivity can be found in libraries and on Internet.

This book is a collection of chapters dealing with various old and new problems of the su‐ perconducting state. It includes 8 experimental and 4 theoretical chapters written by wellknown specialists and young researchers. Oxides, pnictides, chalcogenides and intermetallic compounds are described here. The superconducting order parameter symmetry is dis‐ cussed and consequences of the actual non-trivial symmetry are studied. Impurity and tun‐ neling effects are among topics covered by the chapters.

I hope the book will be useful for undergraduates, postgraduates and professionals.

**Dr. Alex Gabovich** Institute of Physics Kiev, Ukraine

**Section 1**
