Angle-Resolved Photoemission Spectroscopy on High-Temperature Superconductors: Studies of Bi2212 and Single-Layer Fese Film Grown on Srtio3 Substrate

ISBN-13: 9783662527306 / Angielski / Twarda / 2016 / 126 str.

Junfeng He

Opis

This book mainly focuses on the study of the high-temperature superconductor Bi2Sr2CaCu2O8+ (Bi2212) and single-layer FeSe film grown on SrTiO3 (STO) substrate by means of angle-resolved photoemission spectroscopy (ARPES). It provides the first electronic evidence for the origin of the anomalous high-temperature superconductivity in single-layer FeSe grown on SrTiO3 substrate. Two coexisted sharp-mode couplings have been identified in superconducting Bi2212. The first ARPES study on single-layer FeSe/STO films has provided key insights into the electronic origin of superconductivity in this system. A phase diagram and electronic indication of high Tc and insulator to superconductor crossover have been established in the single-layer FeSe/STO films. Readers will find essential information on the techniques used and interesting physical phenomena observed by ARPES.
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Spis treści

Brief introduction to cuprates and Fe-based high Tc superconductors.- The discovery of high Tc superconductors.- Cuprates.- Fe-based superconductors.- Introduction to angle-resolved photoemission spectroscopy (ARPES).- Energy resolution.- Momentum resolution (three-step model).- The physical processes in photoemission.- Development of state-of-the-art ARPES systems.- ARPES systems.- Ultraviolet laser-based ARPES system.- Tunable laser-based ARPES system.- Spin-resolved ARPES system.- Time-of-flight system.- Coexistence of two coupling modes and their momentum dependence in Bi2Sr2CaCu2O8+δ.- Introduction.- Materials and methods.- Fine structures in Bi2Sr2CaCu2O8+δ with similarities to those in Pb probed by tunneling.- Introduction.- Observation of the fine structures.-Electronic structures of the superconducting single-layer FeSe film grown on SrTiO3 substrate.- Introduction.- Methods.- Phase diagram of the single-layer FeSe films and electronic indication of superconductivity at 65K.- Introduction.- Materials and methods.- Insulator to superconductor crossover in single-layer FeSe films and strong electron coupling.- Introduction.- Materials and methods.

O autorze

Junfeng He received his B.Sc. in physics from Sichuan University, China in 2008. He obtained his Ph.D. in condensed matter physics from the Institute of Physics, Chinese Academy of Sciences in July 2013. His PhD thesis was nominated as the "Most Outstanding PH.D Thesis" in 2014 by the Chinese Academy of Sciences. His major research project in Professor Xingjiang Zhou's group was investigation of the electronic structures of advanced materials via Angle Resolved Photoemission Spectroscopy (ARPES). Subsequently, he became a Postdoctoral Fellow working with Prof. Ruihua He at Boston College (September 2013-September 2015) and with Professor Z-X Shen in Stanford from October 2015. Dr. He has published 25 articles in reputed journals, including two Nature Materials, three Nature Communications, one PNAS (Proceedings of the National Academy of Sciences) and one PRL (Physical Review Letters) article as the first/co-first author.

Blurb

This book mainly focuses on the study of the high-temperature superconductor Bi2Sr2CaCu2O8+δ (Bi2212) and single-layer FeSe film grown on SrTiO3 (STO) substrate by means of angle-resolved photoemission spectroscopy (ARPES). It provides the first electronic evidence for the origin of the anomalous high-temperature superconductivity in single-layer FeSe grown on SrTiO3 substrate. Two coexisted sharp-mode couplings have been identified in superconducting Bi2212. The first ARPES study on single-layer FeSe/STO films has provided key insights into the electronic origin of superconductivity in this system. A phase diagram and electronic indication of high Tc and insulator to superconductor crossover have been established in the single-layer FeSe/STO films. Readers will find essential information on the techniques used and interesting physical phenomena observed by ARPES.