Microwave Absorption Studies on the Frustrated Kitaev Model Candidate Material alpha-RuCl3

By Christoph Wellm

Master's Thesis from the year 2018 in the subject Physics - Experimental Physics, grade: 1,0, Dresden Technical University (IFW Dresden), language: English, abstract: Dive into the enigmatic world of quantum magnetism, where conventional magnetic order dissolves, giving rise to exotic states of matter. This investigation probes the microwave absorption properties of α-RuCl3, a material garnering significant attention as a potential host for the elusive Kitaev quantum spin liquid. By employing cutting-edge experimental techniques, including high-field electron spin resonance (ESR) and SQUID magnetometry, this study meticulously dissects the magnetic behavior of α-RuCl3 across a spectrum of temperatures and intense magnetic fields. Journey through the theoretical underpinnings of magnetic moments, spin Hamiltonians, and the intricacies of frustrated magnetic systems, culminating in a deep dive into the Kitaev honeycomb model. Unravel the experimental methodologies that enable the detection of fractionalized excitations, the telltale signs of a quantum spin liquid state. Discover how dynamic susceptibility measurements via ESR and static magnetization measurements using SQUID magnetometry provide crucial insights into the material's magnetic characteristics. Explore the experimental setups designed to capture the subtle nuances of α-RuCl3's magnetic response, pushing the boundaries of measurement capabilities. Witness the unveiling of resonant and non-resonant absorption modes, meticulously analyzed to discern their origins and relationship to magnetic ordering. Confront the unexpected behaviors observed in regions devoid of long-range magnetic order, challenging existing theoretical frameworks. This research navigates the complex landscape of quantum magnetism, seeking to bridge the gap between theoretical predictions and experimental observations in the ongoing quest to understand and harness the power of quantum spin liquids. Explore the correlation between microwav

• Format: Paperback
• Language: English
• ISBN: 3346346862
• ISBN13: 9783346346865
• Release Date: May 2021
• Publisher: Grin Verlag
• Length: 68 Pages
• Weight: 0.22 lbs.
• Dimensions: 0.2" x 5.8" x 8.3"