New possible quantum spin liquid systems

by Dr Saikat Nandi (IIT Bombay, India)

Wednesday 28 May 2025, 15:00 → 16:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N601 - Meeting Room (Tsung-Dao Lee Institute)

Time: 15:00 May 28 (Wednesday), 2025

Host: Prof. Vadim Grinenko

Venue: TDLI Meeting Room N601

Tencent meeting link:  https://meeting.tencent.com/dm/51lecRMzfAxP    Meeting ID: 294490672  , no password

 

Abstract:

In this talk, I will present an introductory review of the physics of quantum spin liquid (QSL) states, along with an overview of my recent experimental work in this area. I will cover the following topics: (1) why quantum spin liquids are of interest, (2) how they differ from conventional spin states, (3) how they can be identified experimentally, and (4) our recent results on spin-1/2 zigzag chains, QSL material realizations, and experimental progress.The study of quantum phases in strongly correlated electron systems has uncovered a rich landscape of emergent phenomena arising from the interplay of competing interactions. My research focuses on exploring exotic magnetic states, spin-gap behavior, and QSL phases in spin-1/2 systems. To probe these unconventional states at the microscopic level, I use advanced spectroscopic techniques such as nuclear magnetic resonance (NMR), electron spin resonance (ESR), and muon spin relaxation (μSR). These sensitive tools allow us to uncover subtle magnetic features, capturing both static and dynamic properties that are often inaccessible by other experimental methods.

 

Reference:

[1] Observation of the dimer-singlet phase in the one-dimensional S = 1/2 Heisenberg antiferromagnet Cu(Ampy)ClBr (Ampy= C6H8N2 = 2-(Aminomethyl)pyridine) [Arxiv: arXiv:2503.10290] (https://arxiv.org/abs/2503.10290)

 

Biography:

Over the past three years, I have worked as a Chanakya Postdoctoral Fellow at IIT Bombay, India. My expertise lies in experimental condensed matter physics, with a focus on frustrated magnetism, quantum spin liquid systems. I have experience in sample preparation and a wide range of bulk and local probe techniques, including magnetic and thermodynamic measurements, solid-state NMR, and muon spin relaxation (μSR). I am passionate about exploring quantum magnets under extreme conditions.