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From Quantum Phase transitions to Addressable Spin Clusters

English title From Quantum Phase transitions to Addressable Spin Clusters
Applicant Rønnow Henrik M.
Number 116590
Funding scheme Project funding (Div. I-III)
Research institution Institut de physique de la matière condensée EPFL - SB - ICMP
Institution of higher education EPF Lausanne - EPFL
Main discipline Condensed Matter Physics
Start/End 01.04.2007 - 31.03.2010
Approved amount 297'586.00
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Keywords (9)

Quantum magnetism; Phase transitions; Ising model; spin glass; Neutron scattering; Magnetism; Quantum; Spin Glasses; susceptibility

Lay Summary (English)

Lay summary
This research project aims to investigate the LiReF4 (Re=rare-earth) family of compounds, which host a remarkably rich variety of interesting collective quantum phenomena. Their magnetic properties are governed by the crystal fields and dominated by simple dipolar interaction, both of which can be completely characterized, hence offering ideal model systems where experimental observations can be tested quantitatively by theory.Combining bulk and neutron scattering measurements, we intend to investigate a variety of materials and physical phenomena, including:-Mixed nuclear-electronic criticality in LiHoF4-Phase diagram of the random field Ising model LiHoxY1-xF4-Magnetic properties and models for LiREF4, RE = Eu - Lu as well as Y and Sc-Dynamics and criticality in the planar antiferromagnet LiErF4-Addressable spin clusters in dilute LiHoxY1-xF4-Controlled nuclear spins in LiHoF4-Cooperative quantum optics in LiErxY1-xF4At the centre of the project are two PhD students, who form part of a wider network of collaboration and resources. In addition to the neutron scattering facilities at PSI, and the new Laboratory for Quantum Magnetism at EPFL, the project resonates with the Swiss national effort on correlated electron systems largely within the MaNEP programme, and internationally benefit from ties to leading neutron sources, theorists and high quality collaborators
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants


Associated projects

Number Title Start Funding scheme
121898 Dimer Physics - from new Quantum Phases to Superconductivity 01.01.2009 Project funding (Div. I-III)
126751 Nanofabricated devices based on intrinsically layered correlated electron materials 01.12.2009 Project funding (Div. I-III)
121397 Sub-Kelvin high sensitivity magnetometer for magnetic materials exploration 01.07.2008 R'EQUIP
121343 Horizontal-field cryomagnet for neutron scattering 01.11.2008 R'EQUIP
130522 Quantum Magnetism - Dimer Physics and Dipolar Criticality 01.04.2010 Project funding (Div. I-III)
133815 Setup for studies of quantum phenomena in condensed matter systems at ultra-low temperatures in magnetic vector fields 01.04.2012 R'EQUIP