Searching for Quantum Spin Liquids in Cerium-based Pyrochlores

Add to your list(s) Download to your calendar using vCal

• Benedikt Placke, Max Planck Institute
• Thursday 07 September 2023, 14:00-15:00
• TCM Seminar Room.

If you have a question about this talk, please contact Gaurav.

Spin liquids are magnetic states of matter with do not order even at the lowest temperatures, but instead feature strong, correlated fluctuations which are effectively described by an emergent gauge theory. Members of the family of materials called rare-earth Pyrochlores (R$_2$M$_2$O$_7$) have been known to host a classical spin liquid phase for a long time. Most prominently, the so-called “spin ice” compounds Dy$_2$Ti$_2$O$_7$ and Ho$_2$Ti$_2$O$_7$ realize an emergent Maxwell theory at low temperatures, with excitations taking the form of magnetic monopoles. Recent experiments on the cerium-based Pyrochlores Ce$_2$Zr$_2$O$_7$ and Ce$_2$Sn$_2$O$_7$ suggest that these materials may realize a quantum version of the this phase called “quantum spin ice”. In this talk, I focus on the theoretical description of cerium-based Pyrochlores. Their most general symmetry-allowed exchange Hamiltonian takes a remarkably simple form, that is a XYZ model on the Pyrochlore lattice. This allows us to make reliable numerical predictions for all available experimental measurements in the full phase diagram of this model and, in turn, to obtain reliable estimates for the Hamiltonian parameters for real materials. Along the way, we also gain new insights into the ground state phase diagram of the theory model.

This talk is part of the Theory of Condensed Matter series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Combined TCM Seminars and TCM blackboard seminar listing
• Featured lists
• Lennard-Jones Centre external
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• PMRFPS's
• School of Physical Sciences
• TCM Seminar Room
• Theory of Condensed Matter
• Thin Film Magnetic Talks
• few29

Note that ex-directory lists are not shown.