CMP Seminar - Tianheng Han - MIT - The Search For Quantum Spin Liquids(More about event)
The experimental realization of a quantum spin liquid ground state in two-dimensions-a new form of matter with no conventional broken symmetry-has been under intensive investigations for decades. Recently, this novel state has likely been discovered. I will talk about my successful crystal growth of Herbertsmithite ZnCu3(OH)6Cl2-a strongly frustrated antiferromagnet on a kagome lattice and the most promising host of a quantum spin liquid ground state. Anomalous x-ray diffraction and thermodynamic study give implications on the spin Hamiltonian beyond the simple Heisenberg exchange. Most excitingly, our inelastic neutron scattering result has undisputedly resolved a spinon continuum indicating a true quantum spin liquid ground state. The short range spin-spin correlation in this ground state will be compared with recent theoretical calculations. Further experimental studies, which can be performed on both herbertsmithite and other candidate compounds, will be proposed using additional cutting edge techniques.
Location: Jadwin A08
Date/Time: 01/12/12 at 3:15 pm - 01/12/12 at 4:15 pm
Category: Condensed Matter Seminar