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9 papers
Fractionalized excitations in the spin liquid state of a kagomé lattice antiferromagnet
Tian-Heng Han, Joel S. Helton, Shaoyan Chu +4
New physics can emerge in magnetic materials where quantum fluctuations are enhanced due to reduced dimensionality and strong frustration. One long sought example is the resonating…
Refining the Spin Hamiltonian in the Spin-1/2 Kagome Lattice Antiferromagnet ZnCu(OH)Cl using Single Crystals
Tianheng Han, Shaoyan Chu, Young S. Lee
We report thermodynamic measurements of the S=1/2 kagome lattice antiferromagnet ZnCu(OH)Cl, a promising candidate system with a spin-liquid ground state. Using s…
Measurement of an Exceptionally Weak Electron-Phonon Coupling on the Surface of the Topological Insulator BiSe Using Angle-Resolved Photoemission Spectroscopy
Z. -H. Pan, A. V. Fedorov, D. Gardner +3
Gapless surface states on topological insulators are protected from elastic scattering on non-magnetic impurities which makes them promising candidates for low-power electronic app…
Photoemission Spectroscopy of Magnetic and Non-magnetic Impurities on the Surface of the BiSe Topological Insulator
T. Valla, Z. -H. Pan, D. R. Gardner +2
Dirac-like surface states on surfaces of topological insulators have a chiral spin structure that suppresses back-scattering and protects the coherence of these states in the prese…
Synthesis and Characterization of Single Crystal Samples of Spin- Kagome Lattice Antiferromagnets in the Zn-Paratacamite Family ZnCu(OH)Cl
Tianheng Han, Joel S. Helton, Shaoyan Chu +6
The Zn-paratacamite family, ZnCu(OH)Cl for 0.33, is an ideal system for studying spin-1/2 frustrated magnetism in the form of antiferromagneti…
Electronic Structure of the Topological Insulator Bi2Se3 Using Angle-Resolved Photoemission Spectroscopy: Evidence for a Nearly Full Surface Spin Polarization
Z. -H. Pan, E. Vescovo, A. V. Fedorov +5
We performed high-resolution spin- and angle-resolved photoemission spectroscopy studies of the electronic structure and the spin texture on the surface of BiSe, a model to…