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2d Kagome lattice; visualization of a q=0 spin liquid

Highlight: New looks at old and new spin liquids Olexei I. Motrunich, California Institute of Technology, DMR 0907145.

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2d Kagome lattice; visualization of a q=0 spin liquid

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  1. Highlight: New looks at old and new spin liquids Olexei I. Motrunich, California Institute of Technology, DMR 0907145 The general context is study of spin liquid phases, enigmatic entangled states of quantum magnets lacking magnetic or any other local order. Our research explores such phases in specific models and seeks to expand both vocabulary of possible states and numerical tools to study them. We made a new attack on the venerated (and experimentally realized) Kagome anti-ferromagnet by developing a way to calculate trial energies in the Schwinger boson construction; by comparing with competing states, we find that a so-called q=0 spin liquid is a strong candidate, especially in the presence of small second-neighbor AF coupling. On a different front, we provided a precise realization of a novel SU(2)-invariant Majorana spin liquid with parton Fermi surfaces and explored its rich properties. 2d Kagome lattice; visualization of a q=0 spin liquid Exactly solvable model realizing an SU(2) Majorana spin liquid with parton Fermi surfaces; also shows rich features in the spin structure factor Critical metal-like phases of frustrated spins and bosonsOlexei I. Motrunich (Caltech),DMR-Award #

  2. Highlight: New looks at old and new spin liquids Olexei I. Motrunich, California Institute of Technology, DMR 0907145 * This award has directly supported research of two graduate students at Caltech. The students have learned and applied analytical and numerical techniques to study strongly correlated spin and boson systems of much current interest. One student defended his PhD thesis in May 2011 and is on his way to a postdoctoral position at UCSD, while the other student will graduate next year. A third student has joined the group and will be supported from the award during this academic year. The PI is also collaborating with researchers, including students and postdocs, at UC Santa Barbara and CSU-Northridge. Critical metal-like phases of frustrated spins and bosonsOlexei I. Motrunich (Caltech),DMR-Award #

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