Magnetic excitation spectrum of the square lattice<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">S</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn><mml:mo>∕</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math>Heisenberg antiferromagnet<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">K</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:mrow></mml:math>
M. D. Lumsden(Oak Ridge National Laboratory), S. Park(National Institute of Standards and Technology), B. C. Sales(Oak Ridge National Laboratory), S. E. Nagler(University of Tennessee at Knoxville), D. M. Tennant(University of Tennessee at Knoxville), S.-H. Lee(University of Virginia), D. F. McMorrow(London Centre for Nanotechnology)
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