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APS » Journals » Phys. Rev. Lett. » Volume 103 » Issue 13
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Phys. Rev. Lett. 103, 136401 (2009) [4 pages]

Quantum Critical Scaling in the Single-Particle Spectrum of a Novel Anisotropic Metal

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Feng Wang1, J. V. Alvarez2, J. W. Allen1, S.-K. Mo1,*, J. He3, R. Jin4, D. Mandrus4,5, and H. Höchst6
1Randall Laboratory, University of Michigan, Ann Arbor, Michigan 48109, USA
2Departamento de Física de la Materia Condensada, and Instituto de Física de Materiales Nicolás Cabrera. Universidad Autónoma de Madrid, 28049 Madrid, Spain
3Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA
4Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
5Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
6Synchrotron Radiation Center, University of Wisconsin–Madison, Stoughton, Wisconsin 53589, USA

Received 2 March 2009; published 21 September 2009

See accompanying Physics Viewpoint

We report an angle resolved photoemission spectroscopy study of quantum critical scaling in the single-particle spectral function of a novel anisotropic metal Li0.9Mo6O17. We find a temperature (T) scaling exponent value and also low-T angle resolved photoemission spectroscopy line shapes that are very challenging for current one-dimensional theory frameworks. These results add a new spectroscopic component to a growing collection of puzzling low-T transport behaviors of this material.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.136401
DOI:
10.1103/PhysRevLett.103.136401
PACS:
71.10.Pm, 74.20.Mn, 79.60.−i

*Present address: Department of Physics, Stanford University, Stanford, CA 94305, USA.

 
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