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Phys. Rev. Lett. 81, 3984–3987 (1998)

Singular Behavior in the Pressure-Tuned Competition between Spin-Peierls and Antiferromagnetic Ground States of (TMTTF)2PF6

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D. S. Chow1, P. Wzietek2, D. Fogliatti1, B. Alavi1, D. J. Tantillo3, C. A. Merlic3, and S. E. Brown1
1Department of Physics and Astronomy, The University of California at Los Angeles, Los Angeles, California 90095-1547
2Laboratoire de Physique des Solides, Université de Paris, Sud, Orsay, France
3Department of Chemistry and Biochemistry, The University of California at Los Angeles, Los Angeles, California 90095-1569

Received 15 June 1998; published in the issue dated 2 November 1998

The Mott-Hubbard insulator (TMTTF)2PF6 is well known to have a spin-Peierls ground state at ambient pressure below 18 K, although antiferromagnetic order is stabilized for P>Pc = 0.9 GPa hydrostatic pressure. Near Pc, the transition temperature of both phases appears to be singularly depressed to less than 9 K, consistent with a system where the normal-state physics is controlled by a low-dimensional quantum critical point.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.3984
DOI:
10.1103/PhysRevLett.81.3984
PACS:
76.60.Es, 75.40.-s, 75.50.Ee
 
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