<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi></mi></mrow><mrow><mn>13</mn></mrow></msup></mrow><mi>C</mi><mi></mi><mi>NMR</mi></math></span> Measurements of the High-Magnetic-Field, Low-Temperature Phases of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mo>(</mo><mi>TMTTF</mi><mo>)</mo><mrow><msub><mrow><mi></mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mi>PF</mi><mrow><msub><mrow><mi></mi></mrow><mrow><mn>6</mn></mrow></msub></mrow></math></span>

S. E. Brown; W. G. Clark; F. Zamborszky; B. J. Klemme; G. Kriza; B. Alavi; C. Merlic; P. Kuhns; W. Moulton

doi:10.1103/PhysRevLett.80.5429

$^{13} C NMR$ Measurements of the High-Magnetic-Field, Low-Temperature Phases of $(TMTTF)_{2} PF_{6}$

S. E. Brown, W. G. Clark, F. Zamborszky, B. J. Klemme, G. Kriza, B. Alavi, C. Merlic, P. Kuhns, and W. Moulton

Phys. Rev. Lett. 80, 5429 – Published 15 June 1998

Abstract

We report NMR spectroscopy of ${}^{13}C - labeled$ TMTTF molecules in high-magnetic fields that established the field-temperature phase diagram for $(TMTTF)_{2} PF_{6}$ . The dimerized spin-Peierls $(D)$ ground state is driven to an incommensurate $(I)$ phase for fields $B > B_{c} = 19.1 \pm 0.1 T$ . In the $I$ phase, the staggered component of the magnetization is much larger for $(TMTTF)_{2} PF_{6}$ than it is for $CuGeO_{3}$ . On approaching the transition to the $D$ phase from higher temperatures, we observe an unusual broadening of the NMR spectrum which is probably from extrinsic sources and related to pinning of solitonlike excitations in individual chains.

Received 27 October 1997

DOI:https://doi.org/10.1103/PhysRevLett.80.5429

Authors & Affiliations

S. E. Brown¹, W. G. Clark¹, F. Zamborszky^1,2, B. J. Klemme¹, G. Kriza^2,3, B. Alavi¹, C. Merlic⁴, P. Kuhns⁵, and W. Moulton⁵

¹UCLA Department of Physics and Astronomy, Los Angeles, California 90095
²Institute of Physics, Technical University of Budapest, H-1111 Budapest, Hungary
³Research Institute for Solid State Physics, P.O. Box 49, H-1525 Budapest, Hungary
⁴UCLA Department of Chemistry and Biochemistry, Los Angeles, California 90095
⁵National High Magnetic Field Laboratory, Tallahassee, Florida 32310