13C NMR measurements of the high-magnetic-field, low-temperature phases of (TMTTF)2PF6

被引：22

作者：

Brown, SE ^{[1
]}

Clark, WG

Zamborszky, F

Klemme, BJ

Kriza, G

Alavi, B

Merlic, C

Kuhns, P

Moulton, W

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Tech Univ Budapest, Inst Phys, H-1111 Budapest, Hungary

[3] Res Inst Solid State Phys, H-1525 Budapest, Hungary

[4] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[5] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.80.5429

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report NMR spectroscopy of C-13-labeled TMTTF molecules in high-magnetic fields that established the field-temperature phase diagram for (TMTTF)(2)PF6. The dimerized spin-Peierls (D) ground state is driven to an incommensurate (I) phase for fields B > B-c = 19.1 +/- 0.1 T. In the I phase, the staggered component of the magnetization is much larger for (TMTTF)(2)PF6 than it is for CuGeO3. 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.

引用

页码：5429 / 5432

页数：4

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