Possible quantum Hall effect in a magnetic-field-induced phase transition in the quasi-one-dimensional CDW organic conductor, HMTSF-TCNQ
- 주제(키워드) Charge density wave (CDW) , Magnetic-field-induced-CDW , HMTSF-TCNQ
- 등재 SCIE, SCOPUS
- 발행기관 ELSEVIER SCIENCE BV
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000114985
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.physb.2014.11.080
초록/요약
We have studied the angular dependence of magnetoresistance and Hall effect of the CDW organic conductor, HMTSF-TCNQ in order to see whether a magnetic-field-induced phase exists in the charge density wave (CDW) system, similarly to the magnetic-field-induced SDW phases in (TMTSF)(2)X. The anomaly in magnetoresistance was observed only around the pressure where the CDW is almost suppressed, i.e. around 0.8-1.1 GPa, but neither at low pressures (0 and 0.5 GPa) nor at high pressure above 2 GPa. This behavior is quite similar to that of (TMTSF)(2)X. At 1.1 GPa anomalies were found at fields of 0.2 T and 10 T. We speculate that at 1.1 GPa the field-induced phase is located between 0.2 T and 10 T, where 1D Fermi surface sheet and 20 Fermi-surface pocket are present. The R-xy shows plateau structure and R-xx was very small in the same region, suggestive of quantum Hall effect. (C) 2014 Elsevier B.V. All rights reserved.
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