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Magnetic-field-induced phase transitions in the quasi-one-dimensional organic conductor HMTSF-TCNQ

Title
Magnetic-field-induced phase transitions in the quasi-one-dimensional organic conductor HMTSF-TCNQ
Authors
Murata, K.Fukumoto, Y.Yokogawa, K.Takaoka, R.Kang, W.Brooks, J. S.Graf, D.Yoshino, H.Sasaki, T.Kato, R.
Ewha Authors
강원
SCOPUS Author ID
강원scopus
Issue Date
2014
Journal Title
LOW TEMPERATURE PHYSICS
ISSN
1063-777XJCR Link1090-6517JCR Link
Citation
vol. 40, no. 4, pp. 371 - 376
Publisher
AMER INST PHYSICS
Indexed
SCI; SCIE; SCOPUS WOS
Abstract
Motivated by an interest to see if the field-induced (FI) phase in the charge-density wave (CDW) system is similar to the field-induced-SDW (FISDW) in (TMTSF)(2)X, (TMTSF: tetramethyltetraselenafulvalene), we examined the magnetic-field-induced phases in a quasi-one-dimensional (Q1D) organic conductor HMTSF-TCNQ (hexamethylene- tetraselenafulvalene- tetracyanoquinodimethane) under a pressure of 1.1 GPa, where the CDW occurring at 30K is suppressed. The work was carried out by measurements of angular-dependent magnetoresistance oscillations and exploratory work on the Hall effect. It turned out that the FI-phase, most likely a FICDW for B > 0.1 T, accompany a quantum Hall effect, and the FI-phase transitions are controlled by the field component along the least conducting axis. Above 10 T, the lowest Landau level of the small 2D Fermi pocket (due to incomplete nesting of Fermi surface) exceeds the Fermi level, reaching the quantum limit. Although there are many differences between the CDW (HMTSF-TCNQ) and SDW ((TMTSF) 2X) systems, a similar scenario for field-induced phases seems to hold. (C) 2014 AIP Publishing LLC.
DOI
10.1063/1.4869591
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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