Field-Induced CDW Phases in a Quasi-One-Dimensional Organic Conductor, HMTSF-TCNQ Under Pressure of 1 GPa in Magnetic Field of 31 T

Murata, Keizo; Kang, W.; Masuda, Kosuke; Fukumoto, Y.; Graf, David; Kiswandhi, Andhika; Choi, Eun Sang; Brooks, J. S.; Sasaki, T.; Yokogawa, Keiichi; Yoshino, Hideaki; Kato, Reìzo

doi:10.1007/s10909-012-0799-9

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…Hence with HMTSF-TCNQ, it is easy to use a simple pressure clamp apparatus in high magnetic fields. Our studies on HMTSF-TCNQ show magneto-resistance kinks around 1.1 GPa, but neither at ambient pressure nor at 2 GPa [8][9][10][11][12]. This feature implies that a scenario similar to that of FISDW holds.…”

Section: Introductioncontrasting

confidence: 57%

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

Murata

Fukumoto

Yokogawa

et al. 2014

Low Temperature Physics

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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 30 K 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) 2 X) systems, a similar scenario for field-induced phases seems to hold.

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Section: Introductioncontrasting

confidence: 57%

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

Murata

Fukumoto

Yokogawa

et al. 2014

Low Temperature Physics

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“…Hence with HMTSF-TCNQ, it is easy to use a simple pressure clamp apparatus in high magnetic fields. Our studies on HMTSF-TCNQ show magnetoresistance (MR) kinks around ~1 GPa, but neither at ambient pressure nor at 2 GPa [8]- [12]. This feature implies that a scenario similar to that of FISDW in (TMTSF) 2 PF 6 holds.…”

Section: Introductionmentioning

confidence: 56%

“…Therefore we established the model that below B//z = 10 T, there is a coexistence of 1D and 2D FS, above 10 T the 1D FS survives and the 2D FS disappears due to the quantum limit of the lowest Landau limit. Figure 5(a) shows the R xy of the Stage II sample [12]. And with the Stage III samples, the result has settled to Figure 5(b).…”

Section: History Of Our Study On the Field-induced Phases In Hmtsf-tcnqmentioning

confidence: 89%

Magnetic-Field-Induced Phase Transition and a Possible Quantum Hall Effect in the Quasi-One-Dimensional CDW Organic Conductor HMTSF-TCNQ

Murata

Fukumoto²,

Yokogawa³

et al. 2014

JMP

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In the Temperature-Pressure phase diagram, the quasi-one-dimensional conductor, HMTSF-TCNQ, the ground state at ambient pressure is an insulator of charge density wave (CDW) below 30 K, while it shows a good metallic nature at higher temperature. The CDW insulating state is suppressed by a pressure of 1 GPa, which is considered to be a quantum critical point. Neither at 0 -0.5 nor 2 GPa but only around this critical point in pressure, field-induced phases appear from 0.2 T through 10 T, where Rxy is almost constant and Rxx is very low. These phenomena are achieved when the magnetic field is applied along the least conducting axis. The behaviors are consistent with a kind of Quantum Hall Effect (QHE). The field-induce phase accompanied by the QHE might be the field-induced CDW (FICDW) similar to that of FISDW, observed in (TMTSF)2X salts. This paper presents the latest result of the Hall effects reviewing the history of the authors' work on this material from preliminary to the latest ones.

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Condensed Matter Physics Laboratory, Department of Physics, Graduate School of Science, Osaka City University

敬一¹

2013

The Review of High Pressure Science and Technology

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Field-Induced CDW Phases in a Quasi-One-Dimensional Organic Conductor, HMTSF-TCNQ Under Pressure of 1 GPa in Magnetic Field of 31 T

Cited by 3 publications

References 13 publications

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

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

Magnetic-Field-Induced Phase Transition and a Possible Quantum Hall Effect in the Quasi-One-Dimensional CDW Organic Conductor HMTSF-TCNQ

Condensed Matter Physics Laboratory, Department of Physics, Graduate School of Science, Osaka City University

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