Transport properties of HMTSF-TCNQ up to 8 GPa and a novel hysteresis and quantum oscillatory behavior in magnetoresistance in magnetic field up to 31 Tesla

Murata, Keizo; Yokogawa, Keiichi; Brooks, J. S.; Kismarahardja, Ade; Steven, Eden; Kano, Masayuki; Seno, Yoshiki; Tamilselvan, Natarajan Rani; Yoshino, Hideaki; Sasaki, T.; Jérôme, D.; Senzier, Pascale Auban; Bechgaard, K.; Uruichi, Mikio; Yakushi, Kyuya

doi:10.1088/1742-6596/215/1/012064

Cited by 5 publications

(6 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: 59%

“…All the samples used for this transport study were examined by x-ray, confirming sharp Brag spots. According to Phillips [3], the crystal is monoclinic, though nearly orthorhombic; a = = 21.999 (14), b = 12.573 (8), c = 3.890(1) Å; = 90.29(4). Since previously crystal axes have been assigned in different ways [3,15], to avoid confusion, we adopt the x, y, and z labeling of the most, second and least conducting axes respectively, which correspond to the b, a, and c (or c, b, and a) axes in the Weger's (or Phillips's ) convention.…”

Section: Methodsmentioning

confidence: 99%

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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: 59%

Section: Methodsmentioning

confidence: 99%

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%

“…The MR of R xx shows undulations with hysteretic curves, which continued up to the maximum studied field 31 T. Copyright permission is requested for Ref. [8] for (a), for Ref. [10] for (b), (c), and for Ref.…”

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

confidence: 99%

“…Pressure at low temperature for later works was calibrated against the superconducting transition temperature. Figure 3(a) is the MR of the sample from Stage I with the pressure of about 1.4 GPa at low temperature (inset pressure value is of 300 K) [8]. The MR of R xx shows undulations with hysteretic curves, which continued up to the maximum studied field 31 T. Copyright permission is requested for Ref.…”

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

confidence: 99%

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

et al. 2012

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Transport properties of HMTSF-TCNQ up to 8 GPa and a novel hysteresis and quantum oscillatory behavior in magnetoresistance in magnetic field up to 31 Tesla

Cited by 5 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

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

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