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

K. Murata; Y. Fukumoto; K. Yokogawa; R. Takaoka; W. Kang; J. S. Brooks; D. Graf; H. Yoshino; T. Sasaki; R. Kato

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

K. Murata, Y. Fukumoto, K. Yokogawa, R. Takaoka, W. Kang, J. S. Brooks, D. Graf, H. Yoshino, T. Sasaki, R. Kato

Department of Physics

Research output: Contribution to journal › Article › peer-review

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)₂X, (TMTSF: tetramethyltetraselenafulvalene), we ex-amined 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 like-ly 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. Al-though there are many differences between the CDW (HMTSF-TCNQ) and SDW ((TMTSF) ₂X) systems, a sim-ilar scenario for field-induced phases seems to hold.

Original language	English
Pages (from-to)	477-483
Number of pages	7
Journal	Fizika Nizkikh Temperatur
Volume	40
Issue number	4
State	Published - Apr 2014

Keywords

Charge-density wave
Fermi sur-face
Field-induced phase transitions
HMTSF-TCNQ
Magnetoresistance
Nesting

Cite this

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title = "Magnetic-field-induced phase transitions in the quasi-one-dimensional organic conductor HMTSF-TCNQ",

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)2X, (TMTSF: tetramethyltetraselenafulvalene), we ex-amined 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 like-ly 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. Al-though there are many differences between the CDW (HMTSF-TCNQ) and SDW ((TMTSF) 2X) systems, a sim-ilar scenario for field-induced phases seems to hold.",

keywords = "Charge-density wave, Fermi sur-face, Field-induced phase transitions, HMTSF-TCNQ, Magnetoresistance, Nesting",

author = "K. Murata and Y. Fukumoto and K. Yokogawa and R. Takaoka and W. Kang and {S. Brooks}, J. and D. Graf and H. Yoshino and T. Sasaki and R. Kato",

year = "2014",

month = apr,

language = "English",

volume = "40",

pages = "477--483",

journal = "Fizika Nizkikh Temperatur",

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publisher = "ILTPE-B. Verkin Institute for Low Temperature Physics and Engineering",

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TY - JOUR

T1 - Magnetic-field-induced phase transitions in the quasi-one-dimensional organic conductor HMTSF-TCNQ

AU - Murata, K.

AU - Fukumoto, Y.

AU - Yokogawa, K.

AU - Takaoka, R.

AU - Kang, W.

AU - S. Brooks, J.

AU - Graf, D.

AU - Yoshino, H.

AU - Sasaki, T.

AU - Kato, R.

PY - 2014/4

Y1 - 2014/4

N2 - 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)2X, (TMTSF: tetramethyltetraselenafulvalene), we ex-amined 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 like-ly 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. Al-though there are many differences between the CDW (HMTSF-TCNQ) and SDW ((TMTSF) 2X) systems, a sim-ilar scenario for field-induced phases seems to hold.

AB - 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)2X, (TMTSF: tetramethyltetraselenafulvalene), we ex-amined 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 like-ly 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. Al-though there are many differences between the CDW (HMTSF-TCNQ) and SDW ((TMTSF) 2X) systems, a sim-ilar scenario for field-induced phases seems to hold.

KW - Charge-density wave

KW - Fermi sur-face

KW - Field-induced phase transitions

KW - HMTSF-TCNQ

KW - Magnetoresistance

KW - Nesting

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SN - 0132-6414

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SP - 477

EP - 483

JO - Fizika Nizkikh Temperatur

JF - Fizika Nizkikh Temperatur

IS - 4

ER -

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

Abstract

Keywords

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