Evidence of band-filling control of τ-type organic conductors by thermal treatment

H. Yoshino, T. Nakanishi, Lin Li, Keizo Murata, D. Graf, E. S. Choi, J. S. Brooks, Yoshio Nogami, G. C. Papavassiliou

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The two dimensional (2D) organic conductor τ-(EDO-S,S-DMEDT-TTF) 2(AuBr2)1+y, (y ≤ 0.875) is known to exhibit sample dependence of the electric resistivity. The present authors assumed that the possible difference in y is responsible for the sample dependence and the amount of y can be effectively controlled for each crystal by thermal treatment. If it is the case, the band filling of the present compound can be also controlled. To observe the change in the band filling directly, the magnetoresistance was measured up to 45 T at 0.5 K for the magnetic field perpendicular to the conducting ab plane of the samples from one single crystal, one of which had been heated up to 400 K. Both the samples showed the two series of Shubnikov-de Haas oscillations of the magnetoresistance as reported previously. We, however, found the remarkable difference in the frequency of the slower oscillations between the virgin and heated samples. The X-ray study revealed that the thermal treatment does not affect the crystal structure related to the 2D band structure. Thus the frequency change by the thermal treatment is caused by the change in the band filling and it is tuned by heating the crystal.

Original languageEnglish
Pages (from-to)453-456
Number of pages4
JournalSynthetic Metals
Volume153
Issue number1-3
DOIs
Publication statusPublished - Sep 21 2005

Fingerprint

Organic conductors
conductors
Heat treatment
Magnetoresistance
Crystals
Electric conductivity
Band structure
Crystal structure
oscillations
Single crystals
Magnetic fields
Heating
X rays
crystals
conduction
electrical resistivity
crystal structure
heating
single crystals
magnetic fields

Keywords

  • Magnetotransport
  • Organic conductors based on radical cation salts
  • Transport measurement

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Yoshino, H., Nakanishi, T., Li, L., Murata, K., Graf, D., Choi, E. S., ... Papavassiliou, G. C. (2005). Evidence of band-filling control of τ-type organic conductors by thermal treatment. Synthetic Metals, 153(1-3), 453-456. https://doi.org/10.1016/j.synthmet.2005.07.329

Evidence of band-filling control of τ-type organic conductors by thermal treatment. / Yoshino, H.; Nakanishi, T.; Li, Lin; Murata, Keizo; Graf, D.; Choi, E. S.; Brooks, J. S.; Nogami, Yoshio; Papavassiliou, G. C.

In: Synthetic Metals, Vol. 153, No. 1-3, 21.09.2005, p. 453-456.

Research output: Contribution to journalArticle

Yoshino, H, Nakanishi, T, Li, L, Murata, K, Graf, D, Choi, ES, Brooks, JS, Nogami, Y & Papavassiliou, GC 2005, 'Evidence of band-filling control of τ-type organic conductors by thermal treatment', Synthetic Metals, vol. 153, no. 1-3, pp. 453-456. https://doi.org/10.1016/j.synthmet.2005.07.329
Yoshino H, Nakanishi T, Li L, Murata K, Graf D, Choi ES et al. Evidence of band-filling control of τ-type organic conductors by thermal treatment. Synthetic Metals. 2005 Sep 21;153(1-3):453-456. https://doi.org/10.1016/j.synthmet.2005.07.329
Yoshino, H. ; Nakanishi, T. ; Li, Lin ; Murata, Keizo ; Graf, D. ; Choi, E. S. ; Brooks, J. S. ; Nogami, Yoshio ; Papavassiliou, G. C. / Evidence of band-filling control of τ-type organic conductors by thermal treatment. In: Synthetic Metals. 2005 ; Vol. 153, No. 1-3. pp. 453-456.
@article{6e935c63a4934a678045fc8757d14bbb,
title = "Evidence of band-filling control of τ-type organic conductors by thermal treatment",
abstract = "The two dimensional (2D) organic conductor τ-(EDO-S,S-DMEDT-TTF) 2(AuBr2)1+y, (y ≤ 0.875) is known to exhibit sample dependence of the electric resistivity. The present authors assumed that the possible difference in y is responsible for the sample dependence and the amount of y can be effectively controlled for each crystal by thermal treatment. If it is the case, the band filling of the present compound can be also controlled. To observe the change in the band filling directly, the magnetoresistance was measured up to 45 T at 0.5 K for the magnetic field perpendicular to the conducting ab plane of the samples from one single crystal, one of which had been heated up to 400 K. Both the samples showed the two series of Shubnikov-de Haas oscillations of the magnetoresistance as reported previously. We, however, found the remarkable difference in the frequency of the slower oscillations between the virgin and heated samples. The X-ray study revealed that the thermal treatment does not affect the crystal structure related to the 2D band structure. Thus the frequency change by the thermal treatment is caused by the change in the band filling and it is tuned by heating the crystal.",
keywords = "Magnetotransport, Organic conductors based on radical cation salts, Transport measurement",
author = "H. Yoshino and T. Nakanishi and Lin Li and Keizo Murata and D. Graf and Choi, {E. S.} and Brooks, {J. S.} and Yoshio Nogami and Papavassiliou, {G. C.}",
year = "2005",
month = "9",
day = "21",
doi = "10.1016/j.synthmet.2005.07.329",
language = "English",
volume = "153",
pages = "453--456",
journal = "Synthetic Metals",
issn = "0379-6779",
publisher = "Elsevier BV",
number = "1-3",

}

TY - JOUR

T1 - Evidence of band-filling control of τ-type organic conductors by thermal treatment

AU - Yoshino, H.

AU - Nakanishi, T.

AU - Li, Lin

AU - Murata, Keizo

AU - Graf, D.

AU - Choi, E. S.

AU - Brooks, J. S.

AU - Nogami, Yoshio

AU - Papavassiliou, G. C.

PY - 2005/9/21

Y1 - 2005/9/21

N2 - The two dimensional (2D) organic conductor τ-(EDO-S,S-DMEDT-TTF) 2(AuBr2)1+y, (y ≤ 0.875) is known to exhibit sample dependence of the electric resistivity. The present authors assumed that the possible difference in y is responsible for the sample dependence and the amount of y can be effectively controlled for each crystal by thermal treatment. If it is the case, the band filling of the present compound can be also controlled. To observe the change in the band filling directly, the magnetoresistance was measured up to 45 T at 0.5 K for the magnetic field perpendicular to the conducting ab plane of the samples from one single crystal, one of which had been heated up to 400 K. Both the samples showed the two series of Shubnikov-de Haas oscillations of the magnetoresistance as reported previously. We, however, found the remarkable difference in the frequency of the slower oscillations between the virgin and heated samples. The X-ray study revealed that the thermal treatment does not affect the crystal structure related to the 2D band structure. Thus the frequency change by the thermal treatment is caused by the change in the band filling and it is tuned by heating the crystal.

AB - The two dimensional (2D) organic conductor τ-(EDO-S,S-DMEDT-TTF) 2(AuBr2)1+y, (y ≤ 0.875) is known to exhibit sample dependence of the electric resistivity. The present authors assumed that the possible difference in y is responsible for the sample dependence and the amount of y can be effectively controlled for each crystal by thermal treatment. If it is the case, the band filling of the present compound can be also controlled. To observe the change in the band filling directly, the magnetoresistance was measured up to 45 T at 0.5 K for the magnetic field perpendicular to the conducting ab plane of the samples from one single crystal, one of which had been heated up to 400 K. Both the samples showed the two series of Shubnikov-de Haas oscillations of the magnetoresistance as reported previously. We, however, found the remarkable difference in the frequency of the slower oscillations between the virgin and heated samples. The X-ray study revealed that the thermal treatment does not affect the crystal structure related to the 2D band structure. Thus the frequency change by the thermal treatment is caused by the change in the band filling and it is tuned by heating the crystal.

KW - Magnetotransport

KW - Organic conductors based on radical cation salts

KW - Transport measurement

UR - http://www.scopus.com/inward/record.url?scp=24644435547&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24644435547&partnerID=8YFLogxK

U2 - 10.1016/j.synthmet.2005.07.329

DO - 10.1016/j.synthmet.2005.07.329

M3 - Article

AN - SCOPUS:24644435547

VL - 153

SP - 453

EP - 456

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

IS - 1-3

ER -