Field-induced CDW in HMTSF-TCNQ

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

doi:10.1016/j.physb.2012.01.066

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…Actually, magnetoresistance at 0.4 K showed some number of kink structures in the field-sweep up to 27 Tesla (sometimes to 31 Tesla) as shown in Figure 2. These kink structures are the evidence for the field-induced phase transitions, which are of first order since they accompany hysteresis [37,38]. The latest results of the present authors are; (i) Hall voltage above around 4 Tesla shows three or four steps of plateau up to 31 Tesla suggestive of quantum Hall effect.…”

Section: Stacking Pattern (Viewed Along 1d)supporting

confidence: 61%

Pressure Effect on Organic Conductors

et al. 2012

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Section: Stacking Pattern (Viewed Along 1d)supporting

confidence: 61%

Pressure Effect on Organic Conductors

et al. 2012

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“…HMTSF-TCNQ is a classical quasi-one-dimensional charge-transfer complex that was discovered in the 1970s, and it has attracted considerable attention in contemporary research, owing to the possibility of field-induced CDW [16][17][18]. HMTSF-TCNQ has components that are similar to those of the well-known organic complexes TTF-TCNQ and TMTSF 2 PF 6 , which are known as a typical organic conductor that has a CDW and the first organic superconductor identified, respectively [19,20].…”

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confidence: 99%

Nodal-line semimetal HMTSF-TCNQ: Anomalous orbital diamagnetism and charge density wave

Ozaki,

Tateishi,

Matsuura

et al. 2021

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This study investigates the electronic states and physical quantities of an organic charge-transfer complex HMTSF-TCNQ, which undergoes a charge-density-wave (CDW) phase transition at temperature Tc ≃ 30 K. A first-principles calculation is utilized to determine that the normal state is a topological semimetal with open nodal lines. Besed on the first-principles calculation, we develop a tight-binding model to investigate the electronic state in detail. Below Tc, the CDW phase is examined in the tight-binding scheme using the mean-field approximation. It is shown that the open nodal lines are deformed into closed ones, and their shapes are sensitive to the order parameter. Using this tight-binding model, we theoretically evaluate the temperature dependencies of two physical quantities: the spin-lattice relaxation time T1 and the orbital magnetic susceptibility. In particular, an anomalous plateau is obtained at low temperatures in the orbital diamagnetism. We presume that this anomalous plateau originates owing to the conflict between the interband diamagnetism, impurity scattering, and the nodal line deformation. We also conduct an experiment to investigate the orbital magnetism, and the results are in excellent quantitative agreement with the theory.

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