Pressure effect on large magnetoresistance in the lower charge-density-wave transition of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">NbSe</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Yasuzuka, Syuma; Okajima, Y.; Tanda, Satoshi; Yamaya, K.; Takeshita, Nao; Môri, N.

doi:10.1103/physrevb.60.4406

Cited by 20 publications

(21 citation statements)

References 19 publications

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“…16 In contrast, this phenomenon is suppressed by pressure in NbSe3 and Ba1-xRxIrO3, in which a magnetic field enhances the resistance anomaly associated with the formation of the lower CDW state. 17,18 TCDW1 further increases to 235 K at 2.8 GPa and then is no longer evident.…”

Section: B Electronic Transportmentioning

confidence: 95%

Pressure-induced charge density wave phase in Ag2−δTe

et al. 2018

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Considerable excitement was generated by the observation of large and linear positive magnetoresistance (MR) in non-magnetic silver chalcogenides. Renewed interest in these materials was kindled by the discovery that Ag2Te in particular is a topological insulator with gapless linear Dirac-type surface states. High-pressure x-ray diffraction studies, combined with first-principles electronic structure calculations, have identified three phase transitions as the pressure is increased: an isostructural transition identified with an electronic topological transition followed by two structural phase transitions. These recent studies were carried out on nominally stoichiometric Ag2Te. For the present work we have prepared single-phase self-doped Ag2-dTe samples with a well-characterized silver deficit (d = 2.0´10-4) for structural and electrical transport measurements over extended ranges of pressure (0-43 GPa), temperature (2-300 K) and magnetic field (0-9 T). The temperature dependence of the resistivity exhibits anomalous behavior at 2.3 GPa, slightly above the isostructural transition, which we postulate is due to Fermi surface reconstruction associated with a charge-density-wave (CDW) phase. The anomaly is enhanced by the application of a 9T magnetic field and shifted to higher temperature, implying that the electronic Zeeman energy is sufficient to alter the gapping of the Fermi surface. A peak in the pressure dependence of the resistivity and a sudden drop in the pressure dependence of the mobility, occurring at 2.3 GPa, provide additional evidence for a CDW phase at pressures slightly above the isostructural transition.

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Section: B Electronic Transportmentioning

confidence: 95%

Pressure-induced charge density wave phase in Ag2−δTe

et al. 2018

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“…Typically, large negative MR occurs in thin-film metals [24], manganese based perovskites [25,26] and some disordered systems [27,28], while large positive MR has been observed in semiconductors [29] and semimetals [8,30]. In general, there exists only a few of CDW materials, which show large positive MR [31][32][33]. The origin of the huge positive MR effect in the CDW state is still under debate.…”

Section: Introductionmentioning

confidence: 99%

Pressure induced superconductivity bordering a charge-density-wave state in NbTe4 with strong spin-orbit coupling

Yang

Zhou

Wang

et al. 2018

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Transition-metal chalcogenides host various phases of matter, such as charge-density wave (CDW), superconductors, and topological insulators or semimetals. Superconductivity and its competition with CDW in low-dimensional compounds have attracted much interest and stimulated considerable research. Here we report pressure induced superconductivity in a strong spin-orbit (SO) coupled quasi-one-dimensional (1D) transition-metal chalcogenide NbTe4, which is a CDW material under ambient pressure. With increasing pressure, the CDW transition temperature is gradually suppressed, and superconducting transition, which is fingerprinted by a steep resistivity drop, emerges at pressures above 12.4 GPa. Under pressure p = 69 GPa, zero resistance is detected with a transition temperature Tc = 2.2 K and an upper critical field μ0Hc2 = 2 T. We also find large magnetoresistance (MR) up to 102% at low temperatures, which is a distinct feature differentiating NbTe4 from other conventional CDW materials.

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“…So the occurrence of the u-SC phase and the enhancement of T c by increasing pressure might be due to the decrease in the nesting size of the FS. For the T 1 -CDW phase, however, Yasuzuka et al 29,30) showed that the magnitude of a magnetoresistance due to a pressure-induced imperfect nesting of the T 1 -CDW phase under high pressure is much smaller than that of the T 2 -CDW phase. This observation shows that the FS near P 1 still keeps good nesting condition as compaired with the case of the T 2 -CDW state despite the u-SC transition temperature is higher than the l-SC one.…”

Section: Discussionmentioning

confidence: 98%

Coexistence of the Upper Charge-Density-Wave and the Superconductivity in NbSe₃

et al. 2005

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We have extensively measured the resistance of NbSe 3 near critical pressure (P 1 ¼ 3:2 GPa) for the upper charge-density-wave (T 1 -CDW) phase. We reveal that the T 1 -CDW coexists with the superconducting (SC) phase between 2.0 GPa and 2.9 GPa. Near P 1 on the T 1 -CDW side, the T 1 -CDW transition temperature appears to be singularly, T 1 $ ðP 1 À PÞ 0:49AE0:03 and the SC transition is very broad and becomes much sharpened with increasing pressure. We discuss mechanism of the coexistence of the T 1 -CDW and the SC phase.

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Pressure effect on large magnetoresistance in the lower charge-density-wave transition ofNbSe3

Cited by 20 publications

References 19 publications

Pressure-induced charge density wave phase in Ag2−δTe

Pressure-induced charge density wave phase in Ag2−δTe

Pressure induced superconductivity bordering a charge-density-wave state in NbTe4 with strong spin-orbit coupling

Coexistence of the Upper Charge-Density-Wave and the Superconductivity in NbSe₃

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Pressure effect on large magnetoresistance in the lower charge-density-wave transition ofNbSe3

Cited by 20 publications

References 19 publications

Pressure-induced charge density wave phase in Ag2−δTe

Pressure-induced charge density wave phase in Ag2−δTe

Pressure induced superconductivity bordering a charge-density-wave state in NbTe4 with strong spin-orbit coupling

Coexistence of the Upper Charge-Density-Wave and the Superconductivity in NbSe3

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Coexistence of the Upper Charge-Density-Wave and the Superconductivity in NbSe₃