Two- and fourfold<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ab</mml:mi></mml:math>-plane torque symmetry in untwinned<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:m

Ishida, Toshimasa; Okuda, K; Asaoka, Hidehito; Kazumata, Yukio; Noda, K.; Takei, Hiroyuki

doi:10.1103/physrevb.56.11897

Cited by 38 publications

(27 citation statements)

References 22 publications

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“…This equation is relatively simple, and has frequently been employed in the literature to analyze the electronic anisotropy of various high-T c cuprates. 10,11,15 The computer fitting of τ rev to the Kogan model gives the anisotropy parameter γ c = 2.8 − 4.8 where ηH c2 is fixed to 60 kG.…”

Section: Resultsmentioning

confidence: 99%

“…The electronic anisotropy of high-T c cuprates was investigated by Farrell et al 10 and Ishida et al 11 The high-T c cuprates are characterized by the extreme electronic anisotropy γ c = m c /m ab = 7 − 200 as well as the layered structure of superconductivity. The superconductivity is governed by the CuO 2 layers or by the CuO 2 bilayers.…”

Section: Introductionmentioning

confidence: 99%

“…This is well known as an intrinsic pinning peak for the high-T c cuprates. 11,12 The dashed line is the reversible component (see the fitted line in the top figure of Fig. 1).…”

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confidence: 99%

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Superconducting anisotropy and evidence for intrinsic pinning in single crystallineMgB2

et al. 2002

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We examine the superconducting anisotropy γc = (mc/m ab ) 1/2 of a metallic high-Tc superconductor MgB2 by measuring the magnetic torque of a single crystal. The anisotropy γc does not depend sensitively on the applied magnetic field at 10 K. We obtain the anisotropy parameter γc = 4.31 ± 0.14. The torque curve shows the sharp hysteresis peak when the field is applied parallel to the boron layers. This comes from the intrinsic pinning and is experimental evidence for the occurrence of superconductivity in the boron layers. \pacs{74.25. Ha,

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Superconducting anisotropy and evidence for intrinsic pinning in single crystallineMgB2

et al. 2002

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“…[10] For Td-MoTe2, the value of γ changes from 4 at T=5 K to 1.2 at T>70 K, which is also much smaller than those of graphite and Bi2Sr2CaCu2O8-δ. [27,28] Although the model εθ=(cos 2 θ+γ -2 sin 2 θ) 1/2 needs to be taken with caution due to the multiband of Td-MoTe2, it still can give some information on the mass anisotropy of materials. [12] To investigate the origins of XMR in Td-MoTe2, we firstly focus on the t-o effect under the applied magnetic field observed in Td-MoTe2, which is also a distinct feature of other XMR materials.…”

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confidence: 99%

“…Actually, it has been proposed to illuminate the anisotropic properties of high temperature superconductors and graphite. [24][25][26][27][28] The detailed description of the scaling model can be found in Supporting…”

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Extremely large magnetoresistance in the type-II Weyl semimetalMoTe2

et al. 2016

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We performed the angle dependent magnetoresistance (MR), Hall effect measurements, the temperature dependent magneto-thermoelectric power (TEP) S(T) measurements, and the first-principles calculations to study the electronic properties of orthorhombic phase MoTe2 (Td-MoTe2), which was proposed to be electronically two-dimensional (2D). There are some interesting findings about Td-MoTe2: (1) A scaling approach εθ=(sin 2 θ+γ -2 cos 2 θ) 1/2 is applied, where θ is the magnetic field angle with respect to the c axis of the crystal and γ is the mass anisotropy. Unexpectedly, the electronically 3D character with γ as low as 1.9 is observed in Td-MoTe2; (2) The possible Lifshitz transition and the following electronic structure change can be verified around T~150 K and T~60 K, which is supported by the evidence of the slop changing of the temperature dependence of TEP, the carrier density extracted from Hall resistivity and the onset temperature of γ obtained from the MR measurements. The extremely large MR effect in Td-MoTe2 could originate from the combination of the electron-hole compensation and a particular orbital texture on the electron pocket, which is supported by the calculations of electronic structure. Our results may provide a general scaling relation for the anisotropic MR and help to recognize the origins of the MR effect in other systems, such as the Weyl semimetals and the Dirac ones.

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Role of Intrinsic Pinning for Melting Transition of YBa2Cu3O6.93 in the Parallel Field to CuO2 Layers

Ishida

Kitamura

Okuda

et al. 1999

Advances in Superconductivity XI

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Vortex lattice melting of an untwinned YBa2Cu306.93 single crystal has been investigated by means of the ac susceptibility and the torque. The crystal shows the vortex-lattice-melting transition in Hlle configuration. The first-order-melting transition of vortex lattice occurs in H -ie, too. The anisotropy in the melting fields is consistent with the three-different mass anisotropy parameters. At lower temperatures, the torque curve shows a sharp peak in the irreversible torque at ()e ~ 90° due to intrinsic pinning. However, the melting transition in the H -ie configuration appears at temperatures, where the intrinsic-pinning peak is absent.

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Two- and fourfoldab-plane torque symmetry in untwinnedYBa2Cu3

Cited by 38 publications

References 22 publications

Superconducting anisotropy and evidence for intrinsic pinning in single crystallineMgB2

Superconducting anisotropy and evidence for intrinsic pinning in single crystallineMgB2

Extremely large magnetoresistance in the type-II Weyl semimetalMoTe2

Role of Intrinsic Pinning for Melting Transition of YBa2Cu3O6.93 in the Parallel Field to CuO2 Layers

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