Quantum liquid of vortices in the quasi-two-dimensional organic superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>κ</mml:mi></mml:math>-(BEDT-TTF)<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi><mml:mo>(</mml:mo><mml:mi mathvariant="normal">NCS</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml

Sasaki, T.; Biberacher, W.; Neumaier, K.; Hehn, W.; Andres, K.; Fukase, Tetsuo

doi:10.1103/physrevb.57.10889

Cited by 83 publications

(97 citation statements)

References 30 publications

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“…Because B c2 is treated as a "crossover field" defined through Eq. 2, the values are different from others reported in the literature 13,8 .…”

Section: Discussioncontrasting

confidence: 66%

“…2 shows the in-phase and quadrature components of the AC susceptibility measured at 93 Hz; the inset shows the magnetisation obtained from integrating the in-phase component with field. The feature at 3.9 T in the AC susceptibility corresponds to the irreversibility field, B irr , measured in the torque magnetometry experiments of Sasaki et al 13 . In this paper, we define the irreversibility field as the field at which there is a rapid increase in the real and imaginary parts of the susceptibility corresponding to the onset of a strong diamagnetic response and pinning of the vortices (see Fig.…”

Section: Resultsmentioning

confidence: 64%

“…The low dimensionality together with short coherence length, result in fluctuations of the superconducting order parameter being important over a wide range in temperature and applied field. The importance of thermal 4,7,8,15,16 or quantum fluctuations 13,14,17 leads to, for example, a broadened anomaly in the specific heat capacity. The superconducting phase diagram of κ-(BEDT-TTF) 2 Cu(NCS) 2 has a complicated structure 14,18,19 .…”

Section: Introductionmentioning

confidence: 99%

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Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(
Clayton
¹
,
Ito
²
,
Hayden
³

et al. 2002
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We report measurements of the de Haas-van Alphen (DHVA) effect and AC susceptibility in the layered organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. The amplitude of the DHVA oscillations is attenuated over a wide field range above the irreversibility line, Birr(B), below which a rigid flux lattice is formed. Thus the DHVA effect provides a unique probe of the superconducting fluctuations at high fields in this material. We compare our measurements with other determinations of the superconducting phase diagram of κ-(BEDT-TTF)2Cu(NCS)2.

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“…Because B c2 is treated as a "crossover field" defined through Eq. 2, the values are different from others reported in the literature 13,8 .…”

Section: Discussioncontrasting

confidence: 66%

Section: Resultsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(
Clayton
¹
,
Ito
²
,
Hayden
³

et al. 2002
Phys. Rev. B
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“…The most important experimental finding of this study is that the jump in the resistivity disappears in a superconducting state with a finite resistivity due to the vortex flow, i. e., the vortex liquid state 23,24,26 below H c2 , as shown in Figs. 1(b) and 1(c).…”

Section: 818mentioning

confidence: 92%

Mott transition and superconductivity in the strongly correlated organic superconductorκ−(BEDT−TTF)2Cu[N(<

2008

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The magnetic field effect on the phase diagram of the organic Mott system κ-(BEDT-TTF)2Cu[N(CN)2]Br in which the bandwidth was tuned by the substitution of deuterated molecules was studied by means of the resistivity measurements performed in magnetic fields. The lower critical point of the first-order Mott transition, which ended on the upper critical field Hc2-temperature plane of the superconductivity, was determined experimentally in addition to the previously observed upper critical end point. The lower critical end point moved to a lower temperature with the suppression of Tc in magnetic fields and the Mott transition recognized so far as the S-shaped curve reached T = 0 when H > Hc2 in the end.PACS numbers: 74.70. Kn, 71.30.+h, 74.25.Dw Metal-insulator (MI) transitions have been one of the central issues in strongly correlated electron systems. Among the various types of MI transitions, the Mott transition is the most attractive phenomenon, which arises from an electron-electron interaction in a wide range of materials.1 Mott insulator derives from a large electrical Coulomb repulsion energy U with respect to the bandwidth W . Metal transitions can occur in two ways in a Mott insulator: one can change the strength of the interaction U/W , while maintaining the required bandfilling value and is referred to as a bandwidth-controlled Mott transition or one can introduce carriers with the required density, while maintaining U/W and is referred to as a band-filling-controlled Mott transition. The former case occurs, for example, in vanadium oxides and molecular conductors, while the latter occurs in high-T c cuprate superconductors.Organic charge transfer salts based on the donor molecule bis(ethylenedithio)-tetrathiafulvalene, abbreviated as BEDT-TTF or ET, have been recognized as a highly correlated electron system.2 Among them, κ-(ET) 2 X with X = Cu(NCS) 2 , Cu[N(CN) 2 ]Y (Y = Br and Cl), etc. has attracted considerable attention due to its strongly correlated quasi-two-dimensional electron system because the strong dimer structure consisting of two ET molecules makes the conduction band half filled.3,4 Furthermore, the softness of the lattice in molecular conductors enables us to easily modulate the bandwidth by applying small physical and chemical pressures, while maintaining the band-filling. Therefore, the κ-(ET) 2 X system has been considered to be one of the typical bandwidth-controlled Mott systems.The first-order Mott transition characterized by an Sshaped curve induces the correlated metal and superconductor phases from the Mott insulator phase by applying a small helium gas pressure or by the slight molecular substitution of the donor or anion molecules. 3,5,6,7,8 The relation and transitions among the various phases in the phase diagram have been studied extensively, both experimentally and theoretically. Several unique features have been found in association with the Mott transition. The first-order transition is terminated at T U cr ≃ 32- 40 K 6,8,9 , which is the upper critical end poin...

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“…A spike-like feature was observed only in sweep-down measurement. This is considered to be related to a flux jump 15,16 . It should be mentioned that the upper critical field for the fields perpendicular and parallel to the superconducting layers are estimated to be µ 0 H ⊥ c2 > 5 T and µ 0 H c2 > 50 T 13,14 .…”

Section: (B)mentioning

confidence: 99%

New Method for Torque Magnetometry Using a Commercially Available Membrane-Type Surface Stress Sensor

et al. 2017

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We present a new method for torque magnetometry by using a commercially available membranetype surface-stress sensor (MSS). This sensor has a silicon membrane supported by four beams in which piezoresistive paths are integrated. Although originally developed as a gas sensor, it can be used for torque measurement by modifying its on-chip aluminum interconnections. We demonstrate the magnetic-torque measurement of submillimeter-sized crystals at a low temperature and in strong magnetic fields. This MSS can observe de-Haas-van-Alphen oscillation, which confirms that it can be an alternative tool for self-sensitive microcantilevers.

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Quantum liquid of vortices in the quasi-two-dimensional organic superconductorκ-(BEDT-TTF)2Cu(NCS)

Cited by 83 publications

References 30 publications

Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(
Clayton
¹
,
Ito
²
,
Hayden
³

et al. 2002
Phys. Rev. B
15
1
12
0
View full text Add to dashboard Cite

Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(
Clayton
¹
,
Ito
²
,
Hayden
³

et al. 2002
Phys. Rev. B
15
1
12
0
View full text Add to dashboard Cite

Mott transition and superconductivity in the strongly correlated organic superconductorκ−(BEDT−TTF)2Cu[N(<

New Method for Torque Magnetometry Using a Commercially Available Membrane-Type Surface Stress Sensor

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Quantum liquid of vortices in the quasi-two-dimensional organic superconductorκ-(BEDT-TTF)2Cu(NCS)

Cited by 83 publications

References 30 publications

Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(Clayton1, Ito2, Hayden3 et al. 2002Phys. Rev. B151120View full textAdd to dashboardCite

Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(Clayton1, Ito2, Hayden3 et al. 2002Phys. Rev. B151120View full textAdd to dashboardCite

Mott transition and superconductivity in the strongly correlated organic superconductorκ−(BEDT−TTF)2Cu[N(<

New Method for Torque Magnetometry Using a Commercially Available Membrane-Type Surface Stress Sensor

Contact Info

Product

Resources

About

Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(
Clayton
¹
,
Ito
²
,
Hayden
³

et al. 2002
Phys. Rev. B
15
1
12
0
View full text Add to dashboard Cite

Superconducting fluctuations and the reduced dimensionality of the organic superconductorκ−(BEDT−TTF)2Cu(
Clayton
¹
,
Ito
²
,
Hayden
³

et al. 2002
Phys. Rev. B
15
1
12
0
View full text Add to dashboard Cite