Critical fields and magnetoresistance in the molecular superconductors (TMTSF)2X

Naughton, Michael; Lee, I.J.; Chaikin, P. M.; Danner, G. M.

doi:10.1016/s0379-6779(96)04440-2

Cited by 46 publications

(31 citation statements)

References 19 publications

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“…As described in the introduction, it may be connected with the proximity to the superconducting state for the inplane magnetic field. 25 Note that by comparing our theory to the one by Osada 17 (which assumes noninteracting electrons) the incoherent term in the y direction has a similar effect as a magnetic field in the x direction. In particular we have…”

Section: ͑13͒mentioning

confidence: 73%

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Magic-angle effects in the interlayer magnetoresistance of quasi-one-dimensional metals due to interchain incoherence

Lundin

McKenzie

2004

Phys. Rev. B

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The dependence of the magnetoresistance of quasi-one-dimensional metals on the direction of the magnetic field show dips when the field is tilted at the so-called magic angles determined by the structural dimensions of the materials. There is currently no accepted explanation for these magic-angle effects. We present a possible explanation. Our model is based on the assumption that, the intralayer transport in the second most conducting direction has a small contribution from incoherent electrons. This incoherence is modeled by a small uncertainty in momentum perpendicular to the most conducting (chain) direction. Our model predicts the magic angles seen in interlayer transport measurements for different orientations of the field. We compare our results to predictions by other models and to experiment.

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Section: ͑13͒mentioning

confidence: 73%

“…The data for in-plane magnetic field is affected by the fact that the sample is superconducting and the upper critical field H c2 for an in-plane magnetic field is quite large. 25 The consensus is that there is no accepted theory behind the appearance of the MA. The experimental situation is also unclear at the moment.…”

Section: Introductionmentioning

confidence: 99%

Magic-angle effects in the interlayer magnetoresistance of quasi-one-dimensional metals due to interchain incoherence

Lundin

McKenzie

2004

Phys. Rev. B

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“…Note that the FISDW phenomenon, experimentally discovered in the (TMTSF) 2 X compounds [1,2], where X=ClO 4 and X=PF 6 , was historically the first one which was successfully explained in terms of quasi-classical 3D → 2D dimensional crossover in high magnetic fields [3,[5][6][7]. At present, it has been established that different kinds of quasi-classical dimensional crossovers in a magnetic field are responsible for such unusual phenomena in layered Q1D conductors as the Field-Induced Charge-Density-Wave (FICDW) phase transitions [3,5,8,9], Danner-Kang-Chaikin oscillations [3,10], Lebed Magic Angles [3,11,12], and Lee-NaughtonLebed oscillations [3,[13][14][15][16]. Note that a characteristic property of the quasi-classical dimensional crossovers is that the typical "sizes" of electron trajectories in a magnetic field are much lager than the inter-plane or inter-chain distances in layered Q1D conductors.…”

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confidence: 99%

Quantum limit in a magnetic field for triplet superconductivity in a quasi-one-dimensional conductor

Lebed¹,

Sepper²

2014

Phys. Rev. B

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We theoretically consider the upper critical magnetic field, perpendicular to a conducting axis in a triplet quasi-one-dimensional superconductor. In particular, we demonstrate that, at high magnetic fields, the orbital effects against superconductivity in a magnetic field are reversible and, therefore, superconductivity can restore. It is important that the above mentioned quantum limit can be achieved in presumably triplet quasi-one-dimensional superconductor Li0.9Mo6O17 [J.-F. Mercure et al., Phys. Rev. Lett. 108, 187003 (2012)] at laboratory available pulsed magnetic fields of the order of H = 500 − 700 T .PACS numbers: 74.20. Rp, 74.70.Kn, 74.25.Op High magnetic field properties of quasi-onedimensional (Q1D) conductors and superconductors have been intensively studied since the discovery of the Field-Induced Spin-Density-Wave (FISDW) cascade of phase transitions [1][2][3][4]. Note that the FISDW phenomenon, experimentally discovered in the (TMTSF) 2 X compounds [1,2], where X=ClO 4 and X=PF 6 , was historically the first one which was successfully explained in terms of quasi-classical 3D → 2D dimensional crossover in high magnetic fields [3,[5][6][7]. At present, it has been established that different kinds of quasi-classical dimensional crossovers in a magnetic field are responsible for such unusual phenomena in layered Q1D conductors as the Field-Induced Charge-Density-Wave (FICDW) phase transitions [3,5,8,9], Danner-Kang-Chaikin oscillations [3,10], Lebed Magic Angles [3,11,12], and Lee-NaughtonLebed oscillations [3,[13][14][15][16]. Note that a characteristic property of the quasi-classical dimensional crossovers is that the typical "sizes" of electron trajectories in a magnetic field are much lager than the inter-plane or inter-chain distances in layered Q1D conductors.On the other hand, a different type of dimensional crossovers in a magnetic field -the so-called quantum dimensional crossover [3] -was suggested in Ref.[17] to describe magnetic properties of a superconducting phase. More specifically, it was shown [17][18][19][20][21][22] that, at high enough magnetic fields, the typical "sizes" of electron trajectories become of the order of inter-plane distances and superconductivity can restore as a pure 2D phase. Note that the above mentioned conclusion is valid only for some triplet superconducting phases which are not sensitive to the Pauli paramagnetic effects in a magnetic field. Due to this reason, Q1D superconductors (TMTSF) 2 X were considered for many years to be the best candidates for this Reentrant Superconductivity (RS) phenomenon, since triplet superconducting pairing was suggested [23,24] to exist in these materials. Recently, it has been shown [25,22,26] that d-wave singlet superconducting phase is more likely to exist in the (TMTSF) 2 ClO 4 , therefore, the RS phenomenon experimentally reveals itself in this compound only as the hidden RS phase [22].As to the superconductor (TMTSF) 2 PF 6 , the existing experimental data about nature of superconducting pairing in this compound a...

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“…Surprisingly, the metallic phase of the TMTSF 2 X materials exhibits a number of unconventional magnetic oscillations related to an open Q1D FS (1). Among them are ''magic angles'' (MA) [1][2][3][4][5][6][7][8][9], the first angular oscillations with a clear Fermi-liquid (FL) physical meaning -Danner-Kang-Chaikin (DKC) oscillations [10], the ''third angular effect'' [11][12][13][14][15][16][17][18][19], and rich angular oscillations recently discovered by Lee and Naughton [12,15,16] in TMTSF 2 PF 6 and Yoshino et al [17] in DMET 2 I 3 . We call the latter ''interference commensurate'' (IC) oscillations which reflects their physical meaning revealed in this Letter.…”

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confidence: 99%

Interference Commensurate Oscillations in Quasi-One-Dimensional Conductors

Lebed

Naughton

2003

Phys. Rev. Lett.

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We suggest an analytical theory to describe angular magnetoresistance oscillations recently discovered in the quasi-one-dimensional conductor (TMTSF)2PF6 [see Phys. Rev. B 57, 7423 (1998)]] and define the positions of the oscillation minima. The origin of these oscillations is related to interference effects resulting from Bragg reflections which occur as electrons move along quasiperiodic and periodic ("commensurate") electron trajectories in the extended Brillouin zone. We reproduce via calculations existing experimental data and predict some novel effects.

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Critical fields and magnetoresistance in the molecular superconductors (TMTSF)2X

Cited by 46 publications

References 19 publications

Magic-angle effects in the interlayer magnetoresistance of quasi-one-dimensional metals due to interchain incoherence

Magic-angle effects in the interlayer magnetoresistance of quasi-one-dimensional metals due to interchain incoherence

Quantum limit in a magnetic field for triplet superconductivity in a quasi-one-dimensional conductor

Interference Commensurate Oscillations in Quasi-One-Dimensional Conductors

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