Commensurability effect of magnetoresistance anisotropy in the quasi-one-dimensional conductor tetramethyltetraselenafulvalenium perchlorate, (TMTSF<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">ClO</mml:mi></mml:mrow><m

Osada, Toshiko; Kawasumi, A.; Kagoshima, S.; Miura, N.; Saito, G.

doi:10.1103/physrevlett.66.1525

Cited by 153 publications

(91 citation statements)

References 12 publications

(7 reference statements)

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“…These materials are quasi-one-dimensional (Q1D) organic conductors with transfer integrals of order 250, 25, and 0.25 meV for the a, b, and c axis directions respectively. In the SC state, evidence for p-wave pairing exists since the critical field H c2 exceeds the Pauli limit when the field is aligned parallel to the molecular planes [8,9] [12,13]. Here the field is aligned along crystal planes composed of the a-axis and integer combinations of the b and c unit cell parameters.…”

Section: Introductionmentioning

confidence: 99%

“…Above H c2 , in the metallic state, magic angle effects [11] were first observed in (TMTSF) 2 ClO 4 [12,13] (and later in (TMTSF) 2 PF 6 [14]) as dips at magic angles in angular dependent magnetoresistance (ADMR) data for tilted magnetic field in the bc-planes, perpendicular to the most conducting a-axis. The magic angles occur when tanθ ≈ 1.1 p/q, where θ is the angle between the field and c-axis, and p, q are integer values of the c and b unit cell parameters respectively [12,13]. Here the field is aligned along crystal planes composed of the a-axis and integer combinations of the b and c unit cell parameters.…”

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confidence: 99%

“…In the SC state, evidence for p-wave pairing exists since the critical field H c2 exceeds the Pauli limit when the field is aligned parallel to the molecular planes [8,9], and additionally from Knight shift studies in (TMTSF) 2 PF 6 [10]. Above H c2 , in the metallic state, magic angle effects [11] were first observed in (TMTSF) 2 ClO 4 [12,13] (and later in (TMTSF) 2 PF 6 [14]) as dips at magic angles in angular dependent magnetoresistance (ADMR) data for tilted magnetic field in the bc-planes, perpendicular to the most conducting a-axis. The magic angles occur when tanθ ≈ 1.1 p/q, where θ is the angle between the field and c-axis, and p, q are integer values of the c and b unit cell parameters respectively [12,13].…”

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Resonant Nernst Effect in the Metallic and Field-Induced Spin Density Wave States of(TMTSF)2ClO4

et al. 2005

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We examine an unusual phenomenon where, in tilted magnetic fields near magic angles parallel to crystallographic planes, a "giant" resonant Nernst signal has been observed by Wu et al.[Phys. Rev. Lett. 91 56601(2003)] in the metallic state of an organic conducting Bechgaard salt. We show that this effect appears to be a general feature of these materials, and is also present in the field induced spin density wave phase with even larger amplitude. Our results place new restrictions on models that treat the metallic state as an unconventional density wave or as a state with finite Cooper pairing.PACS Numbers (72.15.Jf, 72.15.Gd, 75.30.Fv) 2 The Bechgaard salts, (TMTSF) 2 X (X=PF 6 , ClO 4 , AsF 6 , ReO 4 ,…) continue to attract attention due to the proximity of novel ground states including antiferromagnetic spin density waves (SDW), unconventional superconducting (SC) and metallic states, and magnetic field induced spin density wave (FISDW) states [1,2]. Recently, arguments have been made for the coexistence of the SDW, SC, and metallic states along phase boundaries [3][4][5], for the possibility that the metallic state is an unconventional SDW phase [6], and even for the survival of p-wave Cooper pairing in the metallic state [7].Most studied are (TMTSF) 2 PF 6 (under pressure to remove the ambient pressure SDW phase) and (TMTSF) 2 ClO 4 . These materials are quasi-one-dimensional (Q1D) organic conductors with transfer integrals of order 250, 25, and 0.25 meV for the a, b, and c axis directions respectively. In the SC state, evidence for p-wave pairing exists since the critical field H c2 exceeds the Pauli limit when the field is aligned parallel to the molecular planes [8,9] [12,13]. Here the field is aligned along crystal planes composed of the a-axis and integer combinations of the b and c unit cell parameters. Above a threshold field H th , the FISDW state (with a cascade of subphases) is stabilized due to the quantized nesting of the Q1D Fermi surface [1,15]. Unlike the tan(θ) dependence, the threshold and subphases in the FISDW phase are driven by the field component perpendicular to the conducting ab planes, i.e. the "cosine law" H ⊥ =H cos(θ).In this Letter we examine the longitudinal (Seebeck or TEP) and transverse (Nernst) thermoelectric effects in the metallic and FISDW phases in (TMTSF) 2 ClO 4 (hereafter ClO 4 ). The Nernst effect, an analogue of the Hall effect, is the transverse voltage induced by a temperature gradient in a magnetic field. It has been studied in cuprates due to its sensitivity to the vortex state, where large Nernst signal can be induced by phase slip 3 [16,17]. On the other hand, quasi particles in normal Fermi liquids with one type of charge carriers are known to generate very small Nernst effect because of so called the "Sondheimer cancellation" [18,19]. When more than two types of carriers are involved, the cancellation is not perfect and the Nernst effect can be finite with an order of (e/k B )(T/T F )(ω c τ) where k B T F is the Fermi energy, ω c is the cyclotron...

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Section: Introductionmentioning

confidence: 99%

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Resonant Nernst Effect in the Metallic and Field-Induced Spin Density Wave States of(TMTSF)2ClO4

et al. 2005

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“…Experiment [6] did not reveal these oscillations, however, the studied range of angles might not have been big enough to see the first oscillation [1]. The angular oscillations in the conductivity were predicted [7] and observed [8,9,1]. Two other models for the oscillations in the conductivity were later suggested [10].…”

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confidence: 98%

Theory of Thermodynamic Magnetic Oscillations in Quasi-One-Dimensional Conductors

Yakovenko¹

1993

Phys. Rev. Lett.

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The second order correction to free energy due to the interaction between electrons is calculated for a quasi-one-dimensional conductor exposed to a magnetic field perpendicular to the chains. It is found that specific heat, magnetization and torque oscillate when the magnetic field is rotated in the plane perpendicular to the chains or when the magnitude of magnetic filed is changed. This new mechanism of thermodynamic magnetic oscillations in metals, which is not related to the presence of any closed electron orbits, is applied to explain behavior of the organic conductor (TMTSF) 2 ClO 4 .

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“…Several related types of so-called angular magnetoresistance oscillations (AMRO) have been observed in these Q1D conductors, as well as in quasi-two-dimensional ones [1][2][3]. In Q1D, when the magnetic field is rotated about the orthogonal axes, a//x, b'//y and c * //z, seemingly different kinds of AMRO are observed, to wit: Lebed magic angle (LMA) resonances [4,5,6,7,8] for field rotated in the plane perpendicular to the one-dimensional chains (i.e. about…”

Section: Introductionmentioning

confidence: 99%

Multidimensional nature of molecular organic conductors revealed by angular magnetoresistance oscillations

Dhakal

Yoshino

et al. 2012

Synthetic Metals

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Angle-dependent magnetoresistance experiments on organic conductors exhibit a wide range of angular oscillations associated with the dimensionality and symmetry of the crystal structure and electron energy dispersion. In particular, characteristics associated with 1, 2, and 3-dimensional electronic motion are separately revealed when a sample is rotated through different crystal planes in a magnetic field. Originally discovered in the TMTSF-based conductors, these effects are particularly pronounced in the related system (DMET) 2 I 3 . Here, experimental and computational results for magnetoresistance oscillations in this material, over a wide range of magnetic field orientations, are presented in such a manner as to uniquely highlight this multidimensional behavior. The calculations employ the Boltzmann transport equation that incorporates the system's triclinic crystal structure, which allows for accurate estimates of the transfer integrals along the crystallographic axes, verifying the 1D, 2D and 3 D nature of (DMET) 2 I 3 , as well as crossovers between dimensions in the electronic behavior.

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Commensurability effect of magnetoresistance anisotropy in the quasi-one-dimensional conductor tetramethyltetraselenafulvalenium perchlorate, (TMTSF)2ClO

Cited by 153 publications

References 12 publications

Resonant Nernst Effect in the Metallic and Field-Induced Spin Density Wave States of(TMTSF)2ClO4

Resonant Nernst Effect in the Metallic and Field-Induced Spin Density Wave States of(TMTSF)2ClO4

Theory of Thermodynamic Magnetic Oscillations in Quasi-One-Dimensional Conductors

Multidimensional nature of molecular organic conductors revealed by angular magnetoresistance oscillations

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