Colossal Seebeck Coefficient of Hopping Electrons in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>TMTSF</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mtext> </mml:mtext><mml:mrow><mml:msub><mml:mrow><mml:mi>PF</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:mrow></mml:math>

Machida, Yo; Lin, Xin; Kang, W.; Izawa, Keisuke; Behnia, Kamran

doi:10.1103/physrevlett.116.087003

Cited by 18 publications

(16 citation statements)

References 45 publications

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“…The interest of the Aubry phase is related to high thermodynamic properties appearing in this phase. Thus we show that one can reach in this phase the high values of Seebeck coefficient S ≈ 50k B /e ≈ 4400µV/K which approaches to the record experimental values S ≈ 400k B /e observed in quasi-one-dimensional materials [44] and with two-dimensional electron gas in small disordered samples with S ∼ 50k B /e [45]. Even more remarkable is that in this phase the figure of merit can be as such high as ZT ≈ 8 being above the record experimental values [34].…”

Section: Discussionsupporting

confidence: 81%

Thermoelectricity of cold ions in optical lattices

Zhirov¹,

Lages²,

Shepelyansky³

2019

Eur. Phys. J. D

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We study analytically and numerically the thermoelectric properties of cold ions placed in an optical lattice. Our results show that the transition from sliding to pinned phase takes place at a certain critical amplitude of lattice potential being similar to the Aubry transition for the Frenkel-Kontorova model. We show that this critical amplitude is proportional to the cube of ion density that allows to perform experimental realization of this system at moderate lattice amplitudes. We show that the Aubry phase is characterized by the dimensionless Seebeck coefficient about 50 and the figure of merit being around 8. We propose possible experimental investigations of such system with cold ions and argue that the experiments with electrons on liquid helium surface can also help to understand its unusual properties. The obtained results represent also a challenge for modern methods of quantum chemistry and material science. arXiv:1901.09588v1 [cond-mat.quant-gas]

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Section: Discussionsupporting

confidence: 81%

Thermoelectricity of cold ions in optical lattices

Zhirov¹,

Lages²,

Shepelyansky³

2019

Eur. Phys. J. D

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“…This has been exemplified both experimentally and theoretically for quantum critical points in heavy fermions [1][2][3][4][5] , pnictides 6 , and for hole [7][8][9][10] , and electron-doped 11,12 cuprates. In organic superconductors like the Bechgaard salts (TMTSF) 2 X series, also known to exhibit quantum criticality, the measurements of the Seebeck coefficient have been the subject of numerous reports following their discovery [13][14][15][16][17][18][19] , and this, until very recently 20 . However, these works have found very little theoretical echo as to the possible part played by quantum fluctuations in the thermoelectric response seen in these correlated quasi-one dimensional (quasi-1D) metals.…”

Section: Introductionmentioning

confidence: 99%

Seebeck coefficient in correlated low-dimensional organic metals

Shahbazi

Bourbonnais

2016

Phys. Rev. B

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We study the influence of inelastic electron-electron scattering on the temperature variation of the Seebeck coefficient in the normal phase of quasi-one-dimensional organic superconductors. The theory is based on the numerical solution of the semi-classical Boltzmann equation for which the collision integral equation is solved with the aid of the electronic umklapp scattering vertex calculated by the renormalization group method. We show that the one-loop renormalization group flow of momentum and temperature dependent umklapp scattering, in the presence of nesting alterations of the Fermi surface, introduce electron-hole asymmetry in the energy dependence of the anisotropic scattering time. This is responsible for the enhancement of the Seebeck coefficient with respect to the band T -linear prediction and even its sign reversal around the quantum critical point of the phase diagram, namely where the interplay between antiferromagnetism and superconductivity along with the strength of spin fluctuations are the strongest. Comparison of the results with available data on low dimensional organic superconductors is presented and critically discussed.

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“…The maximal value of S ∼ 12 obtained in this study is still smaller than the extreme values of S obtained in certain experiments. Thus in experiments with quasione-dimensional conductor (TMTSF) 2 PF 6 [37] as high as S = 400k B /e ≈ 35mV /K value had been reached at low temperatures (see Fig. 3 in [37]).…”

Section: Discussionmentioning

confidence: 94%

Thermoelectric properties of Wigner crystal in two-dimensional periodic potential

Zakharov¹,

Demidov²,

Shepelyansky³

2020

Eur. Phys. J. B

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We study numerically transport and thermoelectric properties of electrons placed in a twodimensional (2D) periodic potential. Our results show that the transition from sliding to pinned phase takes place at a certain critical amplitude of lattice potential being similar to the Aubry transition for the one-dimensional Frenkel-Kontorova model. We show that the 2D Aubry pinned phase is characterized by high values of Seebeck coefficient S ≈ 12. At the same time we find that the value of Seebeck coefficient is significantly influenced by the geometry of periodic potential. We discuss possibilities to test the properties of 2D Aubry phase with electrons on a surface of liquid helium. PACS. XX.XX.XX No PACS code givenNowadays the needs of efficient energy usage stimulated extensive investigations of various materials with high characteristics of thermoelectricity as reviewed in [15, arXiv:1910.12946v1 [cond-mat.mes-hall]

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Colossal Seebeck Coefficient of Hopping Electrons in(TMTSF)2 PF6

Cited by 18 publications

References 45 publications

Thermoelectricity of cold ions in optical lattices

Thermoelectricity of cold ions in optical lattices

Seebeck coefficient in correlated low-dimensional organic metals

Thermoelectric properties of Wigner crystal in two-dimensional periodic potential

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