Thermoelectric effects in the superconducting state

Ginzburg, Vitalii L.

doi:10.3367/ufnr.0161.199102a.0001

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…This becomes paradigmatic, in superconducting systems, where it should be expected that PH symmetry and the dissipationless flow of Cooper pairs would implicitly limit any thermoelectric effect. Notwithstanding, a few works [6,7] anticipated that even superconducting systems could exhibit a thermoactive behaviour. Along this route, theoretical [8][9][10][11][12][13][14][15][16] and experimental [17][18][19] research has shown that nonlocality or phase coherence may still trigger intriguing thermoelectric phenomena in superconducting and hybrid systems.…”

Section: Introductionmentioning

confidence: 99%

Bipolar Thermoelectricity in Bilayer-Graphene/Superconductor Tunnel Junctions

Bernazzani¹,

Marchegiani²,

Giazotto³

et al. 2022

Preprint

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We investigate the thermoelectric properties of a hybrid nanodevice composed by a 2D carbonbased material and a superconductor. This system presents nonlinear bipolar thermoelectricity as induced by the spontaneous breaking of the Particle-Hole (PH) symmetry in a tunnel junction between a BiLayer Graphene (BLG) and a Bardeen-Cooper-Schrieffer (BCS) superconductor. In this scheme, the nonlinear thermoelectric effect, predicted and observed in SIS' junctions is not affected by the competitive effect of the Josephson coupling. From a fundamental perspective, the most intriguing feature of this effect is its bipolarity, that poses new issues on the nature of thermoelectricity in solid state systems. The capability to open and control the BLG gap guarantees improved thermoelectric performances, that reach up to 1 mV/K regarding the Seebeck coefficient and a power density of 1 nW/µm 2 for temperature gradients of tens of Kelvins. Furthermore, the externally controlled gating can also dope the BLG, which is otherwise intrinsically PH symmetric, giving us the opportunity to investigate the bipolar thermoelectricity even in presence of a controlled suppression of the PH symmetry. The predicted robustness of this system could foster further experimental investigations and applications in the near future, thanks to the available techniques of nano-fabrication.

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Section: Introductionmentioning

confidence: 99%

Bipolar Thermoelectricity in Bilayer-Graphene/Superconductor Tunnel Junctions

Bernazzani¹,

Marchegiani²,

Giazotto³

et al. 2022

Preprint

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“…Transition temperature vs. discovery year for common superconductors, taken from Ni Ni[75].high temperature superconductor[68,69]. Unlike conventional superconductors, which are relatively good conductors, LaBaCuO is a poor conductor in the normal state.…”

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confidence: 99%

Angle-resolved photoemission spectroscopy (ARPES) studies of cuprate superconductors

Palczewski

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We study the electronic structures of two single layer superconducting cuprates, Tl 2 Ba 2 CuO 6+δ (Tl2201) and (Bi 1.35 Pb 0.85)(Sr 1.47 La 0.38)CuO 6+δ (Bi2201) which have very different maximum critical temperatures (95 K and 35 K respectively) using Angular Resolved Photoemission Spectroscopy (ARPES). We are able to identify two main differences in their electronic properties. First, the shadow band that is present in double layer and low T c,max single layer cuprates is absent in Tl2201. Recent studies have linked the shadow band to structural distortions in the lattice and the absence of these in Tl2201 may be a contributing factor in its T c,max. Second, Tl2201's Fermi surface (FS) contains long straight parallel regions near the antinode, while in Bi2201 the antinodal region is much more rounded. Since the size of the superconducting gap

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Superconductivity and Superfluidity

2009

On Superconductivity and Superfluidity

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Thermoelectric effects in the superconducting state

Cited by 6 publications

References 26 publications

Bipolar Thermoelectricity in Bilayer-Graphene/Superconductor Tunnel Junctions

Bipolar Thermoelectricity in Bilayer-Graphene/Superconductor Tunnel Junctions

Angle-resolved photoemission spectroscopy (ARPES) studies of cuprate superconductors

Superconductivity and Superfluidity

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