scholarly journals Nonlinear thermoelectric effects in high-field superconductor-ferromagnet tunnel junctions

2016 ◽  
Vol 7 ◽  
pp. 1579-1585 ◽  
Author(s):  
Stefan Kolenda ◽  
Peter Machon ◽  
Detlef Beckmann ◽  
Wolfgang Belzig
Keyword(s):  
Heat Transport ◽  
Normal Metal ◽  
Hybrid Structures ◽  
Metal Nanostructures ◽  
Thermal Excitation ◽  
Thermoelectric Effects ◽  
Electron Hole ◽  
Metal Structures ◽  
Dc Bias ◽  
Microscopic Origin

Background: Thermoelectric effects result from the coupling of charge and heat transport and can be used for thermometry, cooling and harvesting of thermal energy. The microscopic origin of thermoelectric effects is a broken electron–hole symmetry, which is usually quite small in metal structures. In addition, thermoelectric effects decrease towards low temperatures, which usually makes them vanishingly small in metal nanostructures in the sub-Kelvin regime. Results: We report on a combined experimental and theoretical investigation of thermoelectric effects in superconductor/ferromagnet hybrid structures. We investigate the dependence of thermoelectric currents on the thermal excitation, as well as on the presence of a dc bias voltage across the junction. Conclusion: Large thermoelectric effects are observed in superconductor/ferromagnet and superconductor/normal-metal hybrid structures. The spin-independent signals observed under finite voltage bias are shown to be reciprocal to the physics of superconductor/normal-metal microrefrigerators. The spin-dependent thermoelectric signals in the linear regime are due to the coupling of spin and heat transport, and can be used to design more efficient refrigerators.

scholarly journals Thermoelectric current in a graphene Cooper pair splitter

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Z. B. Tan ◽  
A. Laitinen ◽  
N. S. Kirsanov ◽  
A. Galda ◽  
V. M. Vinokur ◽  
...  
Keyword(s):  
Cooper Pair ◽  
Theoretical Description ◽  
Seebeck Effect ◽  
Normal Metal ◽  
Electric Voltage ◽  
Power Generators ◽  
Metal Structures ◽  
Fundamental Phenomenon ◽  
Non Local ◽  
Cooper Pair Splitting

AbstractGeneration of electric voltage in a conductor by applying a temperature gradient is a fundamental phenomenon called the Seebeck effect. This effect and its inverse is widely exploited in diverse applications ranging from thermoelectric power generators to temperature sensing. Recently, a possibility of thermoelectricity arising from the interplay of the non-local Cooper pair splitting and the elastic co-tunneling in the hybrid normal metal-superconductor-normal metal structures was predicted. Here, we report the observation of the non-local Seebeck effect in a graphene-based Cooper pair splitting device comprising two quantum dots connected to an aluminum superconductor and present a theoretical description of this phenomenon. The observed non-local Seebeck effect offers an efficient tool for producing entangled electrons.

scholarly journals Plasmon-Induced Electrocatalysis with Multi-Component Nanostructures

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 43 ◽  
Author(s):  
Palaniappan Subramanian ◽  
Dalila Meziane ◽  
Robert Wojcieszak ◽  
Franck Dumeignil ◽  
Rabah Boukherroub ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Charge Carriers ◽  
Catalytic Reactions ◽  
Synthetic Methods ◽  
Metal Nanostructures ◽  
Electron Hole ◽  
Catalytic Systems ◽  
Electrochemical Catalysis ◽  
Electrochemically Active ◽  
Shed Light

Noble metal nanostructures are exceptional light absorbing systems, in which electron–hole pairs can be formed and used as “hot” charge carriers for catalytic applications. The main goal of the emerging field of plasmon-induced catalysis is to design a novel way of finely tuning the activity and selectivity of heterogeneous catalysts. The designed strategies for the preparation of plasmonic nanomaterials for catalytic systems are highly crucial to achieve improvement in the performance of targeted catalytic reactions and processes. While there is a growing number of composite materials for photochemical processes-mediated by hot charge carriers, the reports on plasmon-enhanced electrochemical catalysis and their investigated reactions are still scarce. This review provides a brief overview of the current understanding of the charge flow within plasmon-enhanced electrochemically active nanostructures and their synthetic methods. It is intended to shed light on the recent progress achieved in the synthesis of multi-component nanostructures, in particular for the plasmon-mediated electrocatalysis of major fuel-forming and fuel cell reactions.

A Mo/Au Bilayer Transition Edge Sensor Modified with Normal Metal Structures

2013 ◽  
Vol 176 (3-4) ◽  
pp. 337-343 ◽  
Author(s):  
G. Wang ◽  
V. Yefremenko ◽  
C. L. Chang ◽  
J. Mehl ◽  
V. Novosad ◽  
...  
Keyword(s):  
Transition Edge Sensor ◽  
Normal Metal ◽  
Metal Structures ◽  
Transition Edge

scholarly journals Nonlinear resonance of superconductor/normal metal structures to microwaves

2010 ◽  
Vol 82 (2) ◽  
Author(s):  
E. Kandelaki ◽  
A. F. Volkov ◽  
K. B. Efetov ◽  
V. T. Petrashov
Keyword(s):  
Nonlinear Resonance ◽  
Normal Metal ◽  
Metal Structures

scholarly journals Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions

2015 ◽  
Vol 383 ◽  
pp. 157-161 ◽  
Author(s):  
Shiro Kawabata ◽  
Andrey S. Vasenko ◽  
Asier Ozaeta ◽  
Sebastian F. Bergeret ◽  
Frank W.J. Hekking
Keyword(s):  
Heat Transport ◽  
Normal Metal ◽  
Electron Cooling ◽  
Spin Filter

scholarly journals Density of states anomalies in hybrid superconductor-ferromagnet-normal metal structures

JETP Letters ◽  
2005 ◽  
Vol 81 (4) ◽  
pp. 180-184 ◽  
Author(s):  
A. A. Golubov ◽  
M. Yu. Kupriyanov ◽  
M. Siegel
Keyword(s):  
Density Of States ◽  
Normal Metal ◽  
Metal Structures

scholarly journals Interplay of spin-orbit torque and thermoelectric effects in ferromagnet/normal-metal bilayers

2014 ◽  
Vol 90 (22) ◽  
Author(s):  
Can Onur Avci ◽  
Kevin Garello ◽  
Mihai Gabureac ◽  
Abhijit Ghosh ◽  
Andreas Fuhrer ◽  
...  
Keyword(s):  
Normal Metal ◽  
Spin Orbit ◽  
Thermoelectric Effects ◽  
Metal Bilayers
Sign in / Sign up

Export Citation Format

Share Document