Efficiency bounds on thermoelectric transport in magnetic fields: The role of inelastic processes
Efficiency bounds on thermoelectric transport in magnetic fields: The role of inelastic processes
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DOI：
10.1103/physrevb.94.121402
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发表时间：
2016-09
影响因子：
3.7
通讯作者：
Kaoru Yamamoto;O. Entin-Wohlman;A. Aharony;N. Hatano
中科院分区：
文献类型：
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作者：
Kaoru Yamamoto;O. Entin-Wohlman;A. Aharony;N. Hatano
我们研究了一个有效的二端热电器件的效率下打破时间反演对称性。该设置是从一个三端热电装置，包括一个热终端和两个电子接触，在磁场下。我们发现，打破时间反演对称性的存在下的非弹性的电子-声子过程可以显着提高品质因数提供电力通过从声子浴提供热量，超越了一个用于生产电力通过投资热功率从电子热流。这种器件的效率受原始三端结的熵产生的非负性的限制。在最大功率下的效率可以非常接近卡诺效率，但是随后电功率消失。
We examine the efficiency of an effective two-terminal thermoelectric device under broken time-reversal symmetry. The setup is derived from a three-terminal thermoelectric device comprising a thermal terminal and two electronic contacts, under a magnetic field. We find that breaking time-reversal symmetry in the presence of the inelastic electron-phonon processes can significantly enhance the figure of merit for delivering electric power by supplying heat from a phonon bath, beyond the one for producing the electric power by investing thermal power from the electronic heat current. The efficiency of such a device is bounded by the non-negativity of the entropy production of the original three-terminal junction. The efficiency at maximal power can be quite close to the Carnot efficiency, but then the electric power vanishes.