TY - JOUR
T1 - Classical nernst engine
AU - Stark, Julian
AU - Brandner, Kay
AU - Saito, Keiji
AU - Seifert, Udo
PY - 2014/4/7
Y1 - 2014/4/7
N2 - We introduce a simple model for an engine based on the Nernst effect. In the presence of a magnetic field, a vertical heat current can drive a horizontal particle current against a chemical potential. For a microscopic model invoking classical particle trajectories subject to the Lorentz force, we prove a universal bound 3-22≃0.172 for the ratio between the maximum efficiency and the Carnot efficiency. This bound, as the slightly lower one 1/6 for efficiency at maximum power, can indeed be saturated for a large magnetic field and small fugacity.
AB - We introduce a simple model for an engine based on the Nernst effect. In the presence of a magnetic field, a vertical heat current can drive a horizontal particle current against a chemical potential. For a microscopic model invoking classical particle trajectories subject to the Lorentz force, we prove a universal bound 3-22≃0.172 for the ratio between the maximum efficiency and the Carnot efficiency. This bound, as the slightly lower one 1/6 for efficiency at maximum power, can indeed be saturated for a large magnetic field and small fugacity.
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U2 - 10.1103/PhysRevLett.112.140601
DO - 10.1103/PhysRevLett.112.140601
M3 - Article
AN - SCOPUS:84898476497
SN - 0031-9007
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 140601
ER -