# Thermoelectrics

Thermoelectrics are materials that can generate electricity from the application of a temperature gradient, or vice versa, through the thermoelectric effect. By exploiting this coupling between thermal and electrical properties, thermoelectric devices can be made that carry heat from a cold to a hot side (refrigeration) or that generate electricity from heat flows.

## Latest Research and Reviews

• Research | | open

### Grain Boundary Interfaces Controlled by Reduced Graphene Oxide in Nonstoichiometric SrTiO3-δ Thermoelectrics

• Jamil Ur Rahman
• , Nguyen Van Du
• , Woo Hyun Nam
• , Weon Ho Shin
• , Kyu Hyoung Lee
• , Won-Seon Seo
• , Myong Ho Kim
•  & Soonil Lee
• Reviews | | open

### New approach to waste-heat energy harvesting: pyroelectric energy conversion

With two-thirds of the primary energy produced every year rejected as heat, the need for techniques that harvest low-grade waste heat with higher fractions of Carnot efficiency is clear. This article develops a perspective on pyroelectric energy conversion (PEC), that leverages the intrinsic coupling between electrical polarization and temperature in pyroelectric materials where a change in temperature begets a flow of electrical charge. This article will shed light on what thermo-electrical properties are crucial for PEC and the routes to enhance them. Subsequent discussion will cover thermodynamic cycles and device design rules to extract maximum work and power.

• Shishir Pandya
• , Gabriel Velarde
• , Lei Zhang
• , Joshua D. Wilbur
• , Andrew Smith
• , Brendan Hanrahan
• , Chris Dames
•  & Lane W. Martin
• Research | | open

### Synergistic effect of band convergence and carrier transport on enhancing the thermoelectric performance of Ga doped Cu2Te at medium temperatures

• Sayan Sarkar
• , Prashant K. Sarswat
• , Shrikant Saini
• , Paolo Mele
•  & Michael L. Free
• Reviews | | open

### Computational strategies for design and discovery of nanostructured thermoelectrics

• Shiqiang Hao
• , Vinayak P. Dravid
• , Mercouri G. Kanatzidis
•  & Christopher Wolverton
• Research | | open

### Intrinsic anharmonic localization in thermoelectric PbSe

To optimize the performance of lead chalcogenides for thermoelectric applications, strategies to further reduce the crystal’s thermal conductivity is required. Here, the authors discover anharmonic localized vibrations in PbSe crystals for optimizing the crystal’s vibrational transport properties.

• M. E. Manley
• , O. Hellman
• , N. Shulumba
• , A. F. May
• , P. J. Stonaha
• , J. W. Lynn
• , V. O. Garlea
• , A. Alatas
• , R. P. Hermann
• , J. D. Budai
• , H. Wang
• , B. C. Sales
•  & A. J. Minnich
• Research | | open

### Anomalous Nernst effect beyond the magnetization scaling relation in the ferromagnetic Heusler compound Co2MnGa

We report a high anomalous Nernst thermopower ( \$\$S_{yx}^A\$\$ $S y x A$ ) -value of ~6.0 µV K−1 at room temperature in the ferromagnetic topological Heusler compound Co2MnGa. The measured value is seven-times larger than any anomalous Nernst thermopower value ever reported for a conventional ferromagnet. The high anomalous Nernst effect originates from a large net Berry curvature near the Fermi level associated with nodal lines and Weyl points.

• Satya N. Guin
• , Kaustuv Manna
• , Jonathan Noky
• , Sarah J. Watzman
• , Chenguang Fu
• , Nitesh Kumar
• , Walter Schnelle
• , Chandra Shekhar
• , Yan Sun
• , Johannes Gooth
•  & Claudia Felser

## News and Comment

• Research Highlights |

### Going with the flow (of heat)

• Matthew Parker
• News and Views |

### Microthermoelectric devices keep their cool

• Owain Vaughan
• News and Views |

### Next step in manufacturing

Thermoelectric devices convert heat flows into electricity. Researchers recently demonstrated that thermoelectric materials can be produced in good quality by 3D printing, enabling a low-cost production process in the near future.

• Jan D. Koenig
Nature Energy 3, 259-260
• News and Views |

### Bring on the heat

One third of industrial processes occur at high temperatures above 1300 K, but current methods of waste heat recovery at these temperatures are limited. Now, reduced graphene oxide is shown to be a highly efficient and reliable thermoelectric material up to 3000 K.

• Gabi Schierning
Nature Energy 3, 92-93
• Research Highlights |

### Thermoelectric avenue

• James Gallagher
Nature Energy 2, 834
• News and Views |

### Spin thermal effects: A new member of the Hall family

The spin Nernst effect — a spin accumulation in a ferromagnet in the direction normal to an applied thermal gradient and external magnetic field — has been experimentally demonstrated.

• Joseph P. Heremans
Nature Materials 16, 968-969