Searching the Resource Information Network
Are you sure you want to leave this community? Leaving the community will revoke any permissions you have been granted in this community.
Thermoelectricity allows direct conversion between heat and electricity, providing alternatives for green energy technologies. Despite these advantages, for most materials the energy conversion efficiency is limited by the tendency for the electrical and thermal conductivity to be proportional to each other and the Seebeck coefficient to be small. Here we report counter examples, where the heavy fermion compounds YbTM 2Zn20 (TM = Co, Rh, Ir) exhibit enhanced thermoelectric performance including a large power factor (PF = 74 μW/cm-K2; TM = Ir) and a high figure of merit (ZT = 0.07; TM = Ir) at 35 K. The combination of the strongly hybridized electronic state originating from the Yb f-electrons and the novel structural features (large unit cell and possible soft phonon modes) leads to high power factors and small thermal conductivity values. This demonstrates that with further optimization these systems could provide a platform for the next generation of low temperature thermoelectric materials.
Pubmed ID: 31172031
Publication data is provided by the National Library of Medicine ® and PubMed ®. Data is retrieved from PubMed ® on a weekly schedule. For terms and conditions see the National Library of Medicine Terms and Conditions.
Facility offers array of solid state, solution state, MRI/S (animal and human), MR microscopy and diffusion capabilities and techniques. Among their machines is 900 MHz 105 mm bore magnet. Techniques and instruments are available at two different MagLab facilities in Florida, NMR-MRI/S Facility at MagLab headquarters near Florida State University in Tallahassee and Advanced Magnetic Resonance Imaging and Spectroscopy Facility (AMRIS) housed within McKnight Brain Institute at University of Florida in Gainesville.
View all literature mentions