Kagome modes, a new route to ultralow thermal conductivity? / Voneshen, D. J.; Hatnean, M. Ciomaga; Perring, T. G.; Walker, H. C.; Refson, K.; Balakrishnan, G.; Goff, J. P.

In: ArXiv.org, 17.09.2018.

Research output: Contribution to journalArticle

Published

### Standard

Kagome modes, a new route to ultralow thermal conductivity? / Voneshen, D. J.; Hatnean, M. Ciomaga; Perring, T. G.; Walker, H. C.; Refson, K.; Balakrishnan, G.; Goff, J. P.

In: ArXiv.org, 17.09.2018.

Research output: Contribution to journalArticle

### Harvard

Voneshen, DJ, Hatnean, MC, Perring, TG, Walker, HC, Refson, K, Balakrishnan, G & Goff, JP 2018, 'Kagome modes, a new route to ultralow thermal conductivity?', ArXiv.org.

### APA

Voneshen, D. J., Hatnean, M. C., Perring, T. G., Walker, H. C., Refson, K., Balakrishnan, G., & Goff, J. P. (2018). Kagome modes, a new route to ultralow thermal conductivity? ArXiv.org.

### Vancouver

Voneshen DJ, Hatnean MC, Perring TG, Walker HC, Refson K, Balakrishnan G et al. Kagome modes, a new route to ultralow thermal conductivity? ArXiv.org. 2018 Sep 17.

### Author

Voneshen, D. J. ; Hatnean, M. Ciomaga ; Perring, T. G. ; Walker, H. C. ; Refson, K. ; Balakrishnan, G. ; Goff, J. P. / Kagome modes, a new route to ultralow thermal conductivity?. In: ArXiv.org. 2018.

### BibTeX

@article{733b7ff7ff0b41d79d32b79b2a29b8f4,
title = "Kagome modes, a new route to ultralow thermal conductivity?",
abstract = "From next generation gas turbines to scavenging waste heat from car exhausts, finding new materials with ultra-low thermal conductivity ($\kappa$) has the potential to lead to large gains in device efficiency. Crystal structures with inherently low $\kappa$ are consequently desirable, but candidate materials are rare and often difficult to make. Using first principles calculations and inelastic neutron scattering we have studied the pyrochlore La$_2$Zr$_2$O$_7$ which has been proposed as a next generation thermal barrier. We find that there is a highly anharmonic, approximately flat, vibrational mode associated with the kagome planes. Our results suggest that this mode is responsible for the low thermal conductivity observed in the pyrochlores and that kagome compounds will be a fruitful place to search for other low $\kappa$ materials.",
keywords = "cond-mat.mtrl-sci",
author = "Voneshen, {D. J.} and Hatnean, {M. Ciomaga} and Perring, {T. G.} and Walker, {H. C.} and K. Refson and G. Balakrishnan and Goff, {J. P.}",
year = "2018",
month = sep,
day = "17",
language = "English",
journal = "ArXiv.org",

}

### RIS

TY - JOUR

T1 - Kagome modes, a new route to ultralow thermal conductivity?

AU - Voneshen, D. J.

AU - Hatnean, M. Ciomaga

AU - Perring, T. G.

AU - Walker, H. C.

AU - Refson, K.

AU - Balakrishnan, G.

AU - Goff, J. P.

PY - 2018/9/17

Y1 - 2018/9/17

N2 - From next generation gas turbines to scavenging waste heat from car exhausts, finding new materials with ultra-low thermal conductivity ($\kappa$) has the potential to lead to large gains in device efficiency. Crystal structures with inherently low $\kappa$ are consequently desirable, but candidate materials are rare and often difficult to make. Using first principles calculations and inelastic neutron scattering we have studied the pyrochlore La$_2$Zr$_2$O$_7$ which has been proposed as a next generation thermal barrier. We find that there is a highly anharmonic, approximately flat, vibrational mode associated with the kagome planes. Our results suggest that this mode is responsible for the low thermal conductivity observed in the pyrochlores and that kagome compounds will be a fruitful place to search for other low $\kappa$ materials.

AB - From next generation gas turbines to scavenging waste heat from car exhausts, finding new materials with ultra-low thermal conductivity ($\kappa$) has the potential to lead to large gains in device efficiency. Crystal structures with inherently low $\kappa$ are consequently desirable, but candidate materials are rare and often difficult to make. Using first principles calculations and inelastic neutron scattering we have studied the pyrochlore La$_2$Zr$_2$O$_7$ which has been proposed as a next generation thermal barrier. We find that there is a highly anharmonic, approximately flat, vibrational mode associated with the kagome planes. Our results suggest that this mode is responsible for the low thermal conductivity observed in the pyrochlores and that kagome compounds will be a fruitful place to search for other low $\kappa$ materials.

KW - cond-mat.mtrl-sci

M3 - Article

JO - ArXiv.org

JF - ArXiv.org

ER -