Skip to main content

Understanding the evolution of anomalous anharmonicity in Bi2Te3-xSex

Author(s): Tian, Yao; Jia, Shuang; Cava, Robert Joseph; Zhong, Ruidan; Schneeloch, John; et al

To refer to this page use:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorTian, Yao-
dc.contributor.authorJia, Shuang-
dc.contributor.authorCava, Robert Joseph-
dc.contributor.authorZhong, Ruidan-
dc.contributor.authorSchneeloch, John-
dc.contributor.authorGu, Genda-
dc.contributor.authorBurch, Kenneth S.-
dc.identifier.citationTian, Yao, Jia, Shuang, Cava, Robert J., Zhong, Ruidan, Schneeloch, John, Gu, Genda, Burch, Kenneth S. (2017). Understanding the evolution of anomalous anharmonicity in. Physical Review B, 95 (9), 10.1103/PhysRevB.95.094104en_US
dc.descriptionPhysical Review B. Volume 95, Issue 9, 8 March 2017, Article number 094104.en_US
dc.description.abstractThe anharmonic effect in thermoelectrics has been a central topic for decades in both condensed matter physics and material science. However, despite the long-believed strong and complex anharmonicity in the Bi2Te3-xSex series, experimental verification of anharmonicity and its evolution with doping remains elusive. We fill this important gap with high-resolution, temperature-dependent Raman spectroscopy in high-quality single crystals of Bi2Te3, Bi2Te2Se, and Bi2Se3 over the temperature range from 4 to 293 K. Klemens's model was employed to explain the renormalization of their phonon linewidths. The phonon energies of Bi2Se3 and Bi2Te3 are analyzed in detail from three aspects: lattice expansion, cubic anharmonicity, and quartic anharmonicity. For the first time, we explain the evolution of anharmonicity in various phonon modes and across the series. In particular, we find that the interplay between cubic and quartic anharmonicity is governed by their distinct dependence on the phonon density of states, providing insights into anomalous anharmonicity designing of new thermoelectrics. © 2017 American Physical Society.en_US
dc.format.extent95.9:094104-1 - 094104-7en_US
dc.relation.ispartofPhysical Review Ben_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleUnderstanding the evolution of anomalous anharmonicity in Bi2Te3-xSexen_US
dc.typeJournal Articleen_US

Files in This Item:
File Description SizeFormat 
PhysRevB.95.094104.pdf517.16 kBAdobe PDFView/Download
medium (85).png153.94 kBimage/pngThumbnail

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.