Thermal Conductivity of HfTe5: A Critical Revisit

Feng, Tianli1,2,3; Wu, Xuewang4; Yang, Xiaolong5,6; Wang, Peipei7,8; Zhang, Liyuan7,8; Du, Xu9; Wang, Xiaojia4,10; Pantelides, Sokrates T.1,2,3

2019-12-09

10.1002/adfm.201907286

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

Hafnium pentatelluride (HfTe5) has attracted extensive interest due to its exotic electronic, optical, and thermal properties. As a highly anisotropic crystal (layered structure with in-plane chains), it has highly anisotropic electrical-transport properties, but the anisotropy of its thermal-transport properties has not been established. Here, accurate experimental measurements and theoretical calculations are combined to resolve this issue. Time-domain thermoreflectance measurements find a highly anisotropic thermal conductivity, 28:1:8, with values of 11.3 +/- 2.2, 0.41 +/- 0.04, and 3.2 +/- 2.0 W m(-1) K-1 along the in-plane a-axis, through-plane b-axis, and in-plane c-axis, respectively. This anisotropy is even larger than what was recently established for ZrTe5 (12:1:6), but the individual values are somewhat higher, even though Zr has a smaller atomic mass than Hf. Density-functional-theory calculations predict thermal conductivities in good agreement with the experimental data, provide comprehensive insights into the results, and reveal the origin of the apparent anomaly of the relative thermal conductivities of the two pentatellurides. These results establish that HfTe5 and ZrTe5, and by implication their alloys, have highly anisotropic and ultralow through-plane thermal conductivities, which can provide guidance for the design of materials for new directional-heat-management applications and potentially other thermal functionalities.

pentatellurides phonons thermal conductivities time-domain thermoreflectance

SCI ; EI

英语

NI论文

其他

Shenzhen Fundamental subject research Program[JCYJ20170817110751776] ; Shenzhen Fundamental subject research Program[JCYJ20170307105434022]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000501316600001

WILEY-V C H VERLAG GMBH

20195107853199

Anisotropy ; Crystal structure ; Density functional theory ; Hafnium alloys ; Hafnium compounds ; Phonons ; Thermal conductivity ; Thermal insulating materials ; Time domain analysis ; Zircaloy

Heat Insulating Materials:413.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Mathematics:921 ; Classical Physics; Quantum Theory; Relativity:931 ; Crystal Lattice:933.1.1

MATERIALS SCIENCE

Web of Science

1.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
2.Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA
3.Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
4.Univ Minnesota, Dept Mech Engn, Minneapolis, MN 55455 USA
5.Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, Xian 710049, Shaanxi, Peoples R China
6.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China
7.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
8.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
9.SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
10.Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

Feng, Tianli,Wu, Xuewang,Yang, Xiaolong,et al. Thermal Conductivity of HfTe5: A Critical Revisit[J]. ADVANCED FUNCTIONAL MATERIALS,2019,30(5).

Feng, Tianli.,Wu, Xuewang.,Yang, Xiaolong.,Wang, Peipei.,Zhang, Liyuan.,...&Pantelides, Sokrates T..(2019).Thermal Conductivity of HfTe5: A Critical Revisit.ADVANCED FUNCTIONAL MATERIALS,30(5).

Feng, Tianli,et al."Thermal Conductivity of HfTe5: A Critical Revisit".ADVANCED FUNCTIONAL MATERIALS 30.5(2019).