Archival Journals Publications

E. Ou, Li, X., Lee, S., Watanabe, K., Taniguchi, T., and Shi, L., “Four-Probe Measurement of Thermal Transport in Suspended Few-layer Graphene with Polymer Residue,” Journal of Heat Transfer, vol. 141, pp. 061601, 2019. Publisher's Version
B. Smith, Lindsay, L., Kim, J., Ou, E., Huang, R., and Shi, L., “Phonon interaction with ripples and defects in thin layered molybdenum disulfide,” Applied Physics Letters, vol. 114, pp. 221902, 2019. Publisher's Version
L. Shi, “Nonresistive heat transport by collective phonon flow,” Science, vol. 364, pp. 332–333, 2019. Publisher's Version
X. Chen, Carrete, J., Sullivan, S., van Roekeghem, A., Li, Z., Li, X., Zhou, J., Mingo, N., and Shi, L., “Coupling of spinons with defects and phonons in the spin chain compound Ca2CuO3,” Physical Review Letters, vol. 122, pp. 185901, 2019. Publisher's Version
E. Fleming, Du, F., Ou, E., Dai, L., and Shi, L., “Thermal conductivity of carbon nanotubes grown by catalyst-free chemical vapor deposition in nanopores,” Carbon, vol. 145, pp. 195-200, 2019. Publisher's VersionAbstract
A graphitic structure was synthesized by catalyst-free chemical vapor deposition on anodized aluminum oxide (AAO) templates using acetylene as the carbon source at a temperature of 620 °C. The AAO template was removed by chemical etching, which yielded a three-dimensional structure featuring planar layers seamlessly joined together by nanotube pillars via continuous carbon-carbon bonding. Raman and transmission electron spectroscopy measurements reveal that the deposited carbon is nanocrystalline graphite with a thickness of about 10 nm. Carbon nanotubes were isolated from the three-dimensional nano-pillar graphitic structure and measured with a thermal four-probe method to obtain the intrinsic thermal conductance. Discrete modulated heating and Fourier transform analysis were used to improve the signal to noise ratio of the thermal measurement of the low-conductance nanostructure. The measured thermal conductivity of the nanotube wall increased with increasing temperature and was 3.9 ± 0.3 Wm−1K−1 at room temperature. Both the temperature dependence and the magnitude are consistent with the nanocrystalline graphitic structure.
J. Chen, Hamann, D. M., Choi, D. S., Poudel, N., Shen, L., Shi, L., Johnson, D. C., and Cronin, S. B., “Enhanced Cross-plane Thermoelectric Transport of Rotationally-disordered SnSe2 via Se Vapor Annealing,” Nano Letters, vol. 18, no. 11, pp. 6876–6881, 2018. Publisher's Version
J. Chen, Kim, J., Poudel, N., Hou, B., Shen, L., Shi, H., Shi, L., and Cronin, S., “Enhanced thermoelectric efficiency in topological insulator Bi2Te3 nanoplates via atomic layer deposition-based surface passivation,” Applied Physics Letters, vol. 113, pp. 083904, 2018. Publisher's Version
F. Tian, Song, B., Chen, X., Ravichandran, N. K., Lv, Y., Chen, K., Sullivan, S., Kim, J., Zhou, Y., Liu, T. - H., Goni, M., Ding, Z., Sun, J., Gamage, G. A. G. U., Sun, H., Ziyaee, H., Huyan, S., Deng, L., Zhou, J., Schmidt, A. J., Chen, S., Chu, C. - W., Huang, P. Y., Broido, D., Shi, L., Chen, G., and Ren, Z., “Unusual high thermal conductivity in boron arsenide bulk crystals,” Science, vol. 361, pp. 582–585, 2018. Publisher's VersionAbstract
Conventional theory predicts that ultrahigh lattice thermal conductivity can only occur in crystals composed of strongly bonded light elements, and that it is limited by anharmonic three-phonon processes. We report experimental evidence that departs from these long-held criteria. We measured a local room-temperature thermal conductivity exceeding 1000 watts per meter-kelvin and an average bulk value reaching 900 watts per meter-kelvin in bulk boron arsenide (BAs) crystals, where boron and arsenic are light and heavy elements, respectively. The high values are consistent with a proposal for phonon-band engineering and can only be explained by higher-order phonon processes. These findings yield insight into the physics of heat conduction in solids and show BAs to be the only known semiconductor with ultrahigh thermal conductivity.
J. Xing, Chen, X., Zhou, Y., Culbertson, J. C., Freitas, J. A., Glaser, E. R., Zhou, J., Shi, L., and Ni, N., “Multimillimeter-sized cubic boron arsenide grown by chemical vapor transport via a tellurium tetraiodide transport agent,” Applied Physics Letters, vol. 112, pp. 261901, 2018. Publisher's Version
E. Fleming, Kholmanov, I., and Shi, L., “Enhanced specific surface and thermal conductivity in ultrathin graphite foams grown by chemical vapor deposition on sintered nickel powder templates,” Carbon, vol. 136, pp. 380-386, 2018. Publisher's Version
D. S. Choi, Poudel, N., Park, S., Akinwande, D., Cronin, S. B., Watanabe, K., Taniguchi, T., Yao, Z., and Shi, L., “Large Reduction of Hot Spot Temperature in Graphene Electronic Devices with Heat-Spreading Hexagonal Boron Nitride,” ACS Applied Materials & Interfaces, vol. 10 , pp. 11101–11107, 2018. Publisher's Version
J. Kim, Fleming, E., Zhou, Y., and Shi, L., “Comparison of four-probe thermal and thermoelectric transport measurements of thin films and nanostructures with microfabricated electro-thermal transducers,” Journal of Physics D: Applied Physics, vol. 51, pp. 103002, 2018. Publisher's Version
K. S. Olsson, An, K., Ma, X., Sullivan, S., Venu, V., Tsoi, M., Zhou, J., Shi, L., and Li, X., “Temperature-dependent Brillouin light scattering spectra of magnons in yttrium iron garnet and permalloy,” Phys. Rev. B, vol. 96, pp. 024448, 2017. Publisher's Version
A. Weathers, Carrete, J., DeGrave, J. P., Higgins, J. M., Moore, A. L., Kim, J., Mingo, N., Jin, S., and Shi, L., “Glass-like thermal conductivity in nanostructures of a complex anisotropic crystal,” Phys. Rev. B, vol. 96, pp. 214202, 2017. Publisher's Version
X. Chen, Jarvis, K., Sullivan, S., Li, Y., Zhou, J., and Shi, L., “Effects of grain boundaries and defects on anisotropic magnon transport in textured Sr14Cu24O41,” Phys. Rev. B, vol. 95, pp. 144310, 2017. Publisher's Version
N. Poudel, Liang, S. - J., Choi, D., Hou, B., Shen, L., Shi, H., Ang, L. K., Shi, L., and Cronin, S., “Cross-plane Thermoelectric and Thermionic Transport across Au/h-BN/Graphene Heterostructures,” Scientific Reports, vol. 7, pp. 14148, 2017. Publisher's Version
J. Zhang, Jia, S., Kholmanov, I., Dong, L., Er, D., Chen, W., Guo, H., Jin, Z., Shenoy, V. B., Shi, L., and Lou, J., “Janus Monolayer Transition Metal Dichalcogenides,” ACS Nano, vol. 11, pp. 8192 , 2017. Publisher's Version
S. Sullivan, Vallabhaneni, A. K., Kholmanov, I., Ruan, X., Murthy, J., and Shi, L., “Optical generation and detection of local non-equilibrium phonons in suspended graphene,” Nano Letters, vol. 17, pp. 2049–2056 , 2017. Publisher's Version
D. Choi, Poudel, N., Cronin, S. B., and Shi, L., “Effects of basal-plane thermal conductivity and interface thermal conductance on the hot spot temperature in graphene electronic devices,” Applied Physics Letters, vol. 110, pp. 073104, 2017. Publisher's Version
Z. Li, Bauers, S. R., Poudel, N., Hamann, D., Wang, X., Choi, D. S., Esfarjani, K., Shi, L., Johnson, D. C., and Cronin, S. B., “Cross-Plane Seebeck Coefficient Measurement of Misfit Layered Compounds (SnSe)n(TiSe2)n (n = 1,3,4,5),” Nano Letters, vol. 17, pp. 1978–1986 , 2017. Publisher's Version