Archival Journals Publications

2017
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
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
P. Jurney, Agarwal, R., Singh, V., Choi, D., Roy, K., Sreenivasan, S. V., and Shi, L., “Unique size and shape-dependent uptake behaviors of non-spherical nanoparticles by endothelial cells due to a shearing flow,” Journal of Controlled Release, vol. 245, pp. 170–176 , 2017. Publisher's Version
B. Smith, Vermeersch, B., Carrete, J., Ou, E., Kim, J., Mingo, N., Akinwande, D., and Shi, L., “Temperature and Thickness Dependences of the Anisotropic In-Plane Thermal Conductivity of Black Phosphorus,” Advanced Materials, vol. 29, pp. 1603756, 2017. Publisher's Version
2016
X. Chen, Bansal, D., Sullivan, S., Abernathy, D. L., Aczel, A. A., Zhou, J., Delaire, O., and Shi, L., “Weak coupling of pseudoacoustic phonons and magnon dynamics in the incommensurate spin-ladder compound Sr14Cu24O41,” Phys. Rev. B, vol. 94, pp. 134309, 2016. Publisher's Version
K. An, Olsson, K. S., Weathers, A., Sullivan, S., Chen, X., Li, X., Marshall, L. G., Ma, X., Klimovich, N., Zhou, J., Shi, L., and Li, X., “Magnons and Phonons Optically Driven out of Local Equilibrium in a Magnetic Insulator,” Phys. Rev. Lett., vol. 117, pp. 107202, 2016. Publisher's Version
L. Zhang, Chen, X., Tang, Y., Shi, L., Snyder, J. G., Goodenough, J. B., and Zhou, J., “Thermal stability of Mg2Si0.4Sn0.6 in inert gases and atomic-layer-deposited Al2O3 thin film as a protective coating,” J. Mater. Chem. A, vol. 4, pp. 17726-17731, 2016. Publisher's VersionAbstract
Mg2Si1-xSnx solid solutions are promising thermoelectric materials to be applied in vehicle waste-heat recovery. Their thermal stability issue, however, needs to be addressed before the materials can be applied in practical thermoelectric devices. In this work, we studied the crystal structure and chemical composition of Mg2Si1-xSnx in inert gas atmosphere up to 823 K. We found that the sample was oxidized even in high-purity inert gases. Although no obvious structural change has been found in the slightly oxidized sample, carrier concentration decreased significantly since oxidation creates Mg vacancies in the lattice. We demonstrated that an atomic-layer deposited Al2O3 coating can effectively protect Mg2Si1-xSnx from oxidation in inert gases and even in air. In addition, this Al2O3 thin film also provides in situ protection to the Sb-doped Mg2Si1-xSnx samples during the laser-flash measurement and therefore eliminates the measurement error that occurs in uncoated samples as a result of sample oxidation and graphite exfoliation issues.
M. Kayyalha, Maassen, J., Lundstrom, M., Shi, L., and Chen, Y. P., “Gate-tunable and thickness-dependent electronic and thermoelectric transport in few-layer MoS2,” Journal of Applied Physics, vol. 120, pp. 134305, 2016. Publisher's Version
G. Coloyan, Cultrara, N. D., Katre, A., Carrete, J., Heine, M., Ou, E., Kim, J., Jiang, S., Lindsay, L., Mingo, N., Broido, D., Heremans, J. P., Goldberger, J., and Shi, L., “Basal-plane thermal conductivity of nanocrystalline and amorphized thin germanane,” Applied Physics Letters, vol. 109, pp. 131907, 2016. Publisher's Version
M. T. Pettes, Kim, J., Wu, W., Bustillo, K. C., and Shi, L., “Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates,” APL Mater., vol. 4, pp. 104810, 2016. Publisher's Version
M. M. Sadeghi, Park, S., Huang, Y., Akinwande, D., Yao, Z., Murthy, J., and Shi, L., “Quantitative scanning thermal microscopy of graphene devices on flexible polyimide substrates,” Journal of Applied Physics, vol. 119, pp. 235101, 2016. Publisher's Version
J. Kim, Evans, D. A., Sellan, D. P., Williams, O. M., Ou, E., Cowley, A. H., and Shi, L., “Thermal and thermoelectric transport measurements of an individual boron arsenide microstructure,” Applied Physics Letters, vol. 108, pp. 201905, 2016. Publisher's Version
L. Zhang, Xiao, P., Shi, L., Henkelman, G., Goodenough, J. B., and Zhou, J., “Localized Mg-vacancy states in the thermoelectric material Mg2−δSi0.4Sn0.6,” Journal of Applied Physics, vol. 119, pp. 085104, 2016. Publisher's Version
L. A. Jauregui, Pettes, M. T., Rokhinson, L. P., Shi, L., and Chen, Y. P., “Magnetic field-induced helical mode and topological transitions in a topological insulator nanoribbon,” Nature Nanotechnology, vol. 11, pp. 345–351, 2016. Publisher's VersionAbstract
The spin-helical Dirac fermion topological surface states in a topological insulator nanowire or nanoribbon promise novel topological devices and exotic physics such as Majorana fermions. Here, we report local and non-local transport measurements in Bi2Te3 topological insulator nanoribbons that exhibit quasi-ballistic transport over ∼2 μm. The conductance versus axial magnetic flux Φ exhibits Aharonov–Bohm oscillations with maxima occurring alternately at half-integer or integer flux quanta (Φ0 = h/e, where h is Planck's constant and e is the electron charge) depending periodically on the gate-tuned Fermi wavevector (kF) with period 2π/C (where C is the nanoribbon circumference). The conductance versus gate voltage also exhibits kF-periodic oscillations, anti-correlated between Φ = 0 and Φ0/2. These oscillations enable us to probe the Bi2Te3 band structure, and are consistent with the circumferentially quantized topological surface states forming a series of one-dimensional subbands, which undergo periodic magnetic field-induced topological transitions with the disappearance/appearance of the gapless Dirac point with a one-dimensional spin helical mode.
2015
M. T. Pettes, Sadeghi, M. M., Ji, H., Jo, I., Wu, W., Ruoff, R. S., and Shi, L., “Scattering of phonons by high-concentration isotopic impurities in ultrathin graphite,” Phys. Rev. B, vol. 91, pp. 035429, 2015. Publisher's Version

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