160 citations · 726 across the 16 of their papers we have counts for
13 papers · 1 filter
Ultrafast measurements of mode-specific deformation potentials of BiTe and BiSe
Yijing Huang, José D. Querales-Flores, Samuel W. Teitelbaum +24
Quantifying electron-phonon interactions for the surface states of topological materials can provide key insights into surface-state transport, topological superconductivity, and p…
Influence of local symmetry on lattice dynamics coupled to topological surface states
Jonathan A. Sobota, Samuel W. Teitelbaum, Yijing Huang +18
We investigate coupled electron-lattice dynamics in the topological insulator Bi2Te3 with time-resolved photoemission and time-resolved x-ray diffraction. It is well established th…
Charge-carrier behavior in Ba-, Sr- and Yb-filled CoSb: NMR and transport studies
Yefan Tian, Ali A. Sirusi, Sedat Ballikaya +3
We report Co NMR and transport measurements on -type filled skutterudites BaYbCoSb and CoSb (= Ba, Sr), promising thermoelectric m…
Measurements of Nonequilibrium Interatomic Forces in Photoexcited Bismuth
Samuel W. Teitelbaum, Thomas C. Henighan, Hanzhe Liu +11
We determine experimentally the excited-state interatomic forces in photoexcited bismuth. The forces are obtained by a constrained least-squares fit of the excited-state dispersion…
Direct Measurement of Anharmonic Decay Channels of a Coherent Phonon
Samuel W. Teitelbaum, Tom Henighan, Yijing Huang +12
We observe anharmonic decay of the photoexcited coherent A1g phonon in bismuth to points in the Brillouin zone where conservation of momentum and energy are satisfied for three-pho…
Unconventional Large Linear Magnetoresistance in CuTe
Ali A. Sirusi, Alexander Page, Lucia Steinke +3
We report a large linear magnetoresistance in CuTe, reaching = 250\% at 2 K in a 9 T field. This is observed for samples with in the range 0.13 to 0.22, and t…
Surface vibrational modes of the topological insulator BiSe observed by Raman spectroscopy
H. -H. Kung, M. Salehi, I. Boulares +10
We present polarization resolved Raman scattering study of surface vibration modes in the topological insulator BiSe single crystal and thick films. Besides the four Raman…
Understanding the role and interplay of heavy hole and light hole valence bands in the thermoelectric properties of PbSe
Thomas C. Chasapis, Yeseul Lee, Euripides Hatzikraniotis +4
The thermoelectric properties of PbSe have significantly improved in recent years reaching figures of merit ZT 1.6. The transport properties of the hole doped high temperature ther…
Direct measurement of time-dependent density-density correlations in a solid through the acoustic analog of the dynamical Casimir effect
M. Trigo, M. Fuchs, J. Chen +20
The macroscopic characteristics of a solid, such as its thermal, optical or transport properties are determined by the available microscopic states above its lowest energy level. T…
Free-carrier relaxation and lattice heating in photoexcited bismuth thin films
Y. M. Sheu, Y. J. Chien, C. Uher +2
We report ultrafast surface pump and interface probe experiments on photoexcited carrier transport across single crystal bismuth films on sapphire. The film thickness is sufficient…
High temperature charge and thermal transport properties of the n-type thermoelectric material PbSe
John Androulakis, Duck-Young Chung, Xianli Su +6
We present a detailed study of the charge transport, optical reflectivity, and thermal transport properties of n-type PbSe crystals. A strong scattering, mobility-limiting mechanis…
Thermoelectric enhancement in PbTe with K, Na co-doping from tuning the interaction of the light and heavy hole valence bands
John Androulakis, Iliya Todorov, Duck-Young Chung +4
The effect of K and K-Na substitution for Pb atoms in the rock salt lattice of PbTe was investigated to test a hypothesis for development of resonant states in the valence band tha…
Low temperature ferromagnetic properties of the diluted magnetic semiconductor Sb2-xCrxTe3
J. S. Dyck, C. Drasar, P. Lostak +1
We report on magnetic and electrical transport properties of Sb2-xCrxTe3 single crystals with 0 <= x <= 0.095 over temperatures from 2 K to 300 K. A ferromagnetic state develops in…