Giant enhancement of cryogenic thermopower by polar structural instability in the pressurized semimetal MoTe2
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چکیده
منابع مشابه
Critical enhancement of thermopower in a chemically tuned polar semimetal MoTe2
Ferroelectrics with spontaneous electric polarization play an essential role in today's device engineering, such as capacitors and memories. Their physical properties are further enriched by suppressing the long-range polar order, as exemplified by quantum paraelectrics with giant piezoelectric and dielectric responses at low temperatures. Likewise in metals, a polar lattice distortion has been...
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Raman signatures of inversion symmetry breaking and structural phase transition in type-II Weyl semimetal MoTe2
Transition metal dichalcogenide MoTe2 is an important candidate for realizing the newly predicted type-II Weyl fermions, for which the breaking of the inversion symmetry is a prerequisite. Here we present direct spectroscopic evidence for the inversion symmetry breaking in the low-temperature phase of MoTe2 by systematic Raman experiments and first-principles calculations. We identify five latt...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2019
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.100.195130