Preliminary studies of the Raman spectra of Ag2 Te and Ag 5 Te3

T. I. Milenov; T. Tenev; I. Miloushev; G. V. Avdeev; Chih-Wei Luo; Wu-Ching Chou

doi:10.1007/s11082-013-9810-1

Preliminary studies of the Raman spectra of Ag₂ Te and Ag ₅ Te₃

T. I. Milenov^*, T. Tenev, I. Miloushev, G. V. Avdeev, Chih-Wei Luo, Wu-Ching Chou

^*Corresponding author for this work

Department of Electrophysics

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

The theoretical calculations indicated that the monoclinic low-temperature phase of silver telluride (β -Ag₂ Te) is a new binary topological insulator with highly anisotropic single Dirac cone surface. We obtained β -Ag₂ Te crystal ingots containing few grains by the Bridgman method. We also deposited thin films of tellurium, Ag₅ Te₃ and (Te+Ag₅ Te₃) by thermal evaporation method. The Raman spectra of β -Ag₂ Te, tellurium and Ag ₅ Te₃ were measured at three excitation wave lengths: 633, 515 and 488 nm. The Raman active modes of β -Ag₂ Te, tellurium and Ag₅ Te₃ are situated at frequencies below 300 cm _-1 while vibrations of other phases appear at higher frequencies.

Original language	English
Pages (from-to)	573-580
Number of pages	8
Journal	Optical and Quantum Electronics
Volume	46
Issue number	4
DOIs	https://doi.org/10.1007/s11082-013-9810-1
State	Published - Apr 2014

Keywords

Raman spectroscopy
Semiconductors
Single crystals
Thin films
BILBAO CRYSTALLOGRAPHIC SERVER
LATTICE-DYNAMICS

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title = "Preliminary studies of the Raman spectra of Ag2 Te and Ag 5 Te3",

abstract = "The theoretical calculations indicated that the monoclinic low-temperature phase of silver telluride (β -Ag2 Te) is a new binary topological insulator with highly anisotropic single Dirac cone surface. We obtained β -Ag2 Te crystal ingots containing few grains by the Bridgman method. We also deposited thin films of tellurium, Ag5 Te3 and (Te+Ag5 Te3) by thermal evaporation method. The Raman spectra of β -Ag2 Te, tellurium and Ag 5 Te3 were measured at three excitation wave lengths: 633, 515 and 488 nm. The Raman active modes of β -Ag2 Te, tellurium and Ag5 Te3 are situated at frequencies below 300 cm -1 while vibrations of other phases appear at higher frequencies.",

keywords = "Raman spectroscopy, Semiconductors, Single crystals, Thin films, BILBAO CRYSTALLOGRAPHIC SERVER, LATTICE-DYNAMICS",

author = "Milenov, {T. I.} and T. Tenev and I. Miloushev and Avdeev, {G. V.} and Chih-Wei Luo and Wu-Ching Chou",

year = "2014",

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doi = "10.1007/s11082-013-9810-1",

language = "English",

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T1 - Preliminary studies of the Raman spectra of Ag2 Te and Ag 5 Te3

AU - Milenov, T. I.

AU - Tenev, T.

AU - Miloushev, I.

AU - Avdeev, G. V.

AU - Luo, Chih-Wei

AU - Chou, Wu-Ching

PY - 2014/4

Y1 - 2014/4

N2 - The theoretical calculations indicated that the monoclinic low-temperature phase of silver telluride (β -Ag2 Te) is a new binary topological insulator with highly anisotropic single Dirac cone surface. We obtained β -Ag2 Te crystal ingots containing few grains by the Bridgman method. We also deposited thin films of tellurium, Ag5 Te3 and (Te+Ag5 Te3) by thermal evaporation method. The Raman spectra of β -Ag2 Te, tellurium and Ag 5 Te3 were measured at three excitation wave lengths: 633, 515 and 488 nm. The Raman active modes of β -Ag2 Te, tellurium and Ag5 Te3 are situated at frequencies below 300 cm -1 while vibrations of other phases appear at higher frequencies.

AB - The theoretical calculations indicated that the monoclinic low-temperature phase of silver telluride (β -Ag2 Te) is a new binary topological insulator with highly anisotropic single Dirac cone surface. We obtained β -Ag2 Te crystal ingots containing few grains by the Bridgman method. We also deposited thin films of tellurium, Ag5 Te3 and (Te+Ag5 Te3) by thermal evaporation method. The Raman spectra of β -Ag2 Te, tellurium and Ag 5 Te3 were measured at three excitation wave lengths: 633, 515 and 488 nm. The Raman active modes of β -Ag2 Te, tellurium and Ag5 Te3 are situated at frequencies below 300 cm -1 while vibrations of other phases appear at higher frequencies.

KW - Raman spectroscopy

KW - Semiconductors

KW - Single crystals

KW - Thin films

KW - BILBAO CRYSTALLOGRAPHIC SERVER

KW - LATTICE-DYNAMICS

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DO - 10.1007/s11082-013-9810-1

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VL - 46

SP - 573

EP - 580

JO - Optical and Quantum Electronics

JF - Optical and Quantum Electronics

SN - 0306-8919

IS - 4

ER -

Preliminary studies of the Raman spectra of Ag₂ Te and Ag ₅ Te₃

Abstract

Keywords

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