Understanding the evolution of anomalous anharmonicity in Bi2Te3-xSex

Tian, Yao; Jia, Shuang; Cava, R. J.; Zhong, Ruidan; Schneeloch, John; Gu, Genda; Burch, Kenneth S.

doi:10.1103/PhysRevB.95.094104

Title: Understanding the evolution of anomalous anharmonicity in ${Bi}_{2} {Te}_{3 - x} {Se}_{x}$

Abstract

The anharmonic effect in thermoelectrics has been a central topic for decades in both condensed matter physics and material science. However, despite the long-believed strong and complex anharmonicity in the Bi₂Te_3-xSe_x series, experimental verification of anharmonicity and its evolution with doping remains elusive. We fill this important gap with high-resolution, temperature-dependent Raman spectroscopy in high-quality single crystals of Bi₂Te, Bi₂Te₂Se , and Bi₂Se₃ over the temperature range from 4 to 293 K. Klemens's model was employed to explain the renormalization of their phonon linewidths. The phonon energies of Bi₂Se₃ and Bi₂Te₃ are analyzed in detail from three aspects: lattice expansion, cubic anharmonicity, and quartic anharmonicity. For the first time, we explain the evolution of anharmonicity in various phonon modes and across the series. Lastly, in particular, we find that the interplay between cubic and quartic anharmonicity is governed by their distinct dependence on the phonon density of states, providing insights into anomalous anharmonicity designing of new thermoelectrics.

Authors:

Tian, Yao ^[1]; Jia, Shuang ^[2]; Cava, R. J. ^[2]; Zhong, Ruidan ^[3]; Schneeloch, John ^[3]; Gu, Genda ^[3]; Burch, Kenneth S. ^[4]

Univ. of Toronto, ON (Canada). Dept. of Physics & Inst. of Optical Sciences
Princeton Univ., NJ (United States). Dept. of Chemistry
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Boston College, Chestnut Hill, MA (United States). Dept. of Physics

Publication Date:: 2017-03-08

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:: 1372431

Report Number(s):: BNL-113904-2017-JA
Journal ID: ISSN 2469-9950; PRBMDO; R&D Project: PO010; KC0201060; TRN: US1702667

Grant/Contract Number:: SC0012704; DMR-1420541; DMR-1410846

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 95; Journal Issue: 9; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; Lattice dynamics; Phonons; Optical phonons

Citation Formats


                    Tian, Yao, Jia, Shuang, Cava, R. J., Zhong, Ruidan, Schneeloch, John, Gu, Genda, and Burch, Kenneth S. Understanding the evolution of anomalous anharmonicity in Bi2Te3-xSex.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevB.95.094104.

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                    Tian, Yao, Jia, Shuang, Cava, R. J., Zhong, Ruidan, Schneeloch, John, Gu, Genda, & Burch, Kenneth S. Understanding the evolution of anomalous anharmonicity in Bi2Te3-xSex.  United States.  https://doi.org/10.1103/PhysRevB.95.094104

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                    Tian, Yao, Jia, Shuang, Cava, R. J., Zhong, Ruidan, Schneeloch, John, Gu, Genda, and Burch, Kenneth S. Wed .  
"Understanding the evolution of anomalous anharmonicity in Bi2Te3-xSex".  United States.  https://doi.org/10.1103/PhysRevB.95.094104.  https://www.osti.gov/servlets/purl/1372431.

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@article{osti_1372431,

  title        = {Understanding the evolution of anomalous anharmonicity in Bi2Te3-xSex},

  author       = {Tian, Yao and Jia, Shuang and Cava, R. J. and Zhong, Ruidan and Schneeloch, John and Gu, Genda and Burch, Kenneth S.},

  abstractNote = {The anharmonic effect in thermoelectrics has been a central topic for decades in both condensed matter physics and material science. However, despite the long-believed strong and complex anharmonicity in the Bi2Te3-xSex series, experimental verification of anharmonicity and its evolution with doping remains elusive. We fill this important gap with high-resolution, temperature-dependent Raman spectroscopy in high-quality single crystals of Bi2Te, Bi2Te2Se , and Bi2Se3 over the temperature range from 4 to 293 K. Klemens's model was employed to explain the renormalization of their phonon linewidths. The phonon energies of Bi2Se3 and Bi2Te3 are analyzed in detail from three aspects: lattice expansion, cubic anharmonicity, and quartic anharmonicity. For the first time, we explain the evolution of anharmonicity in various phonon modes and across the series. Lastly, in particular, we find that the interplay between cubic and quartic anharmonicity is governed by their distinct dependence on the phonon density of states, providing insights into anomalous anharmonicity designing of new thermoelectrics.},

  doi          = {10.1103/PhysRevB.95.094104},

  journal      = {Physical Review B},

  number       = 9,

  volume       = 95,

  place        = {United States},

  year         = {2017},

  month        = {3}

}

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Works referenced in this record:

Raman study of the phonon symmetries in BiFeO $_{3}$ single crystals
journal, July 2012

Beekman, C.; Reijnders, A. A.; Oh, Y. S.
Physical Review B, Vol. 86, Issue 2
DOI: 10.1103/PhysRevB.86.020403

Giant anharmonic phonon scattering in PbTe
journal, June 2011

Delaire, O.; Ma, J.; Marty, K.
Nature Materials, Vol. 10, Issue 8, p. 614-619
DOI: 10.1038/nmat3035

Thermal expansion coefficients of Bi ₂ Se ₃ and Sb ₂ Te ₃ crystals from 10 K to 270 K
journal, December 2011

Chen, X.; Zhou, H. D.; Kiswandhi, A.
Applied Physics Letters, Vol. 99, Issue 26
DOI: 10.1063/1.3672198

Thermal expansion of bismuth telluride
journal, June 2011

Pavlova, L. M.; Shtern, Yu. I.; Mironov, R. E.
High Temperature, Vol. 49, Issue 3
DOI: 10.1134/S0018151X1103014X

Raman studies of GaN/sapphire thin film heterostructures
journal, September 2009

Hushur, Anwar; Manghnani, Murli H.; Narayan, Jagdish
Journal of Applied Physics, Vol. 106, Issue 5
DOI: 10.1063/1.3213370

Resonant bonding leads to low lattice thermal conductivity
journal, April 2014

Lee, Sangyeop; Esfarjani, Keivan; Luo, Tengfei
Nature Communications, Vol. 5, Issue 1
DOI: 10.1038/ncomms4525

Phase-Change Materials: Vibrational Softening upon Crystallization and Its Impact on Thermal Properties
journal, April 2011

Matsunaga, Toshiyuki; Yamada, Noboru; Kojima, Rie
Advanced Functional Materials, Vol. 21, Issue 12
DOI: 10.1002/adfm.201002274

Temperature dependence of Raman-active optical phonons in Bi ₂ Se ₃ and Sb ₂ Te ₃
journal, February 2012

Kim, Y.; Chen, X.; Wang, Z.
Applied Physics Letters, Vol. 100, Issue 7
DOI: 10.1063/1.3685465

Stability of exfoliated ${Bi}_{2} {Sr}_{2} {Dy}_{x} {Ca}_{1 - x} {Cu}_{2} O_{8 + δ}$ studied by Raman microscopy
journal, August 2010

Sandilands, L. J.; Shen, J. X.; Chugunov, G. M.
Physical Review B, Vol. 82, Issue 6
DOI: 10.1103/PhysRevB.82.064503

Synthesis of graphene on gold
journal, May 2011

Oznuluer, Tuba; Pince, Ercag; Polat, Emre O.
Applied Physics Letters, Vol. 98, Issue 18
DOI: 10.1063/1.3584006

Helical fluctuations in the Raman response of the topological insulator Bi $_{2}$ Se $_{3}$
journal, November 2011

Gnezdilov, V.; Pashkevich, Yu. G.; Berger, H.
Physical Review B, Vol. 84, Issue 19
DOI: 10.1103/PhysRevB.84.195118

Connecting Thermoelectric Performance and Topological-Insulator Behavior: ${Bi}_{2} {Te}_{3}$ and ${Bi}_{2} {Te}_{2} Se$ from First Principles
journal, January 2015

Shi, Hongliang; Parker, David; Du, Mao-Hua
Physical Review Applied, Vol. 3, Issue 1
DOI: 10.1103/PhysRevApplied.3.014004

Orbitally driven giant phonon anharmonicity in SnSe
journal, October 2015

Li, C. W.; Hong, J.; May, A. F.
Nature Physics, Vol. 11, Issue 12
DOI: 10.1038/nphys3492

Anharmonicity in the Silver and Thallium Halides: Far-Infrared Dielectric Response
journal, August 1972

Lowndes, R. P.
Physical Review B, Vol. 6, Issue 4
DOI: 10.1103/PhysRevB.6.1490

Design Rules for Phase-Change Materials in Data Storage Applications
journal, April 2011

Lencer, Dominic; Salinga, Martin; Wuttig, Matthias
Advanced Materials, Vol. 23, Issue 18
DOI: 10.1002/adma.201004255

Anharmonic phonon effects in Raman spectra of unsupported vertical graphene sheets
journal, March 2011

Lin, Jingjing; Guo, Liwei; Huang, Qingsong
Physical Review B, Vol. 83, Issue 12
DOI: 10.1103/PhysRevB.83.125430

Scattering Continuum and Possible Fractionalized Excitations in $α − {RuCl}_{3}$
journal, April 2015

Sandilands, Luke J.; Tian, Yao; Plumb, Kemp W.
Physical Review Letters, Vol. 114, Issue 14
DOI: 10.1103/PhysRevLett.114.147201

Phonon thermal transport in ${Bi}_{2} {Te}_{3}$ from first principles
journal, October 2014

Hellman, Olle; Broido, David A.
Physical Review B, Vol. 90, Issue 13
DOI: 10.1103/PhysRevB.90.134309

Theoretical study of the anharmonic decay of nonequilibrium LO phonons in semiconductor structures
journal, November 1994

Usher, Sarah; Srivastava, G. P.
Physical Review B, Vol. 50, Issue 19
DOI: 10.1103/PhysRevB.50.14179

Thermal conductivity of perovskite ferroelectrics
journal, September 2008

Tachibana, Makoto; Kolodiazhnyi, Taras; Takayama-Muromachi, Eiji
Applied Physics Letters, Vol. 93, Issue 9
DOI: 10.1063/1.2978072

Silent soft mode in hexagonal barium titanate observed by hyper-Raman scattering
journal, September 1988

Inoue, Kuon; Hasegawa, Atsushi; Watanabe, Kenji
Physical Review B, Vol. 38, Issue 9
DOI: 10.1103/PhysRevB.38.6352

A Raman and far-infrared investigation of phonons in the rhombohedral V2–VI3 compounds Bi2Te3, Bi2Se3, Sb2Te3 and Bi2(Te1−xSex)3 (0 <x < 1), (Bi1−ySby)2Te3 (0 <y < 1)
journal, December 1977

Richter, W.; Becker, C. R.
Physica Status Solidi (b), Vol. 84, Issue 2
DOI: 10.1002/pssb.2220840226

Thermal Conductivity in Perovskites
journal, October 1970

Barrett, H. H.; Holland, M. G.
Physical Review B, Vol. 2, Issue 8
DOI: 10.1103/PhysRevB.2.3441

Probing Strain-Induced Electronic Structure Change in Graphene by Raman Spectroscopy
journal, October 2010

Huang, Mingyuan; Yan, Hugen; Heinz, Tony F.
Nano Letters, Vol. 10, Issue 10
DOI: 10.1021/nl102123c

Low-carrier-concentration crystals of the topological insulator Bi $_{2}$ Te $_{2}$ Se
journal, December 2011

Jia, Shuang; Ji, Huiwen; Climent-Pascual, E.
Physical Review B, Vol. 84, Issue 23
DOI: 10.1103/PhysRevB.84.235206

Anharmonic Decay of Optical Phonons
journal, August 1966

Klemens, P. G.
Physical Review, Vol. 148, Issue 2
DOI: 10.1103/PhysRev.148.845

Ferroelectric Soft Mode in a ${SrTiO}_{3}$ Thin Film Impulsively Driven to the Anharmonic Regime Using Intense Picosecond Terahertz Pulses
journal, February 2012

Katayama, I.; Aoki, H.; Takeda, J.
Physical Review Letters, Vol. 108, Issue 9
DOI: 10.1103/PhysRevLett.108.097401

Hyper-Raman spectra and frequency dependence of soft mode damping in SrTiO3
journal, August 1983

Denisov, V. N.; Mavrin, B. N.; Podobedov, V. B.
Journal of Raman Spectroscopy, Vol. 14, Issue 4
DOI: 10.1002/jrs.1250140413

Magneto-elastic coupling in a potential ferromagnetic 2D atomic crystal
journal, June 2016

Tian, Yao; Gray, Mason J.; Ji, Huiwen
2D Materials, Vol. 3, Issue 2
DOI: 10.1088/2053-1583/3/2/025035

Structural phase transition and anharmonic effects in crystals
journal, February 2001

Fujii, Katsuhiko; Aikawa, Yutaka; Ohoka, Kazuya
Physical Review B, Vol. 63, Issue 10
DOI: 10.1103/PhysRevB.63.104107

Low vibration high numerical aperture automated variable temperature Raman microscope
journal, April 2016

Tian, Yao; Reijnders, Anjan A.; Osterhoudt, Gavin B.
Review of Scientific Instruments, Vol. 87, Issue 4
DOI: 10.1063/1.4944559

Local phonon mode in thermoelectric Bi ₂ Te ₂ Se from charge neutral antisites
journal, January 2016

Tian, Yao; Osterhoudt, Gavin B.; Jia, Shuang
Applied Physics Letters, Vol. 108, Issue 4
DOI: 10.1063/1.4941022

First-Principles Approach to Nonlinear Lattice Dynamics: Anomalous Spectra in PbTe
journal, September 2014

Chen, Yue; Ai, Xinyuan; Marianetti, C. A.
Physical Review Letters, Vol. 113, Issue 10
DOI: 10.1103/PhysRevLett.113.105501

Anharmonic crystals
journal, January 1968

Cowley, R. A.
Reports on Progress in Physics, Vol. 31, Issue 1
DOI: 10.1088/0034-4885/31/1/303

Temperature dependence of the first-order Raman scattering by phonons in Si, Ge, and $α - S n$ : Anharmonic effects
journal, February 1984

Menéndez, José; Cardona, Manuel
Physical Review B, Vol. 29, Issue 4
DOI: 10.1103/PhysRevB.29.2051

Works referencing / citing this record:

Coherent phonons in a ${Bi}_{2} {Se}_{3}$ film generated by an intense single-cycle THz pulse
journal, June 2018

Melnikov, A. A.; Boldyrev, K. N.; Selivanov, Yu. G.
Physical Review B, Vol. 97, Issue 21
DOI: 10.1103/physrevb.97.214304

Transition into a phonon glass in crystalline thermoelectric ${(S b_{1 - x} B i_{x})}_{2} T e_{3}$ films
journal, February 2020

Rieger, F.; Roddatis, V.; Kaiser, K.
Physical Review Materials, Vol. 4, Issue 2
DOI: 10.1103/physrevmaterials.4.025402

Mode Grüneisen parameters of an efficient thermoelectric half-Heusler
text, January 2018

Pang, Hong-Jie; Chen, Liu-Cheng; Cao, Zi-Yu
Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2019-00200

Mode Grüneisen parameters of an efficient thermoelectric half-Heusler
journal, November 2018

Pang, Hong-Jie; Chen, Liu-Cheng; Cao, Zi-Yu
Journal of Applied Physics, Vol. 124, Issue 19
DOI: 10.1063/1.5050697

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Title: Understanding the evolution of anomalous anharmonicity in Bi 2 Te 3 - x Se x

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