Electronic properties of GeTe and Ag- or Sb-substituted GeTe studied by low-temperature NMR
Abstract
We have carried out 125Te nuclear magnetic resonance (NMR) in a wide temperature range of 1.5–300 K to investigate the electronic properties of Ge50 Te50, Ag2 Ge48Te50 , and Sb2 Ge48 Te50 from a microscopic point of view. From the temperature dependence of the NMR shift (K) and nuclear spin lattice relaxation rate (1/T1), we found that two bands contribute to the physical properties of the materials. One band overlaps the Fermi level providing the metallic state where no strong electron correlations are revealed by Korringa analysis. The other band is separated from the Fermi level by an energy gap of Eg/kB ~67 K, which gives rise to semiconductorlike properties. First-principles calculation reveals that the metallic band originates from the Ge vacancy while the semiconductorlike band is related to the fine structure of the density of states near the Fermi level. We find low-temperature Te125 NMR data for the materials studied here clearly show that Ag substitution increases hole concentration while Sb substitution decreases it.
- Authors:
-
- Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Chemistry
- Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1326845
- Alternate Identifier(s):
- OSTI ID: 1298343
- Report Number(s):
- IS-J-9078
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1700098
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 8; 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
Citation Formats
Cui, J., Levin, E. M., Lee, Y., and Furukawa, Y. Electronic properties of GeTe and Ag- or Sb-substituted GeTe studied by low-temperature Te125 NMR. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.085203.
Cui, J., Levin, E. M., Lee, Y., & Furukawa, Y. Electronic properties of GeTe and Ag- or Sb-substituted GeTe studied by low-temperature Te125 NMR. United States. https://doi.org/10.1103/PhysRevB.94.085203
Cui, J., Levin, E. M., Lee, Y., and Furukawa, Y. 2016.
"Electronic properties of GeTe and Ag- or Sb-substituted GeTe studied by low-temperature Te125 NMR". United States. https://doi.org/10.1103/PhysRevB.94.085203. https://www.osti.gov/servlets/purl/1326845.
@article{osti_1326845,
title = {Electronic properties of GeTe and Ag- or Sb-substituted GeTe studied by low-temperature Te125 NMR},
author = {Cui, J. and Levin, E. M. and Lee, Y. and Furukawa, Y.},
abstractNote = {We have carried out 125Te nuclear magnetic resonance (NMR) in a wide temperature range of 1.5–300 K to investigate the electronic properties of Ge50 Te50, Ag2 Ge48Te50 , and Sb2 Ge48 Te50 from a microscopic point of view. From the temperature dependence of the NMR shift (K) and nuclear spin lattice relaxation rate (1/T1), we found that two bands contribute to the physical properties of the materials. One band overlaps the Fermi level providing the metallic state where no strong electron correlations are revealed by Korringa analysis. The other band is separated from the Fermi level by an energy gap of Eg/kB ~67 K, which gives rise to semiconductorlike properties. First-principles calculation reveals that the metallic band originates from the Ge vacancy while the semiconductorlike band is related to the fine structure of the density of states near the Fermi level. We find low-temperature Te125 NMR data for the materials studied here clearly show that Ag substitution increases hole concentration while Sb substitution decreases it.},
doi = {10.1103/PhysRevB.94.085203},
url = {https://www.osti.gov/biblio/1326845},
journal = {Physical Review B},
issn = {2469-9950},
number = 8,
volume = 94,
place = {United States},
year = {Thu Aug 18 00:00:00 EDT 2016},
month = {Thu Aug 18 00:00:00 EDT 2016}
}
Web of Science
Works referenced in this record:
Enhancement of Thermopower of TAGS-85 High-Performance Thermoelectric Material by Doping with the Rare Earth Dy
journal, April 2012
- Levin, E. M.; Bud'ko, S. L.; Schmidt-Rohr, K.
- Advanced Functional Materials, Vol. 22, Issue 13
Generalized Gradient Approximation Made Simple
journal, October 1996
- Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
- Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
NMR probe of pseudogap characteristics in
journal, April 2000
- Lue, C. S.; Ross, Joseph H.
- Physical Review B, Vol. 61, Issue 15
NMR probe of pseudogap characteristics in
journal, June 2007
- Lue, C. S.; Wang, S. Y.; Fang, C. P.
- Physical Review B, Vol. 75, Issue 23
RELATIVISTIC BAND STRUCTURE OF GeTe, SnTe, PbTe, PbSe, AND PbS
journal, November 1968
- Herman, Frank; Kortum, Richard L.; Ortenburger, Irene B.
- Le Journal de Physique Colloques, Vol. 29, Issue C4
Soft phonon mode and ferroelectricity in GeTe
journal, August 1970
- Steigmeier, E. F.; Harbeke, G.
- Solid State Communications, Vol. 8, Issue 16
Origin of the High Performance in GeTe-Based Thermoelectric Materials upon Bi 2 Te 3 Doping
journal, August 2014
- Wu, Di; Zhao, Li-Dong; Hao, Shiqiang
- Journal of the American Chemical Society, Vol. 136, Issue 32
Binary Alloys of Ge and Te: Order, Voids, and the Eutectic Composition
journal, May 2008
- Akola, J.; Jones, R. O.
- Physical Review Letters, Vol. 100, Issue 20
Thermoelectric figure of merit of the system (GeTe)1−x(AgSbTe2)x
journal, May 1984
- Placheova, S. K.
- Physica Status Solidi (a), Vol. 83, Issue 1
The Effect of Electron-Electron Interaction on the Nuclear Spin Relaxation in Metals
journal, April 1963
- Moriya, Tôru
- Journal of the Physical Society of Japan, Vol. 18, Issue 4
Complex thermoelectric materials
journal, February 2008
- Snyder, G. Jeffrey; Toberer, Eric S.
- Nature Materials, Vol. 7, Issue 2, p. 105-114
Nature of the cubic to rhombohedral structural transformation in (AgSbTe2)15(GeTe)85 thermoelectric material
journal, March 2007
- Cook, B. A.; Kramer, M. J.; Wei, X.
- Journal of Applied Physics, Vol. 101, Issue 5
Enhanced thermoelectric performance of GeTe-rich germanium antimony tellurides through the control of composition and structure
journal, January 2015
- Sankar, Raman; Wong, Deniz P.; Chi, Chiao-Song
- CrystEngComm, Vol. 17, Issue 18
Optical properties of cubic and rhombohedral GeTe
journal, May 2013
- Singh, David J.
- Journal of Applied Physics, Vol. 113, Issue 20
Superconductivity in Germanium Telluride
journal, March 1964
- Hein, R. A.; Gibson, J. W.; Mazelsky, R.
- Physical Review Letters, Vol. 12, Issue 12
Experimental study of the thermoelectric power factor enhancement in composites
journal, September 2008
- Heremans, J. P.; Jaworski, C. M.
- Applied Physics Letters, Vol. 93, Issue 12
Nature of the defects in germanium telluride
journal, March 1967
- Damon, D. H.; Lubell, M. S.; Mazelsky, R.
- Journal of Physics and Chemistry of Solids, Vol. 28, Issue 3
Solid solution of lead-germanium chalcogenide alloys and some of their optical properties
journal, March 1969
- Nikolic, P. M.
- Journal of Physics D: Applied Physics, Vol. 2, Issue 3
Effects of Ge substitution in GeTe by Ag or Sb on the Seebeck coefficient and carrier concentration derived from NMR
journal, January 2016
- Levin, E. M.
- Physical Review B, Vol. 93, Issue 4
Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States
journal, July 2008
- Heremans, J. P.; Jovovic, V.; Toberer, E. S.
- Science, Vol. 321, Issue 5888, p. 554-557
Electronic structure of intrinsic defects in crystalline germanium telluride
journal, January 2006
- Edwards, Arthur; Pineda, Andrew; Schultz, Peter
- Physical Review B, Vol. 73, Issue 4
Effects of Electron-Electron Interactions on Nuclear Spin-Lattice Relaxation Rates and Knight Shifts in Alkali and Noble Metals
journal, November 1968
- Narath, Albert; Weaver, H. T.
- Physical Review, Vol. 175, Issue 2
Thermoelectric Performance and High-Temperature Creep Behavior of GeTe-Based Thermoelectric Materials
journal, February 2011
- Zhang, Lili; Wang, Wei; Ren, Baoguo
- Journal of Electronic Materials, Vol. 40, Issue 5
Electronic inhomogeneity in - and -type PbTe detected by Te NMR
journal, September 2013
- Levin, E. M.; Heremans, J. P.; Kanatzidis, M. G.
- Physical Review B, Vol. 88, Issue 11
Anomalous Hall Effect in AgSbTe2
journal, November 1960
- Wolfe, R.; Wernick, J. H.; Haszko, S. E.
- Journal of Applied Physics, Vol. 31, Issue 11, p. 1959-1964
Nuclear magnetic relaxation in semiconductors
journal, January 1954
- Bloembergen, N.
- Physica, Vol. 20, Issue 7-12
Highly Efficient Ge-Rich Ge x Pb1−x Te Thermoelectric Alloys
journal, December 2009
- Gelbstein, Yaniv; Dado, Boaz; Ben-Yehuda, Ohad
- Journal of Electronic Materials, Vol. 39, Issue 9
Electronic and thermal transport in GeTe: A versatile base for thermoelectric materials
journal, August 2013
- Levin, E. M.; Besser, M. F.; Hanus, R.
- Journal of Applied Physics, Vol. 114, Issue 8
Thermoelectric Properties of (Pb,Sn,Ge)Te-Based Alloys
journal, January 2009
- Gelbstein, Y.; Ben-Yehuda, O.; Pinhas, E.
- Journal of Electronic Materials, Vol. 38, Issue 7
Carrier Compensation in Germanium Telluride
journal, January 1963
- Lubell, M. S.; Mazelsky, R.
- Journal of The Electrochemical Society, Vol. 110, Issue 6
OPTICAL PROPERTIES, BAND STRUCTURE, AND SUPERCONDUCTING PROPERTIES OF SnTe AND GeTe
journal, November 1968
- Cohen, Marvin L.; Tung, Yvonne; Allen, Philip B.
- Le Journal de Physique Colloques, Vol. 29, Issue C4
Thermal transport in the Falicov-Kimball model on a Bethe lattice
journal, April 2004
- Joura, A. V.; Demchenko, D. O.; Freericks, J. K.
- Physical Review B, Vol. 69, Issue 16