[en] Using first-principles electronic structure calcu-
lations, we studied the electronic and thermoelectric properties
of SrTiO3 based oxide materials and their nanostructures of
SrTiO3/KNbO3, SrTiO3/LaVO3, SrO[SrTiO3], SrO[SrTiO3]2,
and SrO[CoO2F] superlattices identifying those nanostruc-
tures which possess highly anisotropic electronic bands. We
showed recently that highly anisotropic flat-and-dispersive
bands can maximize the thermoelectric power factor, and at
the same time they can produce low dimensional electronic
transport in bulk semiconductors. Although most of the
considered nanostructures show such highly anisotropic bands,
their predicted thermoelectric performance is not improved
over that of SrTiO3. Besides highly anisotropic character, we
emphasize the importance of the large weights of electronic states participating in transport and the small effective mass of charge carriers along the transport direction. These requirements may be better achieved in binary transition metal oxides than in ABO3 perovskite oxide materials.
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège
Ohta, S.; Nomura, T.; Ohta, H.; Hirano, M.; Hosono, H.; Koumoto, K. Large thermoelectric performance of heavily Nb-doped SrTiO3 epitaxial film at high temperature Appl. Phys. Lett. 2005, 87, 092108 10.1063/1.2035889
Shang, P. P.; Zhang, B. P.; Liu, Y.; Li, J. F.; Zhu, H. M. Preparation and Thermoelectric Properties of La-Doped SrTiO3 Ceramics J. Electron. Mater. 2011, 40, 926-931 10.1007/s11664-010-1452-5
Wang, H. C.; Wang, C. L.; Su, W. B.; Liu, J.; Sun, Y.; Peng, H.; Mei, L. M. Doping Effect of La and Dy on the Thermoelectric Properties of SrTiO3 J. Am. Ceram. Soc. 2011, 94, 838-842 10.1111/j.1551-2916.2010.04185.x
Liu, J.; Wang, C. L.; Yi, L.; Su, W. B.; Zhu, Y. H.; Li, J. C.; Mei, L. M. Influence of rare earth doping on thermoelectric properties of SrTiO3 ceramics J. Appl. Phys. 2013, 114, 223714 10.1063/1.4847455
Park, K.; Son, J. S.; Woo, S., III; Shin, K.; Oh, M.-W.; Parkc, S.-D.; Hyeon, T. Colloidal synthesis and thermoelectric properties of La-doped SrTiO3 nanoparticles J. Mater. Chem. A 2014, 2, 4217-4224 10.1039/c3ta14699e
Kovalevsky, A. V.; Yaremchenko, A. A.; Populoh, S.; Thiel, P.; Fagg, D. P.; Weidenkaff, A.; Frade, J. R.; Kovalevsky, A. V.; Yaremchenko, A. A.; Populoh, S.; Thiel, P.; Fagg, D. P.; Weidenkaff, A.; Frade, J. R. Towards a high thermoelectric performance in rare-earth substituted SrTiO3: effects provided by strongly-reducing sintering conditions Phys. Chem. Chem. Phys. 2014, 16, 26946-26954 10.1039/C4CP04127E
Buscaglia, M. T.; Maglia, F.; Anselmi-Tamburini, U.; MarrÖ, D.; Pallecchi, I.; Ianculescu, A.; Canu, G.; Viviani, M.; Fabrizio, M.; Buscaglia, V. Effect of nanostructure on the thermal conductivity of La-doped SrTiO3 ceramics J. Eur. Ceram. Soc. 2014, 34, 307-316 10.1016/j.jeurceramsoc.2013.08.009
Wang, N.; Chen, H.; He, H.; Norimatsu, W.; Kusunoki, M.; Koumoto, K. Enhanced thermoelectric performance of Nb-doped SrTiO3 by nano-inclusion with low thermal conductivity Sci. Rep. 2013, 3, 3449 10.1038/srep03449
Zhang, B.; Wang, J.; Zou, T.; Zhang, S.; Yaer, X.; Ding, N.; Liu, C.; Miao, L.; Lia, Y.; Wu, Y. High thermoelectric performance of Nb-doped SrTiO3 bulk materials with different doping levels J. Mater. Chem. C 2015, 3, 11406-11411 10.1039/C5TC02016F
Dehkordi, M. A.; Bhattacharya, S.; Darroudi, T.; Zeng, X.; Alshareef, H. N.; Tritt, T. M. Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties J. Visualized Exp. 2015, 102, e52869 10.3791/52869
Lu, Z.; Zhang, H.; Lei, W.; Sinclair, D. C.; Reaney, I. M. High-Figure-of-Merit Thermoelectric La-Doped A-Site-Deficient SrTiO3 Ceramics Chem. Mater. 2016, 28, 925-935 10.1021/acs.chemmater.5b04616
Sun, J.; Singh, D. J. Thermoelectric properties of n-type SrTiO3 APL Mater. 2016, 4, 104803 10.1063/1.4952610
Li, E.; Wang, N.; He, H.; Chen, H. Improved Thermoelectric Performances of SrTiO3 Ceramic Doped with Nb by Surface Modification of Nanosized Titania Nanoscale Res. Lett. 2016, 11, 188 10.1186/s11671-016-1407-8
Wang, Y. F.; Lee, K. H.; Ohta, H.; Koumoto, K. Thermoelectric properties of electron doped SrO(SrTiO3)n (n = 1, 2) ceramics J. Appl. Phys. 2009, 105, 103701 10.1063/1.3117943
Matsubara, I.; Funahashi, R.; Takeuchi, T.; Sodeoka, S.; Shimizu, T.; Ueno, K. Fabrication of an all-oxide thermoelectric power generator Appl. Phys. Lett. 2001, 78, 3627-3629 10.1063/1.1376155
Ohtaki, M.; Tsubota, T.; Egushi, K. High-temperature thermoelectric properties of (Zn1-xAlx)O J. Appl. Phys. 1996, 79, 1816 10.1063/1.360976
Tsubota, T.; Ohtaki, M.; Eguchi, K.; Arai, H. Thermoelectric properties of Al-doped ZnO as a promising oxide material for high-temperature thermoelectric conversion J. Mater. Chem. 1997, 7, 85-90 10.1039/a602506d
Saini, S.; Mele, P.; Honda, H.; Matsumoto, K.; Miyazaki, K.; Ichinose, A. Thermoelectric Properties of Al-Doped ZnO Thin Films J. Electron. Mater. 2014, 43, 2145-2150 10.1007/s11664-014-2992-x
Wu, Z. H.; Xie, H. Q.; Zhai, Y. B. Preparation and Thermoelectric Properties of Co-Doped ZnO Synthesized by Sol-Gel J. Nanosci. Nanotechnol. 2015, 15, 3147-3150 10.1166/jnn.2015.9658
Lan, J.-L.; Liu, Y.; Lin, Y.-H.; Nan, C.-W.; Cai, Q.; Yang, X. Enhanced thermoelectric performance of In2O3-based ceramics via Nanostructuring and Point Defect Engineering Sci. Rep. 2015, 5, 7783 10.1038/srep07783
Wang, S. F.; Liu, F. Q.; Lu, Q.; Dai, S. Y.; Wang, J. L.; Yu, W.; Fu, G. S. The effect of Er3+ doping on the structure and thermoelectric properties of CdO ceramics J. Eur. Ceram. Soc. 2013, 33, 1763-1768 10.1016/j.jeurceramsoc.2013.02.025
Zhang, X. R.; Li, H. L.; Wang, J. L. Effect of sintering temperature on thermoelectric properties of CdO ceramics J. Adv. Ceram. 2015, 4, 226-231 10.1007/s40145-015-0153-1
Backhaus-Ricoult, M.; Rustad, J.; Moore, L.; Smith, C.; Brown, J. Semiconducting large bandgap oxides as potential thermoelectric materials for high-temperature power generation? Appl. Phys. A: Mater. Sci. Process. 2014, 16, 433-470 10.1007/s00339-014-8515-z
Masset, A. C.; Michel, C.; Maignan, A.; Hervieu, M.; Toulemonde, O.; Studer, F.; Raveau, B.; Hejtmanek, J. Misfit-layered cobaltite with an anisotropic giant magnetoresistance: Ca3Co4O9 Phys. Rev. B: Condens. Matter Mater. Phys. 2000, 62, 166-175 10.1103/PhysRevB.62.166
Ohta, H. et al. Giant thermoelectric Seebeck coefficient of a two-dimensional electron gas in SrTiO3 Nat. Mater. 2007, 6, 129-134 10.1038/nmat1821
Ohta, H.; Sugiura, K.; Koumoto, K. Recent Progress in Oxide Thermoelectric Materials: p-Type Ca3Co4O9 and n-Type SrTiO3 Inorg. Chem. 2008, 47, 8429-8436 10.1021/ic800644x
Koumoto, K.; Terasaki, I.; Funahashi, R. Complex Oxide Materials for Potential Thermoelectric Applications MRS Bull. 2006, 31, 206-210 10.1557/mrs2006.46
Mune, Y.; Ohta, H.; Koumoto, K.; Mizoguchi, T.; Ikuhara, Y. Enhanced Seebeck coefficient of quantum-confined electrons in SrTiO3/SrTi0.8Nb0.2O3 superlattices Appl. Phys. Lett. 2007, 91, 192105 10.1063/1.2809364
Garcia-Fernandez, P.; Verissimo-Alves, M.; Bilc, D. I.; Ghosez, P.; Junquera, J. First-principles modeling of the thermoelectric properties of SrTiO3/SrRuO3 superlattices Phys. Rev. B: Condens. Matter Mater. Phys. 2012, 86, 085305 10.1103/PhysRevB.86.085305
Astala, R.; Bristowe, P. D. First principles calculations of niobium substitution in strontium titanate J. Phys.: Condens. Matter 2002, 14, L149-L156 10.1088/0953-8984/14/6/103
Guo, X. G.; Chen, X. S.; Sun, L.; Lu, W. Electronic band structure of Nb doped SrTiO3 from first principles calculation Phys. Lett. A 2003, 317, 501-506 10.1016/j.physleta.2003.09.014
Zhang, C.; Wang, C. L.; Li, J. C.; Yang, K.; Zhang, Y. F.; Wu, Q. Z. Substitutional position and insulator-to-metal transition in Nb-doped SrTiO3 Mater. Chem. Phys. 2008, 107, 215-219 10.1016/j.matchemphys.2007.07.001
Yun, J. N.; Zhang, Z. Y. Electronic structure and optical properties of Nb-doped Sr2TiO4 by density function theory calculation Chin. Phys. B 2009, 18, 2945-2952 10.1088/1674-1056/18/7/055
Usui, H.; Shibata, S.; Kuroki, K. Origin of coexisting large Seebeck coefficient and metallic conductivity in the electron doped SrTiO3. and KTaO3 Phys. Rev. B: Condens. Matter Mater. Phys. 2010, 81, 205121 10.1103/PhysRevB.81.205121
Zhang, R. Z.; Wang, C. L.; Li, J. C.; Koumoto, K. Simulation of Thermoelectric Performance of Bulk SrTiO3 with Two-Dimensional Electron Gas Grain Boundaries J. Am. Ceram. Soc. 2010, 93, 1677-1681
Kinaci, A.; Sevik, C.; Çaǧin, T. Electronic transport properties of SrTiO3 and its alloys: Sr1-xLaxTiO3 and SrTi1-xMxO3 (M = Nb,Ta) Phys. Rev. B: Condens. Matter Mater. Phys. 2010, 82, 155114 10.1103/PhysRevB.82.155114
Baniecki, J. D.; Ishii, M.; Aso, H.; Kurihara, K.; Ricinschi, D. Density functional theory and experimental study of the electronic structure and transport properties of La, V, Nb, and Ta doped SrTiO3 J. Appl. Phys. 2013, 113, 013701 10.1063/1.4770360
Zou, D. F.; Liu, Y. Y.; Xie, S. H.; Lin, J. G.; Li, J. Y. Effect of strain on thermoelectric properties of SrTiO3: First-principles calculations Chem. Phys. Lett. 2013, 586, 159-163 10.1016/j.cplett.2013.09.036
Shirai, K.; Yamanaka, K. Mechanism behind the high thermoelectric power factor of SrTiO3 by calculating the transport coefficients J. Appl. Phys. 2013, 113, 053705 10.1063/1.4788809
Kahaly, M. U.; Schwingenschlögl, U. Thermoelectric performance enhancement of SrTiO3 by Pr doping J. Mater. Chem. A 2014, 2, 10379-10383 10.1039/c3ta13947f
Singsoog, K.; Seetawan, T.; Vora-Ud, A.; Thanachayanont, C. Theoretical Enhancement of Thermoelectric Properties of Sr1-xLaxTiO3 Integr. Ferroelectr. 2014, 155, 111-118 10.1080/10584587.2014.905364
Zhang, R.-Z.; Hu, X.-Y.; Guo, P.; Wang, C.-l. Thermoelectric transport coefficients of n-doped CaTiO3, SrTiO3 and BaTiO3: A theoretical study Phys. B 2012, 407, 1114 10.1016/j.physb.2012.01.083
Xing, G.; Sun, J.; Ong, K. P.; Fan, X.; Zheng, W.; Singh, D. J. Perspective: n-type oxide thermoelectrics via visual search strategies APL Mater. 2016, 4, 053201 10.1063/1.4941711
Roy, A. Estimates of the thermal conductivity and the thermoelectric properties of PbTiO3 from first principles Phys. Rev. B: Condens. Matter Mater. Phys. 2016, 93, 100101 10.1103/PhysRevB.93.100101
Himmetoglu, B.; Janotti, A. Transport properties of KTaO3 from first-principles J. Phys.: Condens. Matter 2016, 28, 065502 10.1088/0953-8984/28/6/065502
Khan, B.; Aliabad, H. A. R.; Razghandi, N.; Maqbool, M.; Asadabadi, S. J.; Ahmad, I. Structural and thermoelectric properties of pure and La, Y doped HoMnO3 for their use as alternative energy materials Comput. Phys. Commun. 2015, 187, 1-7 10.1016/j.cpc.2014.09.015
Zhang, F. P.; Zhang, X.; Lu, Q. M.; Zhang, J. X.; Liu, Y. Q.; Fan, R. F.; Zhang, G. Z. Doping induced electronic structure and estimated thermoelectric properties of CaMnO3 system Phys. B 2011, 406, 1258-1262 10.1016/j.physb.2011.01.011
Zhang, F. P.; Lu, Q. M.; Zhang, X.; Zhang, J. X. Electrical transport properties of CaMnO3 thermoelectric compound: a theoretical study J. Phys. Chem. Solids 2013, 74, 1859-1864 10.1016/j.jpcs.2013.07.019
Molinari, M.; Tompsett, D. A.; Parker, S. C.; Azough, F.; Freer, R. Structural, electronic and thermoelectric behaviour of CaMnO3 and CaMnO(3-x) J. Mater. Chem. A 2014, 2, 14109-14117 10.1039/C4TA01514B
Zhang, X. H.; Li, J. C.; Du, Y. L.; Wang, F. N.; Liu, H. Z.; Zhu, Y. H.; Liu, J.; Su, W. B.; Wang, C. L.; Mei, L. M. Thermoelectric properties of A-site substituted Lanthanide Ca0.75R0.25MnO3 J. Alloys Compd. 2015, 634, 1-5 10.1016/j.jallcom.2015.02.074
Srepusharawoot, P.; Pinitsoontorn, S.; Maensiri, S. Electronic structure of iron-doped misfit-layered calcium cobaltite Comput. Mater. Sci. 2016, 114, 64-71 10.1016/j.commatsci.2015.12.006
Ong, K. P.; Singh, D. J.; Wu, P. Analysis of the thermoelectric properties of n-type ZnO Phys. Rev. B: Condens. Matter Mater. Phys. 2011, 83, 115110 10.1103/PhysRevB.83.115110
Qua, X.; Wanga, W.; Lv, S.; Jia, D. Thermoelectric properties and electronic structure of Al-doped ZnO Solid State Commun. 2011, 151, 332-336 10.1016/j.ssc.2010.11.020
Jantrasee, S.; Pinitsoontorn, S.; Moontragoon, P. First-Principles Study of the Electronic Structure and Thermoelectric Properties of Al-Doped ZnO J. Electron. Mater. 2014, 43, 1689-1696 10.1007/s11664-013-2834-2
Alvarado, A.; Attapattu, J.; Zhang, Y.; Chen, C. F. Thermoelectric properties of rocksalt ZnO from first-principles calculations J. Appl. Phys. 2015, 118, 165101 10.1063/1.4934522
Huang, Z.; Lu, T. Y.; Wang, H. Q.; Zheng, J. C. Thermoelectric properties of the 3C, 2H, 4H, and 6H polytypes of the wide-band-gap semiconductors SiC, GaN, and ZnO AIP Adv. 2015, 5, 097204 10.1063/1.4931820
Chen, X.; Parker, D.; Du, M. H.; Singh, D. J. Potential thermoelectric performance of hole-doped Cu2O New J. Phys. 2013, 15, 043029 10.1088/1367-2630/15/4/043029
Lindsay, L.; Parker, D. S. Calculated transport properties of CdO: Thermal conductivity and thermoelectric power factor Phys. Rev. B: Condens. Matter Mater. Phys. 2015, 92, 144301 10.1103/PhysRevB.92.144301
Bayerl, D.; Kioupakis, E. Theoretical limits of thermoelectric figure of merit in n-type TiO2 polymorphs Phys. Rev. B: Condens. Matter Mater. Phys. 2015, 91, 165104 10.1103/PhysRevB.91.165104
Chumakov, Yu.; Xiong, S.-Y.; Santos, J. R.; Ferreira, I.; Termentzidis, K.; Pokropivny, A.; Cortona, P.; Volz, S. Ab Initio Calculations and Measurements of Thermoelectric Properties of V2O5 Films J. Electron. Mater. 2013, 42, 1597-1603 10.1007/s11664-012-2329-6
Pei, Y.; Shi, X.; LaLonde, A.; Wang, H.; Chen, L.; Snyder, G. J. Convergence of electronic bands for high performance bulk thermoelectrics Nature 2011, 473, 66 10.1038/nature09996
Parker, D.; Chen, X.; Singh, D. J. High Three-Dimensional Thermoelectric Performance from Low-Dimensional Bands Phys. Rev. Lett. 2013, 110, 146601 10.1103/PhysRevLett.110.146601
Bilc, D. I.; Hautier, G.; Waroquiers, D.; Rignanese, G.-M.; Ghosez, Ph. Low-Dimensional Transport and Large Thermoelectric Power Factors in Bulk Semiconductors by Band Engineering of Highly Directional Electronic States Phys. Rev. Lett. 2015, 114, 136601 10.1103/PhysRevLett.114.136601
Inaba, F.; Arima, T.; Ishikawa, T.; Katsufuji, T.; Tokura, Y. Change of electronic properties on the doping-induced insulator-metal transition in La1-xSrxVO3 Phys. Rev. B: Condens. Matter Mater. Phys. 1995, 52, 2221 10.1103/PhysRevB.52.R2221
Wang, Q.; Itaka, K.; Minami, H.; Kawaji, H.; Koinuma, H. Combinatorial pulsed laser deposition and thermoelectricity of (La1-xCax)VO3 composition-spread films Sci. Technol. Adv. Mater. 2004, 5, 543-547 10.1016/j.stam.2004.03.003
Bilc, D. I.; Orlando, R.; Shaltaf, R.; Rignanese, G.-M.; Iniguez, J.; Ghosez, Ph. Hybrid exchange-correlation functional for accurate prediction of the electronic and structural properties of ferroelectric oxides Phys. Rev. B: Condens. Matter Mater. Phys. 2008, 77, 165107 10.1103/PhysRevB.77.165107
Goffinet, M.; Hermet, P.; Bilc, D. I.; Ghosez, Ph. Hybrid functional study of prototypical multiferroic bismuth ferrite Phys. Rev. B: Condens. Matter Mater. Phys. 2009, 79, 014403 10.1103/PhysRevB.79.014403
Prikockyte, A.; Bilc, D.; Hermet, P.; Dubourdieu, C.; Ghosez, Ph. First-principles calculations of the structural and dynamical properties of ferroelectric YMnO3 Phys. Rev. B: Condens. Matter Mater. Phys. 2011, 84, 214301 10.1103/PhysRevB.84.214301
Perdew, J. P.; Zunger, A. Self-interaction correction to density-functional approximations for many-electron systems Phys. Rev. B: Condens. Matter Mater. Phys. 1981, 23, 5048 10.1103/PhysRevB.23.5048
Perdew, J. P.; Burke, K.; Ernzerhof, M. Generalized Gradient Approximation Made Simple Phys. Rev. Lett. 1996, 77, 3865 10.1103/PhysRevLett.77.3865
Wu, Z.; Cohen, R. E. More accurate generalized gradient approximation for solids Phys. Rev. B: Condens. Matter Mater. Phys. 2006, 73, 235116 10.1103/PhysRevB.73.235116
Dovesi, R.; Orlando, R.; Civalleri, B.; Roetti, C.; Saunders, V. R.; Zicovich-Wilson, C. M. CRYSTAL a computational tool for the ab initio study of the electronic properties of crystals Z. Kristallogr. - Cryst. Mater. 2005, 220, 571-573 10.1524/zkri.220.5.571.65065
Bredow, T.; Heitjans, P.; Wilkening, M. Electric field gradient calculations for LixTiS2 and comparison with 7Li NMR results Phys. Rev. B: Condens. Matter Mater. Phys. 2004, 70, 115111 10.1103/PhysRevB.70.115111
Piskunov, S.; Heifets, E.; Eglitis, R. I.; Borstel, G. Bulk properties and electronic structure of SrTiO3, BaTiO3, PbTiO3 perovskites: an ab initio HF/DFT study Comput. Mater. Sci. 2004, 29, 165-178 10.1016/j.commatsci.2003.08.036
Dovesi, R.; Roetti, C.; Freyria-Fava, C.; Prencipe, M.; Saunders, V. R. On the elastic properties of lithium, sodium and potassium oxide. An ab initio study Chem. Phys. 1991, 156, 11-19 10.1016/0301-0104(91)87032-Q
Peintinger, M. F.; Vilela Oliveira, D.; Bredow, T. Consistent gaussian basis sets of Triple-Zeta valence with polarization quality for solid-State Calculations J. Comput. Chem. 2013, 34, 451-459 10.1002/jcc.23153
Mackrodt, W. C.; Harrison, N. M.; Saunders, V. R.; Allan, N. L.; Towler, M. D.; Apra, E.; Dovesi, R. Ab initio Hartree-Fock calculations of CaO, VO, MnO and NiO Philos. Mag. A 1993, 68, 653-666 10.1080/01418619308213989
Cao, X.; Dolg, M. Segmented contraction scheme for small-core lanthanide pseudopotential basis sets J. Mol. Struct.: THEOCHEM 2002, 581, 139-147 10.1016/S0166-1280(01)00751-5
Madsen, G. K. H.; Singh, D. J. BoltzTraP. A code for calculating band-structure dependent quantities Comput. Phys. Commun. 2006, 175, 67-71 10.1016/j.cpc.2006.03.007
Mecholsky, N. A.; Resca, L.; Pegg, I. L.; Fornari, M. Theory of band warping and its effects on thermoelectronic transport properties Phys. Rev. B: Condens. Matter Mater. Phys. 2014, 89, 155131 10.1103/PhysRevB.89.155131
Delugas, P.; Filippetti, A.; Fiorentini, V.; Bilc, D. I.; Fontaine, D.; Ghosez, P. Spontaneous 2-Dimensional Carrier Confinement at the n-Type SrTiO3/LaAlO3 Interface Phys. Rev. Lett. 2011, 106, 166807 10.1103/PhysRevLett.106.166807
Muta, H.; Kurosaki, K.; Yamanaka, S. Thermoelectric properties of reduced and La-doped single-crystalline SrTiO3 J. Alloys Compd. 2005, 392, 306-309 10.1016/j.jallcom.2004.09.005
Ferroelectrics and Related Substances; Hellwege, K. H.; Hellwege, A. M., Eds.; New Series, Landolt-Bornstein; Springer Verlag: Berlin, 1969; Vol. 3, group III.
van Benthem, K.; Elsasser, C.; French, R. H. Bulk electronic structure of SrTiO3: Experiment and theory J. Appl. Phys. 2001, 90, 6156 10.1063/1.1415766
Ohta, S.; Nomura, T.; Ohta, H.; Koumoto, K. High-temperature carrier transport and thermoelectric properties of heavily La- or Nb-doped SrTiO3 single crystals J. Appl. Phys. 2005, 97, 034106 10.1063/1.1847723
van Mechelen, J. L. M.; van der Marel, D.; Grimaldi, C.; Kuzmenko, A. B.; Armitage, N. P.; Reyren, N.; Hagemann, H.; Mazin, I. I. Electron-Phonon Interaction and Charge Carrier Mass Enhancement in SrTiO3 Phys. Rev. Lett. 2008, 100, 226403 10.1103/PhysRevLett.100.226403
Pei, Y.; LaLonde, A. D.; Wang, H.; Snyder, G. J. Low effective mass leading to high thermoelectric performance Energy Environ. Sci. 2012, 5, 7963-7969 10.1039/c2ee21536e
Nie, Y. F.; Zhu, Y.; Lee, C.-H.; Kourkoutis, L. F.; Mundy, J. A.; Junquera, J.; Ghosez, Ph.; Baek, D. J.; Sung, S.; Xi, X. X. et al. Atomically precise interfaces from non-stoichiometric deposition Nature Commun. 2014, 5, 4530
Tsujimoto, Y.; Sathish, C. I.; Hong, K.-P.; Oka, K.; Azuma, M.; Guo, Y.; Matsushita, Y.; Yamaura, K.; Takayama-Muromachi, E. Crystal Structural, Magnetic, and Transport Properties of Layered Cobalt Oxyfluorides, Sr2CoO3+xF1-x (0 ≤ x ≤ 0.15) Inorg. Chem. 2012, 51, 4802-4809 10.1021/ic300116h
Bilc, D. I.; Mahanti, S. D.; Kanatzidis, M. G. Electronic transport properties of PbTe and AgPbmSbTe2+m systems Phys. Rev. B: Condens. Matter Mater. Phys. 2006, 74, 125202 10.1103/PhysRevB.74.125202
Hicks, L. D.; Harman, T. C.; Sun, X.; Dresselhaus, M. S. Experimental study of the effect of quantum-well structures on the thermoelectric figure of merit Phys. Rev. B: Condens. Matter Mater. Phys. 1996, 53, R10493 10.1103/PhysRevB.53.R10493
Ruiz, E.; Alvarez, S.; Alemany, P.; Evarestov, R. E. Electronic structure and properties of Cu2O Phys. Rev. B: Condens. Matter Mater. Phys. 1997, 56, 7189 10.1103/PhysRevB.56.7189