[en] Using advanced ab initio calculations, we describe the formation and confinement of a two-dimensional electron gas in short-period (≃4-nm) Nb-doped SrTiO3 superlattices as a function of Nb doping. We predict complete two-dimensional confinement for doping concentrations higher than 70%. In agreement with previous observations, we find a large thermopower enhancement at room temperature. However, this effect is primarily determined by dilution of the mobile charge over a multitude of weakly occupied bands. As a general rule, we conclude that thermopower in similar heterostructures will be more enhanced by weak, rather than tight, spatial confinement.
Disciplines :
Physics
Author, co-author :
Delugas, P.
Filippetti, A.
Verstraete, Matthieu ; Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures
Pallecchi, I.
Marré, D.
Fiorentini, V.
Language :
English
Title :
Doping-induced dimensional crossover and thermopower burst in Nb-doped SrTiO$_3$ superlattices
Publication date :
2013
Journal title :
Physical Review. B, Condensed Matter and Materials Physics
ISSN :
1098-0121
eISSN :
1550-235X
Publisher :
American Physical Society, Woodbury, United States - New York
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Bibliography
A. Ohtomo and H. Y. Hwang, Nature (London) NATUAS 0028-0836 10.1038/nature02308 427, 423 (2004); (Pubitemid 38168490)
S. Thiel, G. Hammer, A. Schmehl, C. W. Schneider, and J. Mannhart, Science SCIEAS 0036-8075 10.1126/science.1131091 313, 1942 (2006); (Pubitemid 44497997)
M. Huijben, G. Rijnders, D. H. A. Blank, S. Bals, S. Van Aert, J. Verbeeck, G. Van Tendeloo, A. Brinkman, and H. Hilgenkamp, Nat. Mater. 1476-1122 10.1038/nmat1675 5, 556 (2006); (Pubitemid 43993078)
N. Reyren, S. Thiel, A. D. Caviglia, L. Fitting Kourkoutis, G. Hammerl, C. Richter, C. W. Schneider, T. Kopp, A.-S. Rüetschi, D. Jaccard, M. Gabay, D. A. Muller, J.-M. Triscone, and J. Mannhart, Science SCIEAS 0036-8075 10.1126/science.1146006 317, 1196 (2007);
I. Pallecchi, M. Codda, E. Galleani d'Agliano, D. Marré, A. D. Caviglia, N. Reyren, S. Gariglio, and J.-M. Triscone, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.81.085414 81, 085414 (2010).
R. Venkatasubramanian, E. Siivola, T. Colpitts, and B. O'Quinn, Nature (London) NATUAS 0028-0836 10.1038/35098012 413, 597 (2001). (Pubitemid 32964053)
T. C. Harman, P. J. Taylor, M. P. Walsh, and B. E. LaForge, Science SCIEAS 0036-8075 10.1126/science.1072886 297, 2229 (2002).
M. S. Dresselhaus, G. Chen, M. Y. Tang, R. Yang, H. Lee, D. Wang, Z. Ren, J.-P. Fleurial, and P. Gogna, Adv. Mater. ADVMEW 0935-9648 10.1002/adma. 200600527 19, 1043 (2007). (Pubitemid 46942265)
C. B. Vining, Nature (London) NATUAS 0028-0836 10.1038/423391a 423, 391 (2007).
K. Biswas, J. He, I. D. Blum, C.-I. Wu, T. P. Hogan, D. N. Seidman, V. P. Dravid, and M. G. Kanatzidis, Nature (London) NATUAS 0028-0836 10.1038/nature11439 489, 414 (2012).
L. E. Bell, Science SCIEAS 0036-8075 10.1126/science.1158899 321, 1457 (2008).
H. Ohta, S. Kim, Y. Mune, T. Mizoguchi, K. Nomura, S. Ohta, T. Nomura, Y. Nakanishi, Y. Ikuhara, M. Hirano, H. Hosono, and K. Koumoto, Nat. Mater. 1476-1122 10.1038/nmat1821 6, 129 (2007). (Pubitemid 46197649)
B. Jalan and S. Stemmer, Appl. Phys. Lett. APPLAB 0003-6951 10.1063/1.3471398 97, 042106 (2010).
Y. Mune, H. Ohta, K. Koumoto, T. Mizoguchi, and Y. Ikuhara, Appl. Phys. Lett. APPLAB 0003-6951 10.1063/1.2809364 91, 192105 (2007). (Pubitemid 350097884)
H. Ohta, Y. Mune, K. Koumoto, T. Mizoguchi, and Y. Ikuhara, Thin Solid Films THSFAP 0040-6090 10.1016/j.tsf.2007.10.034 516, 5916 (2008). (Pubitemid 351726012)
L. D. Hicks and M. S. Dresselhaus, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.47.12727 47, 12727 (1993);
L. D. Hicks, T. C. Harman, X. Sun, and M. S. Dresselhaus, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.53.R10493 53, R10493 (1996).
J. O. Sofo and G. D. Mahan, Appl. Phys. Lett. APPLAB 0003-6951 10.1063/1.112607 65, 2690 (1994).
D. A. Broido and T. L. Reinecke, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.51.13797 51, 13797 (1995);
D. A. Broido and T. L. Reinecke, Appl. Phys. Lett. APPLAB 0003-6951 10.1063/1.114998 67, 1170 (1995).
H. Usui, S. Shibata, and K. Kuroki, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.81.205121 81, 205121 (2010).
A. Filippetti, P. Delugas, M. J. Verstraete, I. Pallecchi, A. Gadaleta, D. Marré, D. F. Li, S. Gariglio, and V. Fiorentini, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.86.195301 86, 195301 (2012).
T. Tomio, H. Miki, H. Tabata, T. Kawai, and Shichio Kawai, J. Appl. Phys. JAPIAU 0021-8979 10.1063/1.358404 76, 5886 (1994).
A. Filippetti, C. D. Pemmaraju, S. Sanvito, P. Delugas, D. Puggioni, and V. Fiorentini, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.84.195127 84, 195127 (2011);
A. Filippetti and N. A. Spaldin, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.67.125109 67, 125109 (2003);
A. Filippetti and V. Fiorentini, Eur. Phys. J. B EPJBFY 1434-6028 10.1140/epjb/e2009-00313-2 71, 139 (2009).
P. Delugas, A. Filippetti, V. Fiorentini, D. I. Bilc, D. Fontaine, and P. Ghosez, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.106.166807 106, 166807 (2011).
D. Puggioni, A. Filippetti, and V. Fiorentini, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.86.195132 86, 195132 (2012).
G. Madsen and D. Singh, Comput. Phys. Commun. CPHCBZ 0010-4655 10.1016/j.cpc.2006.03.007 175, 67 (2006). (Pubitemid 43816946)
T. Okuda, K. Nakanishi, S. Miyasaka, and Y. Tokura, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.63.113104 63, 113104 (2001).
K. Durczewski and M. Ausloos, Phys. Rev. B PRBMDO 1098-0121 10.1103/PhysRevB.61.5303 61, 5303 (2000).
S. Ohta, T. Nomura, H. Ohta, and K. Noumoto, J. Appl. Physiol. JAPIAU 0021-8979 10.1063/1.1847723 97, 034106 (2005). (Pubitemid 40232259)
M. Cutler and N. F. Mott, Phys. Rev. PHRVAO 0031-899X 10.1103/PhysRev.181.1336 181, 1336 (1969).
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