Mobility Enhancement in Square Quantum Wells: Symmetric Modulation of the Envelop Wave Function

Doan Nhat Quang, Nguyen Huyen Tung, Nguyen Trung Hong, Tran Thi Hai

Abstract


We present a theoretical study of the effects from symmetric modulation of the envelop wave function on quantum transport in square quantum wells (QWs). Within the variational approach we obtain analytic expressions for the carrier distribution and their scattering in symmetric two-side doped square QWs. Roughness-induced scattering are found significantly weaker than those in the asymmetric one-side doped counterpart. Thus, we propose symmetric modulation of the wave function as an efficient method for enhancement of the roughness-limited QW mobility. Our theory is able to well reproduce the recent experimental data about low-temperature transport of electrons and holes in two-side doped square QWs, e.g., the mobility dependence on the channel width, which have not been explained so far.

Full Text:

PDF

References


T. Ando, A. B. Fowler, and F. Stern, Rev. Mod. Phys. 54 (1982) 437.

M. V. Fischetti and S. E. Laux, J. Appl. Phys. 80 (1996) 2234.

T. Dziekan,P. Zahn, V. Meded, and S. Mirbt, Phys. Rev. B 75, 195213 (2007).

M. V. Fischetti, F. G´amiz, and W. H¨ansch, J. Appl. Phys. 92 (2002) 7320.

J. E. Schirbir, I. J. Fritz, and L. R. Dawson, Appl. Phys. Lett. 46 (1985) 187.

M. L. Lee, C. W. Leitz, Z. Cheng, A. J. Pitera, T. Langdo, M. T. Currie, G. Taraschi, E. A. Fitzgerald,

and D. A. Antoniadis, Appl. Phys. Lett. 79 (2001) 3344.

M. Myronov, T. Irisawa, S. Koh, O. A. Mironov, T. E. Whall, E. H. C. Parker, and Y. Shiraki, J.

Appl. Phys. 97 (2005) 083701.

R. E. Belford, B. P. Guo, Q. Xu, S. Sood, A. A. Thrift, A. Teren, A. Acosta, L. A. Bosworth, and J.

S. Zell, J. Appl. Phys. 100 (2006) 064903.

J. D. Sau and M. L. Cohen, Phys. Rev. B 75 (2007) 045208.

DOAN NHAT QUANG, NGUYEN HUYEN TUNG, NGUYEN TRUNG HONG, AND TRAN THI HAI

R. Dingle, H. L. St¨ormer, A. C. Gossard, and W. Wiegmann, Appl. Phys. Lett. 33 (1978) 665.

T. Tsuchiya and T. Ando, Phys. Rev. B 48 (1993) 4599.

G. Bastard, Wave Mechanics Applied to Semiconductor Heterostructures (Les Editions de Physique,

Paris, 1988).

R. M. Feenstra and M. A. Lutz, J. Appl. Phys. 78 (1995) 6091.

D. N. Quang, V. N. Tuoc, N. H. Tung, and T. D. Huan, Phys. Rev. Lett. 89 (2002) 077601; Phys.

Rev. B 68 (2003) 153306.

D. N. Quang and N. H. Tung, Phys. Rev. B 77 (2008) 125335.

D. N. Quang, N. H. Tung, D. T. Hien, and T. T. Hai, J. Appl. Phys. 104 (2008) 113711.

Y. H. Xie, D. Monroe, E. A. Fitzgerald, P. J. Silverman, F. A. Thiel, and G. P. Watson, Appl. Phys.

Lett. 63 (1993) 2263.

K. L. Campman, H. Schmidt, A. Imamoglu, and A. C. Gossard, Appl. Phys. Lett. 69 (1996) 2554.

H. C¸ elik, M. Cankurtaran, A. Bayrakli, E. Tiras, and N. Balkan, Semicon. Sci. Technol. 12 (1997)

N. Balkan, R. Gupta, M. Cankurtaran, H. C¸ elik, A. Bayrakli, E. Tiras, and M. C¸ . Arikan, Superlattices

Microstruct. 22 (1997) 263.

M. Cankurtaran, H. C¸ elik, E. Tiras, A. Bayrakli, and N. Balkan, Phys. Status Solidi B 207 (1998)

R. J. H. Morris, T. J. Grasby, R. Hammond, M. Myronov, O. A. Mironov, D. R. Leadley, T. E. Whall,

E. H. C. Parker, M. T. Currie, C. W. Leitz, and E. A. Fitzgerald, Semicond. Sci. Technol. 19 (2004)

L106.

C. Gerl, S. Schmult, H.-P. Tranitz, C. Mitzkus, and W. Wegscheider, Appl. Phys. Lett. 86 (2005)

C. Gerl, S. Schmult, U. Wurstbauer, H.-P. Tranitz, C. Mizkus, and W. Wegscheider, Physica E 32

(2006) 258.

B. R¨ossner, H. von K¨anel, D. Chrastina, G. Isella, and B. Batlogg, Thin Solid Films 508 (2006) 351.

M. Myronov, K. Sawano, and Y. Shiraki, Appl. Phys. Lett. 88 (2006) 252115.

F. Szmulowicz, S. Elhamri, H. J. Haugan, G. J. Brown, and W. C. Mitchel, J. Appl. Phys. 101 (2007)

C. G. Van de Walle and R. M. Martin, Phys. Rev. B 34 (1986) 5621.

A. Gold, Phys. Rev. B 35 (1987) 723; 38 (1988) 10798.

A. Kahan, M. Chi, and L. Friedman, J. Appl. Phys. 75, 8012 (1994).

A. Gold, J. Appl. Phys. 1033 (2008) 043718.




DOI: https://doi.org/10.15625/0868-3166/20/3/2212 Display counter: Abstract : 42 views. PDF : 45 views.

Refbacks

  • There are currently no refbacks.




Editorial Office:

Communications in Physics

1st Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7102 

Email: cip@vjs.ac.vn

Copyright by