Two dimensional phonon-drag thermopower in Si0.87Ge0.13/Si (001) heterostructure grown by MBE

被引：4

作者：

Agan, S ^{[1
]}

Mironov, OA ^{[1
]}

Tsaousidou, M ^{[1
]}

Whall, TE ^{[1
]}

Parker, EHC ^{[1
]}

Butcher, PN ^{[1
]}

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

MICROELECTRONIC ENGINEERING | 2000年 / 51-2卷

关键词：

Si; heterostructure; thermopower and phonon-drag;

D O I：

10.1016/S0167-9317(99)00514-6

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Results of thermoelectric power measurements are presented for two dimensional hole gas (2DHG) formed at the normal interface of modulation boron doped Si/Si0.87Ge0.13 /(001) Si fully strained heterostructure for the first time in the temperature range 1.5 to 25 K. The modulation-doped 2DHG sample has carrier sheet density p(s) of 2 x 10(11) cm(-2) and its mobility value mu is 1.11 x 10(4) cm(2) V-1 s(-1) at liquid He-4 temperature. The thermoelectric power is found to be dominated by the phonon drag contribution. A fit to phonon-drag thermopower theory yields a value of 5.5 eV for the screened acoustic phonon deformation potential. A Kohn anomaly is observed at similar to 3.5+/-0.5 K. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：527 / 534

页数：8

共 7 条

[1]

Ashcroft N. W., 1973, SOLID STATE PHYS

[2] A CALCULATION OF THE PHONON-DRAG CONTRIBUTION TO THE THERMOPOWER OF QUASI-2D ELECTRONS COUPLED TO 3D PHONONS .1. GENERAL-THEORY [J].

CANTRELL, DG ;

BUTCHER, PN .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1987, 20 (13) :1985-1992

[3] Thermoelectric and hot-electron properties of a silicon inversion layer [J].

Fletcher, R ;

Pudalov, VM ;

Feng, Y ;

Tsaousidou, M ;

Butcher, PN .

PHYSICAL REVIEW B, 1997, 56 (19) :12422-12428

[4]

Gallager B.L., 1992, HDB SEMICONDUCTORS, V1, P817

[5] Thermoelectric power of the Si/Si0.8Ge0.2 two-dimensional hole gas [J].

Mironov, OA ;

Gerleman, IG ;

Phillips, PJ ;

Parker, EHC ;

Tsaousidou, M ;

Butcher, PN ;

Whall, TE .

THIN SOLID FILMS, 1997, 294 (1-2) :182-185

[6]

Wiley J. D., 1975, SEMICONDUCT SEMIMET, V10, P91

[7] SEMICLASSICAL MAGNETOTHERMOPOWER OF A QUASI-2-DIMENSIONAL ELECTRON-GAS [J].

ZIANNI, X ;

BUTCHER, PN ;

KEARNEY, MJ .

PHYSICAL REVIEW B, 1994, 49 (11) :7520-7527

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