BAND-STRUCTURE ENHANCEMENT OF THE INDIRECT FORBIDDEN TRANSITIONS

被引：7

作者：

CAMASSEL, J

PASCUAL, J

MATHIEU, H

机构：

[1] Centre d'Etudes d'Electronique des Solides, Université des Sciences et Techniques du Languedoc

来源：

PHYSICAL REVIEW B | 1979年 / 20卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.20.5292

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an experimental investigation of the resonant enhancement of the indirect forbidden transitions near a direct-indirect crossover. Near-resonance conditions have been achieved in TiO2 by tuning the relative energy positions of a direct forbidden gap (3.031 eV) with respect to an indirect one (3.049 eV). We find a band-structure enhancement of the indirect absorption strength when crossing the direct-forbidden gap. The quantitative details of the experiment can be satisfactorily accounted for by a simple model which includes (i) the stress-induced breaking of the selection rules and (ii) the resonance effect. Uniaxial compressions up to 24 kbars in [100] direction have been found necessary to tune the band gaps. © 1979 The American Physical Society.

引用

页码：5292 / 5296

页数：5

共 11 条

[1] ELECTRONIC BAND-STRUCTURE OF TITANIUM-DIOXIDE [J].

DAUDE, N ;

GOUT, C ;

JOUANIN, C .

PHYSICAL REVIEW B, 1977, 15 (06) :3229-3235

[2]

DJEVAHIRDJIAN SA, 1870, MONTHEY

[3]

ELLIOTT RJ, 1957, PHYS REV, V108, P1834

[4]

JORDAN JP, UNPUBLISHED

[5] DIRECT STUDY OF NATURE OF NITROGEN BOUND-STATES IN GAAS1-XPX-N [J].

KLEIMAN, GG ;

NELSON, RJ ;

HOLONYAK, N ;

COLEMAN, JJ .

PHYSICAL REVIEW LETTERS, 1976, 37 (06) :375-378

[6] LUMINESCENCE AND DIRECT EXPERIMENTAL-OBSERVATIONS OF BAND-STRUCTURE EFFECTS IN NITROGEN-DOPED GAXIN1-XP ALLOYS [J].

MARIETTE, H ;

CHEVALLIER, J .

JOURNAL OF APPLIED PHYSICS, 1977, 48 (03) :1200-1205

[7] UNIAXIAL STRESS DEPENDENCE OF THE DIRECT-FORBIDDEN AND INDIRECT-ALLOWED TRANSITIONS OF TIO2 [J].

MATHIEU, H ;

PASCUAL, J ;

CAMASSEL, J .

PHYSICAL REVIEW B, 1978, 18 (12) :6920-6929

[8]

MATHIEU H, 1976, 13TH P INT C PHYS SE

[9] FINE-STRUCTURE IN THE INTRINSIC ABSORPTION-EDGE OF TIO2 [J].

PASCUAL, J ;

CAMASSEL, J ;

MATHIEU, H .

PHYSICAL REVIEW B, 1978, 18 (10) :5606-5614

[10] RESOLVED QUADRUPOLAR TRANSITION IN TIO2 [J].

PASCUAL, J ;

CAMASSEL, J ;

MATHIEU, H .

PHYSICAL REVIEW LETTERS, 1977, 39 (23) :1490-1493

← 1 2 →