DEPENDENCE OF LOW-ENERGY EXCITATIONS ON AVERAGE COORDINATION-NUMBER IN AMORPHOUS ASXSE1-X

被引：2

作者：

BRAND, O ^{[1
]}

VONLOHNEYSEN, H ^{[1
]}

BLACHNIK, R ^{[1
]}

机构：

[1] UNIV OSNABRUCK,W-4500 OSNABRUCK,GERMANY

来源：

PHYSICA B | 1991年 / 169卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(91)90329-D

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A systematic study of the low-temperature specific heat (0.1 K less-than-or-equal-to T less-than-or-equal-to 2 K) of As(X)Se(1-x) glasses is reported. The linear specific-heat contribution which is attributed to low-energy excitations arising from two-level tunneling states shows a pronounced dependence on the average coordination number m = x + 2 with a minimum in the vicinity of the threshold of rigidity percolation m(c) = 2.4.

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页码：567 / 568

页数：2

相关论文

共 13 条

[1] THERMAL-PROPERTIES OF A TETRAHEDRALLY BONDED AMORPHOUS SOLID - CDGEAS2 [J].

CAHILL, DG ;

POHL, RO .

PHYSICAL REVIEW B, 1988, 37 (15) :8773-8780

[2] FLOPPY MODES IN NETWORK GLASSES [J].

CAI, Y ;

THORPE, MF .

PHYSICAL REVIEW B, 1989, 40 (15) :10535-10542

[3] ULTRASONIC STUDY OF PERCOLATION RIGIDITY IN SE-GE GLASSES [J].

DUQUESNE, JY ;

BELLESSA, G .

EUROPHYSICS LETTERS, 1989, 9 (05) :453-458

[4] RAYLEIGH-WAVES IN AMORPHOUS-GERMANIUM AT LOW-TEMPERATURE - EVIDENCE FOR THE EXISTENCE OF TUNNELLING DEFECTS [J].

DUQUESNE, JY ;

BELLESSA, G .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1983, 16 (03) :L65-L69

[5] THERMAL-CONDUCTIVITY OF AMORPHOUS-GERMANIUM AT LOW-TEMPERATURES [J].

GRAEBNER, JE ;

ALLEN, LC .

PHYSICAL REVIEW B, 1984, 29 (10) :5626-5633

[6] THE HEAT-CAPACITIES OF ARSENIC, PHOSPHORUS AND GEXSE1-X GLASSES BELOW 1-K [J].

JONES, DP ;

PHILLIPS, WA ;

LASJAUNIAS, JC .

SOLID STATE COMMUNICATIONS, 1982, 41 (03) :255-258

[7] TOPOLOGY OF COVALENT NON-CRYSTALLINE SOLIDS .1. SHORT-RANGE ORDER IN CHALCOGENIDE ALLOYS [J].

PHILLIPS, JC .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1979, 34 (02) :153-181

[8]

Phillips W. A., 1981, AMORPHOUS SOLIDS

[9] INTRINSIC LOW-TEMPERATURE THERMAL PROPERTIES OF GLASSES [J].

STEPHENS, RB .

PHYSICAL REVIEW B, 1976, 13 (02) :852-865

[10] ELASTIC PROPERTIES OF COVALENT GLASSES [J].

TANAKA, K .

SOLID STATE COMMUNICATIONS, 1986, 60 (03) :295-297