Thermodynamics of a charged fermion layer at high r(s) values

被引:57
作者
Shapira, S
Sivan, U
Solomon, PM
Buchstab, E
Tischler, M
Yoseph, GB
机构
[1] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL
[2] IBM CORP,TJ WATSON RES CTR,YORKTOWN HTS,NY 10598
[3] TECHNION ISRAEL INST TECHNOL,INST SOLID STATE,IL-32000 HAIFA,ISRAEL
关键词
D O I
10.1103/PhysRevLett.77.3181
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The chemical potential mu of a hole layer is mapped as a function of temperature and density p. We present the first investigation of the crossover from the strongly interacting degenerate regime to the classical ideal gas limit. The low temperature inverse compressibility, kappa(-1)= p(2) partial derivative mu/partial derivative p, is negative and temperature independent. At T approximate to 17 K temperature dependence commences abruptly: kappa(-1) turns less negative with rising T and eventually reverses sign. An ideal classical gas is attained at temperatures comparable to the interaction energy, more than an order of magnitude larger than the Fermi energy.
引用
收藏
页码:3181 / 3184
页数:4
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