PINNING AND CONDUCTIVITY OF A 2-DIMENSIONAL CHARGE-DENSITY WAVE IN A STRONG MAGNETIC-FIELD

被引:73
作者
NORMAND, BGA [1 ]
LITTLEWOOD, PB [1 ]
MILLIS, AJ [1 ]
机构
[1] AT&T BELL LABS,MURRAY HILL,NJ 07974
来源
PHYSICAL REVIEW B | 1992年 / 46卷 / 07期
关键词
D O I
10.1103/PhysRevB.46.3920
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We investigate the dynamics of a two-dimensional electron system in a high magnetic field in the Wigner-crystalline regime where charge-density-wave correlations extend over a distance large compared with the interelectronic spacing. We determine the effects of weak disorder and of screening by uncondensed carriers of the internal electric fields produced by crystal deformation. We show, in agreement with previous work, that in the presence of disorder a dispersing, albeit inhomogeneously broadened mode exists even at wavelengths long compared with the positional correlation length. We obtain expressions for the line shape of the mode in terms of properties of the disorder. We compare our results to presently available data, concluding that present observations imply a correlation length of order one lattice constant at very large fields. However, threshold field measurements at smaller fields near the nu = 1/5 fractional quantum Hall plateau imply much larger correlation lengths, suggesting an anomalous field dependence of system properties.
引用
收藏
页码:3920 / 3934
页数:15
相关论文
共 37 条
[1]   OBSERVATION OF A MAGNETICALLY INDUCED WIGNER SOLID [J].
ANDREI, EY ;
DEVILLE, G ;
GLATTLI, DC ;
WILLIAMS, FIB ;
PARIS, E ;
ETIENNE, B .
PHYSICAL REVIEW LETTERS, 1988, 60 (26) :2765-2768
[2]   OBSERVATION OF A MAGNETICALLY INDUCED WIGNER SOLID - REPLY [J].
ANDREI, EY ;
DEVILLE, G ;
GLATTLI, DC ;
WILLIAMS, FIB ;
PARIS, E ;
ETIENNE, B .
PHYSICAL REVIEW LETTERS, 1989, 62 (08) :973-973
[3]   A THEORY OF THE WEAKLY PINNED FROHLICH MODE [J].
BAIER, T ;
WONNEBERGER, W .
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1990, 79 (02) :211-222
[4]   SOME STATIC AND DYNAMICAL PROPERTIES OF A 2-DIMENSIONAL WIGNER CRYSTAL [J].
BONSALL, L ;
MARADUDIN, AA .
PHYSICAL REVIEW B, 1977, 15 (04) :1959-1973
[5]   VARIATIONAL THEORY FOR DISORDERED VORTEX LATTICES [J].
BOUCHAUD, JP ;
MEZARD, M ;
YEDIDIA, JS .
PHYSICAL REVIEW LETTERS, 1991, 67 (27) :3840-3843
[6]   NOVEL MAGNETOOPTICAL BEHAVIOR IN THE WIGNER-SOLID REGIME [J].
BUHMANN, H ;
JOSS, W ;
VONKLITZING, K ;
KUKUSHKIN, IV ;
PLAUT, AS ;
MARTINEZ, G ;
PLOOG, K ;
TIMOFEEV, VB .
PHYSICAL REVIEW LETTERS, 1991, 66 (07) :926-929
[7]   PHASE SLIPS AND THE INSTABILITY OF THE FUKUYAMA-LEE-RICE MODEL OF CHARGE-DENSITY WAVES [J].
COPPERSMITH, SN .
PHYSICAL REVIEW LETTERS, 1990, 65 (08) :1044-1047
[8]   DIVERGING STRAINS IN THE PHASE-DEFORMATION MODEL OF SLIDING CHARGE-DENSITY WAVES [J].
COPPERSMITH, SN ;
MILLIS, AJ .
PHYSICAL REVIEW B, 1991, 44 (15) :7799-7807
[9]   PHONONS AS COLLECTIVE MODES - THE CASE OF A 2-DIMENSIONAL WIGNER CRYSTAL IN A STRONG MAGNETIC-FIELD [J].
COTE, R ;
MACDONALD, AH .
PHYSICAL REVIEW LETTERS, 1990, 65 (21) :2662-2665
[10]   LOW-TEMPERATURE DIVERGENCE OF THE CHARGE-DENSITY-WAVE VISCOSITY IN K0.30MOO3, (TASE4)2I, AND TAS3 [J].
FLEMING, RM ;
CAVA, RJ ;
SCHNEEMEYER, LF ;
RIETMAN, EA ;
DUNN, RG .
PHYSICAL REVIEW B, 1986, 33 (08) :5450-5455