DYNAMICS OF HE-3 IMPURITIES IN HE-4 FILMS

被引:2
作者
AGNOLET, G
CLEMENTS, BE
KROTSCHECK, E
SAARELA, M
机构
[1] JOHANNES KEPLER UNIV,INST THEORET PHYS,A-4040 LINZ,AUSTRIA
[2] UNIV OULU,DEPT THEORET PHYS,SF-90570 OULU,FINLAND
关键词
D O I
10.1007/BF00753335
中图分类号
O59 [应用物理学];
学科分类号
摘要
Using a microscopic theory we calculate the binding energy of He-3 impurities in films of He-4 absorbed to a graphite substrate. Without adjustable parameters, we obtain excellent agreement with the experimental binding energies for the ground state of the 3He impurity. By introducing a time-dependent variational wave function, the impurity atom acquires a hydrodynamic effective mass for its motion parallel to the surface due to hydrodynamic backflow, and the excited states have a finite lifetime. When these effects are included, both the energy of the first excited state of the impurity, and the effective mass of the ground state, agree well with experimental data. A comparison with recent density functional results is carried out. It is shown that the substrate bound states on strong potentials are spurious and due to the inappropriate treatment of the effective mass within that theory.
引用
收藏
页码:445 / 451
页数:7
相关论文
共 17 条
[1]   EQUATION OF STATE FOR HE-3 SUBMONOLAYERS PHYSISORBED IN HE-4-FILM SURFACE-STATES - THERMAL HARTREE-FOCK APPROXIMATION [J].
ANDERSON, RH ;
MILLER, MD .
PHYSICAL REVIEW B, 1989, 40 (04) :2109-2119
[2]  
ANDREEV AF, 1966, ZH EKSP TEOR FIZ, V23, P939
[3]   HE-3 IN HE-4 FILMS - HOMOGENEOUS TWO-DIMENSIONAL BEHAVIOR [J].
BHATTACHARYYA, BK ;
DIPIRRO, MJ ;
GASPARINI, FM .
PHYSICAL REVIEW B, 1984, 30 (09) :5029-5040
[4]   STRUCTURE OF BOSON QUANTUM FILMS [J].
CLEMENTS, BE ;
EPSTEIN, JL ;
KROTSCHECK, E ;
SAARELA, M .
PHYSICAL REVIEW B, 1993, 48 (10) :7450-7470
[5]  
EDWARDS DO, 1978, PROGR LOW TEMPERAT A, V7, P282
[6]   EFFECTIVE MASS OF HE-3 IMPURITIES IN HE-4 FILMS [J].
EPSTEIN, JL ;
KROTSCHECK, E ;
SAARELA, M .
PHYSICAL REVIEW LETTERS, 1990, 64 (04) :427-430
[7]  
Feenberg E., 1969, THEORY QUANTUM FLUID
[8]  
HALLOCK RB, 1995, COMMUNICATION
[9]   NMR OBSERVATION OF STEPS IN THE MAGNETIZATION OF HE-3 IN THIN HE-3(-)4 MIXTURE FILMS [J].
HIGLEY, RH ;
SPRAGUE, DT ;
HALLOCK, RB .
PHYSICAL REVIEW LETTERS, 1989, 63 (23) :2570-2573
[10]   QUASIPARTICLE INTERACTION AND MAGNETIC-SUSCEPTIBILITY OF HE-3 ON HE-4 FILMS [J].
KROTSCHECK, E ;
SAARELA, M ;
EPSTEIN, JL .
PHYSICAL REVIEW LETTERS, 1988, 61 (15) :1728-1731