1.
Phys Rev Lett
; 84(15): 3434-7, 2000 Apr 10.
Article
in English
| MEDLINE
| ID: mdl-11019108
ABSTRACT
We present the first results on the low-frequency dynamical and transport properties of random antiferromagnetic spin chains at low temperature (T). We obtain the momentum and frequency dependent dynamic structure factor in the random singlet (RS) phases of both spin-1/2 and spin-1 chains, as well as in the random dimer phase of spin-1/2 chains. We also show that the RS phases are unusual "spin-metals" with divergent low-frequency conductivity at T = 0, and follow the spin conductivity through "metal-insulator" transitions tuned by the strength of dimerization or Ising anisotropy in the spin-1/2 case and by the strength of disorder in the spin-1 case.
2.
Phys Rev B Condens Matter
; 54(17): 12413-12420, 1996 Nov 01.
Article
in English
| MEDLINE
| ID: mdl-9985104
3.
Phys Rev B Condens Matter
; 54(5): 3336-3342, 1996 Aug 01.
Article
in English
| MEDLINE
| ID: mdl-9986233
4.
Phys Rev B Condens Matter
; 53(22): 15193-15200, 1996 Jun 01.
Article
in English
| MEDLINE
| ID: mdl-9983316
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6.
Phys Rev B Condens Matter
; 52(9): 6211-6214, 1995 Sep 01.
Article
in English
| MEDLINE
| ID: mdl-9981846
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8.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics
; 52(1): 270-284, 1995 Jul.
Article
in English
| MEDLINE
| ID: mdl-9963430
9.
Phys Rev B Condens Matter
; 51(10): 6575-6587, 1995 Mar 01.
Article
in English
| MEDLINE
| ID: mdl-9977192
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Phys Rev B Condens Matter
; 50(2): 663-667, 1994 Jul 01.
Article
in English
| MEDLINE
| ID: mdl-9975727
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18.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics
; 48(4): 2528-2535, 1993 Oct.
Article
in English
| MEDLINE
| ID: mdl-9960887
19.
20.
Phys Rev B Condens Matter
; 48(6): 3844-3852, 1993 Aug 01.
Article
in English
| MEDLINE
| ID: mdl-10008834