1.
Phys Rev Lett
; 93(8): 087203, 2004 Aug 20.
Article
in English
| MEDLINE
| ID: mdl-15447221
ABSTRACT
Besides being an ancient pigment, BaCuSi2O6 is a quasi-2D magnetic insulator with a gapped spin dimer ground state. The application of strong magnetic fields closes this gap, creating a gas of bosonic spin triplet excitations. The topology of the spin lattice makes BaCuSi2O6 an ideal candidate for studying the Bose-Einstein condensation of triplet excitations as a function of the external magnetic field, which acts as a chemical potential. In agreement with quantum Monte Carlo numerical simulations, we observe a distinct lambda anomaly in the specific heat together with a maximum in the magnetic susceptibility upon cooling down to liquid helium temperatures.
2.
Phys Rev B Condens Matter
; 54(21): 15163-15170, 1996 Dec 01.
Article
in English
| MEDLINE
| ID: mdl-9985577
3.
Phys Rev B Condens Matter
; 54(10): R6835-R6837, 1996 Sep 01.
Article
in English
| MEDLINE
| ID: mdl-9984392
4.
Phys Rev B Condens Matter
; 53(17): 11642-11646, 1996 May 01.
Article
in English
| MEDLINE
| ID: mdl-9982787
5.
Phys Rev B Condens Matter
; 52(5): 3533-3539, 1995 Aug 01.
Article
in English
| MEDLINE
| ID: mdl-9981476
6.
Phys Rev B Condens Matter
; 50(22): 16468-16474, 1994 Dec 01.
Article
in English
| MEDLINE
| ID: mdl-9976035
7.