Critical properties at the field-induced Bose-Einstein condensation on NiCl2-4SC(NH2)2

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Physical Review Letters

OSTI ID:962298

Sengupta, Pinaki ^[1]; Al-hassenieh, Khaled A ^[1]; Jaime, Macelo ^[1]; Paduan-filho, Armando ^[1]

---

1. Los Alamos National Laboratory

We report new magnetization measurements on the spin-gap compound NiCl{sub 2}-4SC(NH{sub 2}){sub 2} at the low-field boundary of the magnetic field induced ordering. The critical density of the magnetization is analyzed in terms of a Bose-Einstein condensation (BEC) of bosonic quasiparticles. The analysis of the magnetization at the transition leads to the conclusion for the preservation of the U(1) symmetry, as required for BEC. The experimental data are well described by quantum Monte Carlo simulations.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 962298
• Report Number(s): LA-UR-09-01292; LA-UR-09-1292
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BOSE-EINSTEIN CONDENSATION
MAGNETIC FIELDS
MAGNETIZATION
PRESERVATION
SYMMETRY