The effect of Zeeman energy on heat capacity of GaAs/AlGaAs heterostructures near ν=1

✍ Scribed by S Melinte; E Grivei; J.-M Beuken; G Mariage; L Malcorps; C Gustin; V Bayot; M Shayegan

• Book ID: 104429352
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 96 KB
• Volume: 6
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(99)00054-5

✦ Synopsis

By controlling the ratio Á between the Zeeman and Coulomb energies, the heat capacity of a multilayer two-dimensional electron system (2DES) is measured near Landau level ÿlling = 1 at 60 mK. The data reveal the disappearance of the nuclear spin contribution of GaAs quantum wells to the heat capacity as Á exceeds a critical value Á C ≈ 0:04. This result is interpreted as the e ect of the transition from Skyrmions to single electron spin ips at large Zeeman energy.