Direct observation of melting of the vortex solid in Bi2Sr2CaCu2O8+delta single crystals
PHYSICAL REVIEW LETTERS, cilt.80, sa.16, ss.3610-3613, 1998 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 80 Sayı: 16
- Basım Tarihi: 1998
- Doi Numarası: 10.1103/physrevlett.80.3610
- Dergi Adı: PHYSICAL REVIEW LETTERS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.3610-3613
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
A scanning Hall probe microscope has been used to directly observe the vortex lattice melting transition in Bi2Sr2CaCu2O8+delta single crystals. Below the melting line, the system settles into a fairly well-ordered vortex solid which undergoes pronounced rotations as the field is increased due to incommensurability effects. Vortex contrast is lost abruptly and discontinuously at the melting line consistent with a first order transition. Vortex profiles appear to be strongly broadened by two-dimensional fluctuations which grow much stronger as the melting line is approached from below, suggesting that melting and decoupling are almost simultaneous.