Naslov
Field-induced quantum soliton lattice in a frustrated two-leg spin-1/2 ladder

Autori
Casola Francesco ; Shiroka, Toni ; Feguin, Adrian ; Wang, Shuang ; Grbić, Mihael Srđan ; Horvatić, Mladen ; Krämer, Steffen ; Mukhopadhyay, Sutirtha ; Conder, Kazimierz ; Berthier, Claude ; Ott, Hans Rudolf ; Rønnow, Henrik Moodysson ; Rüegg, Christian ; Mesot Joël

Izvornik
Physical Review Letters (0031-9007) 110 (2013), 18; 187201-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
frustration; magnetism; soliton; ladder; fractional excitations

Sažetak
The field-induced quantum phase transitions (QPT) of the spin ladder material Bi(Cu(1-x)Znx)2PO6 have been investigated via 31P nuclear magnetic resonance (NMR) on single-crystal samples with x = 0 and x = 0.01. Measurements at temperatures between 0.25 K and 20 K in magnetic fields up to 31 T served to establish the nature of the various phases. In BiCu2PO6, an incommensurate (IC) magnetic order develops above a critical field mu0*H(c1) ~ 21 T ; the field and temperature dependences of the NMR lines and the resulting model for the spin structure are discussed. Supported by results of Density-Matrix Renormalization Group (DMRG) calculations it is argued that the observed field-induced IC order involves the formation of a magnetic-soliton lattice. An additional QPT is predicted to occur at H > H(c1). For x = 0.01, this IC order is found to be stable against site disorder, although with a renormalized critical field.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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