Reentrant Peak Effect and Melting of a Flux Line Lattice in 2H-Nb <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>Se</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>

K. Ghosh; S. Ramakrishnan; A. K. Grover; Gautam I. Menon; Girish Chandra; T. V. Chandrasekhar Rao; G. Ravikumar; P. K. Mishra; V. C. Sahni; C. V. Tomy; G. Balakrishnan; D. Mck Paul; S. Bhattacharya

doi:10.1103/PhysRevLett.76.4600

Reentrant Peak Effect and Melting of a Flux Line Lattice in 2H-Nb ${Se}_{2}$

K. Ghosh, S. Ramakrishnan, A. K. Grover, Gautam I. Menon, Girish Chandra, T. V. Chandrasekhar Rao, G. Ravikumar, P. K. Mishra, V. C. Sahni, C. V. Tomy, G. Balakrishnan, D. Mck Paul, and S. Bhattacharya

Phys. Rev. Lett. 76, 4600 – Published 10 June 1996

Abstract

A reentrant peak effect is observed through low field ac susceptibility measurements on the weakly pinned flux line lattice in single crystals of 2H-Nb ${Se}_{2}$ . The resulting phase diagram of the peak effect is strikingly similar to the theoretically predicted reentrant phase boundary which separates flux lattice and flux liquid phases. The broadening and ultimate disappearance of the peak effect at very low fields is consistent with the predicted crossover to a disordered glassy state in this field regime.