2011/05/04 by R. Jafari · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Adiabatic process #Entropy (arrow of time) #Magnetic and transport properties of perovskites and related materials #Magnetic refrigeration #Phase transition #Quantum #Quantum annealing #Quantum critical point #Quantum many-body systems #Quantum phase transition #Quantum phases #Thermoelastic and Magnetoelastic Phenomena #Transverse plane #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1140/epjb/e2012-20682-5
published as Eur. Phys. J. B (2012) 85: 167
arxiv created 2011/05/04 · openalex publication_date 2012/05/01 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The presence of a quantum critical point can significantly affect the thermodynamic properties of a material at finite temperatures. This is reflected, e.g., in the entropy landscape S(T; c) in the vicinity of a quantum critical point, yielding particularly strong variations for varying the tuning parameter c such as magnetic field. In this work we have studied the thermodynamic properties of the quantum compass model in the presence of a transverse field. The specific heat, entropy and cooling rate under an adiabatic demagnetization process have been calculated. During an adiabatic (de)magnetization process temperature drops in the vicinity of a field-induced zero-temperature quantum phase transitions. However close to field-induced quantum phase transitions we observe a large magnetocaloric effect.