Zobrazeno 1 - 10
of 11 557
pro vyhledávání: '"first order transitions"'
Autor:
Pelissetto, Andrea, Vicari, Ettore
We consider quantum and classical first-order transitions, at equilibrium and under out-of-equilibrium conditions, mainly focusing on quench and slow quasi-adiabatic protocols. For these phenomena, we review the finite-size scaling theory appropriate
Externí odkaz:
http://arxiv.org/abs/2302.08238
We show that tailoring the dissipative environment allows to change the features of continuous quantum phase transitions and, even, induce first order transitions in ferromagnetic spin chains. In particular, using a numerically exact quantum Monte Ca
Externí odkaz:
http://arxiv.org/abs/2207.13782
Autor:
Janssen, Lukas, Seifert, Urban F. P.
Publikováno v:
Phys. Rev. B 105, 045120 (2022)
We study the zero-temperature phase diagrams of Majorana-Hubbard models with SO($N$) symmetry on two-dimensional honeycomb and $\pi$-flux square lattices, using mean-field and renormalization group approaches. The models can be understood as real cou
Externí odkaz:
http://arxiv.org/abs/2111.01812
Autor:
Hida, Kazuo
Publikováno v:
J. Phys. Soc. Jpn., 91, 024706 (2022)
The ground-state phases of mixed diamond chains with bond alternation $\delta$, and ($S, \tau^{(1)}, \tau^{(2)})=(1/2,1/2,1)$, where $S$ is the magnitude of vertex spins, and $\tau^{(1)}$ and $\tau^{(2)}$ are those of apical spins, are investigated.
Externí odkaz:
http://arxiv.org/abs/2111.07054
The nature of the thermal melting process by which triangular-lattice Ising antiferromagnets lose their low-temperature ferrimagnetic three-sublattice order depends on the range of the interactions: It changes character when second and third neighbou
Externí odkaz:
http://arxiv.org/abs/2109.03178
Publikováno v:
SciPost Phys. 12, 054 (2022)
The phase diagrams of highly frustrated quantum spin systems can exhibit first-order quantum phase transitions and thermal critical points even in the absence of any long-ranged magnetic order. However, all unbiased numerical techniques for investiga
Externí odkaz:
http://arxiv.org/abs/2105.05271
Autor:
Sangeetha, N. S., Pakhira, Santanu, Ding, Q. -P., Lee, H. -C., Smetana, V., Mudring, A. -V., Furukawa, Y., Johnston, D. C.
Publikováno v:
Proc. Nat. Acad. Sci. USA 118, e2108724118 (2021)
Single crystals of SrMn2P2 and CaMn2P2 were grown using Sn flux and characterized by single-crystal x-ray diffraction, electrical resistivity rho, heat capacity Cp, and magnetic susceptibility chi = M/H measurements versus temperature T and magnetiza
Externí odkaz:
http://arxiv.org/abs/2105.02394
Autor:
Zhang, Zhao, Chen, Yanna, Yu, Dehong, Mole, Richard, Yu, Chenyang, Zhang, Zhe, Zhou, Houbo, Yan, Xuexi, Zhao, Xinguo, Ren, Weijun, Chen, Chunlin, Owada, Shigeki, Tono, Kensuke, Sugahara, Michihiro, Cao, Yue, Sakata, Osami, Bedzyk, Michael J., Li, Bing, Hu, Fengxia, Shen, Baogen, Zhang, Zhidong
First-order magnetic transitions are of both fundamental and technological interest given that a number of emergent phases and functionalities are thereby created. Of particular interest are giant magnetocaloric effects, which are attributed to first
Externí odkaz:
http://arxiv.org/abs/2012.03186
Autor:
Sheshadri, K., Chainani, A.
Publikováno v:
Phys. Rev. Research 2, 023291 (2020)
A model of a mixture of spinless fermions and spin-zero hardcore bosons, with filling fractions $\rho_F$ and $\rho_B$, respectively, on a two-dimensional square lattice with {\em composite} hopping $t$ is presented. In this model, hopping swaps the l
Externí odkaz:
http://arxiv.org/abs/1912.00132
Autor:
Fontana, Pierpaolo
We investigate how the scaling behavior of finite systems at magnetic first-order transitions (FOTs) with relaxational dynamics changes in correspondence of various boundary conditions. As a theoretical laboratory we consider the two-dimensional Isin
Externí odkaz:
http://arxiv.org/abs/1903.01513