(C_5H_9NH_3)_2CuBr_4: a metal-organic two-ladder quantum magnet
arxiv(2024)
摘要
Low-dimensional quantum magnets are a versatile materials platform for
studying the emergent many-body physics and collective excitations that can
arise even in systems with only short-range interactions. Understanding their
low-temperature structure and spin Hamiltonian is key to explaining their
magnetic properties, including unconventional quantum phases, phase
transitions, and excited states. We study the metal-organic coordination
compound (C_5H_9NH_3)_2CuBr_4 and its deuterated counterpart, which
upon its discovery was identified as a candidate two-leg quantum (S = 1/2)
spin ladder in the strong-leg coupling regime. By growing large single crystals
and probing them with both bulk and microscopic techniques, we deduce that two
previously unknown structural phase transitions take place between 136 K and
113 K. The low-temperature structure has a monoclinic unit cell giving rise to
two inequivalent spin ladders. We further confirm the absence of long-range
magnetic order down to 30 mK and discuss the implications of this two-ladder
structure for the magnetic properties of (C_5H_9NH_3)_2CuBr_4.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要