Triplon Localization Effect in Tl_{1-x}$K_xCuCl_3
| dc.creator | Shindo, Yosuke | |
| dc.creator | Tanaka, Hidekazu | |
| dc.date | 2003-10-29 | |
| dc.date | 2004-03-03 | |
| dc.date.accessioned | 2026-07-07T02:54:29Z | |
| dc.date.available | 2026-07-07T02:54:29Z | |
| dc.description | The effect of randomness on field-induced magnetic ordering was investigated through specific heat measurements in Tl$_{1-x}$K$_x$CuCl$_3$ with $x\leq 0.22$. The isostructural parent compounds TlCuCl$_3$ and KCuCl$_3$ are coupled spin dimer systems with a gapped ground state and their field-induced antiferromagnetic ordering is described by the Bose condensation of spin triplets (triplons). Well-defined field-induced phase transitions were observed in Tl$_{1-x}$K$_x$CuCl$_3$. The critical exponent $ϕ$ of the phase boundary defined by $T(H) \propto (H-H_{\rm c})^{1/ϕ}$ is reevaluated in TlCuCl$_3$ as $ϕ=1.67 \pm 0.07$, which is close to $ϕ_{\rm BEC} =3/2$ derived from the triplon BEC theory. For $x \neq 0$, the exponent $ϕ$ decreases systematically with $x$. The phase boundary observed at low temperatures for $x>0.1$ is almost a linear function of temperature $T$. In the low-field region for $H<H_{\rm c}$, no magnetic ordering is observed in spite of finite susceptibility. These properties are discussed in connection with the Bose glass phase argued by Fisher {\it et al.} [Phys. Rev. B {\bf 40}, 546 (1989)]. | |
| dc.description | 4 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0310691 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0310691 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/22569 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Triplon Localization Effect in Tl_{1-x}$K_xCuCl_3 | |
| dc.type | text |