Disorder from Disorder in a Strongly Frustrated Transverse Field Ising Chain

Details Disorder from Disorder in a Strongly Frustrated Transverse Field Ising Chain Disorder from Disorder in a Strongly Frustrated Transverse Field Ising Chain

2000-05-11

arxiv.org/abs/cond-mat/0005185v1

Physics

Condensed Matter

Statistical Mechanics

8 pages, RevTex, 7 Figures

Scientific paper

10.1103/PhysRevB.64.134424

We study a one-dimensional chain of corner-sharing triangles with antiferromagnetic Ising interactions along its bonds. Classically, this system is highly frustrated with an extensive entropy at T = 0 and exponentially decaying spin correlations. We show that the introduction of a quantum dynmamics via a transverse magnetic field removes the entropy and opens a gap, but leaves the ground state disordered at all values of the transverse field, thereby providing an analog of the "disorder by disorder" scenario first proposed by Anderson and Fazekas in their search for resonating valence bond states. Our conclusion relies on exact diagonalization calculations as well as on the analysis of a 14th order series expansion about the large transverse field limit. This test suggests that the series method could be used to search for other instances of quantum disordered states in frustrated transverse field magnets in higher dimensions.

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