Publications de Christopher Marc Mudry

Deconfined classical criticality in the anisotropic quantum spin-1 2 XY model on the square lattice

The anisotropic quantum spin- 1 2 XY model on a linear chain was solved by Lieb, Schultz, and Mattis [Ann. Phys. 16, 407 (1961)] and shown to display a continuous quantum phase transition at the O(2) symmetric point separating two gapped phases with compet ...

AMER PHYSICAL SOC2025

Designing the stripe-ordered cuprate phase diagram through uniaxial-stress

Christopher Marc Mudry

The ability to efficiently control charge and spin in the cuprate high-temperature superconductors is crucial for fundamental research and underpins technological development. Here, we explore the tunability of magnetism, superconductivity, and crystal str ...

National Academy of Sciences2024

Single monkey-saddle singularity of a Fermi surface and its instabilities

Christopher Marc Mudry

Fermi surfaces can undergo sharp transitions under smooth changes of parameters. Such transitions can have a topological character, as is the case when a higher-order singularity, one that requires cubic or higher-order terms to describe the electronic dis ...

2023

Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3

Oleg Yazyev, Daniel Gosalbez Martinez, Christopher Marc Mudry

Charge neutrality and their expected itinerant nature makes excitons potential transmitters of information. However, exciton mobility remains inaccessible to traditional optical experiments that only create and detect excitons with negligible momentum. Her ...

2022

Stability against contact interactions of a topological superconductor in two-dimensional space protected by time-reversal and reflection symmetries

Christopher Marc Mudry

We study the stability of topological crystalline superconductors in the symmetry class DIIIR and in two-dimensional space when perturbed by quartic contact interactions. It is known that no less than eight copies of helical pairs of Majorana edge modes ca ...

2021

Lieb-Schultz-Mattis type theorems for Majorana models with discrete symmetries

Christopher Marc Mudry

We prove two Lieb-Schultz-Mattis type theorems that apply to any translationally invariant and local fermionic d-dimensional lattice Hamiltonians for which fermion-number conservation is broken down to the conservation of fermion parity. We show that when ...

2021

Using Uniaxial Stress to Probe the Relationship between Competing Superconducting States in a Cuprate with Spin-stripe Order

Christopher Marc Mudry

We report muon spin rotation and magnetic susceptibility experiments on in-plane stress effects on the static spin-stripe order and superconductivity in the cuprate system La2-xBaxCuO4 with x = 0.115. An extremely low uniaxial stress of similar to 0.1 GPa ...

2020

Spiral order from orientationally correlated random bonds in classical XY models

Christopher Marc Mudry

We discuss the stability of ferromagnetic long-range order in three-dimensional classical XY ferromagnets upon substitution of a small subset of equally oriented bonds by impurity bonds, on which the ferromagnetic exchange J(perpendicular to) > 0 is replac ...

2020

Topological many-body scar states in dimensions one, two, and three

Christopher Marc Mudry

We propose an exact construction for atypical excited states of a class of nonintegrable quantum many-body Hamiltonians in one, two, and three dimensions that display area-law entanglement entropy. These examples of many-body "scar" states have, by design, ...

2019

Quantum phase transitions beyond Landau-Ginzburg theory in one-dimensional space revisited

Christopher Marc Mudry

The phase diagram of the quantum spin-1/2 antiferromagnetic J(1)-J(2) XXZ chain was obtained by Haldane using bosonization techniques [Haldane, Phys. Rev. B 25, 4925 (1982); 26, 5257 (1982)]. It supports three distinct phases for 0

2019