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Publications (17)

cond-mat.mtrl-sci2023

YbV $_{3}$ Sb $_{4}$ and EuV $_{3}$ Sb $_{4}$ , vanadium-based kagome metals with Yb $^{2 +}$ and Eu $^{2 +}$ zig-zag chains

Brenden R. Ortiz, Ganesh Pokharel, Malia Gundayao +14

Here we present YbV $_{3}$ Sb $_{4}$ and EuV $_{3}$ Sb $_{4}$ , two new compounds exhibiting slightly distorted vanadium-based kagome nets interleaved with zig-zag chains of divalent Yb $^{2 +}$ an…

cond-mat.str-el2020

Field-tunable quantum disordered ground state in the triangular lattice antiferromagnet NaYbO $_{2}$

Mitchell Bordelon, Eric Kenney, Tom Hogan +8

Antiferromagnetically coupled S=1/2 spins on an isotropic triangular lattice is the paradigm of frustrated quantum magnetism, but structurally ideal realizations are rare. Here we…

cond-mat.str-el2013

Neutron scattering study of correlated phase behavior in Sr2IrO4

Chetan Dhital, Tom Hogan, Z. Yamani +5

Neutron diffraction measurements are presented exploring the magnetic and structural phase behaviors of the candidate J $_{e f f} = 1/2$ Mott insulating iridate Sr $_{2}$ IrO $_{4}$ . Compariso…

cond-mat.str-el2023

Fluctuation-driven, topology-stabilized order in a correlated nodal semimetal

Nathan C. Drucker, Thanh Nguyen, Fei Han +19

The interplay between strong electron correlation and band topology is at the forefront of condensed matter research. As a direct consequence of correlation, magnetism enriches top…

cond-mat.str-el2016

Structural investigation of the bilayer iridate Sr3Ir2O7

Tom Hogan, Lars Bjaalie, Liuyan Zhao +5

A complete structural solution of the bilayer iridate compound Sr3Ir2O7 presently remains outstanding. Previously reported structures for this compound vary and all fail to explain…

cond-mat.supr-con2014

The evolution of antiferromagnetic susceptibility to uniaxial pressure in Ba(Fe{1-x}Co{x})2As2

Chetan Dhital, Tom Hogan, Z. Yamani +6

Neutron diffraction measurements are presented measuring the responses of both magnetic and structural order parameters of parent and lightly Co-doped Ba(Fe{1-x}Co{x})2As2 under th…

cond-mat.str-el2019

Doping induced Mott collapse and the density wave instabilities in (Sr $_{1 - x}$ La $_{x}$ ) $_{3}$ Ir $_{2}$ O $_{7}$

Zhenyu Wang, Daniel Walkup, Yulia Maximenko +5

The path from a Mott insulating phase to high temperature superconductivity encounters a rich set of unconventional phenomena involving the insulator-to-metal transition (IMT) such…

cond-mat.str-el2014

Short-range correlations in the magnetic ground state of Na4Ir3O8

Rebecca Dally, Tom Hogan, Alex Amato +5

The magnetic ground state of the hyper-kagome lattice in Na4Ir3O8 is explored via combined bulk magnetization, muon spin relaxation, and neutron scattering measurements. A short-ra…

cond-mat.mes-hall2020

Quantized Thermoelectric Hall Effect Induces Giant Power Factor in a Topological Semimetal

Fei Han, Nina Andrejevic, Thanh Nguyen +14

Thermoelectrics are promising by directly generating electricity from waste heat. However, (sub-)room-temperature thermoelectrics have been a long-standing challenge due to vanishi…

cond-mat.str-el2014

Carrier localization and electronic phase separation in a doped spin-orbit driven Mott phase in Sr3(Ir1-xRux)2O7

Chetan Dhital, Tom Hogan, Wenwen Zhou +13

Interest in many strongly spin-orbit coupled 5d-transition metal oxide insulators stems from mapping their electronic structures to a J=1/2 Mott phase. One of the hopes is to estab…

quant-ph2025

Cryogenic Thermal Modeling of Microwave High Density Signaling

Naomi Raicu, Tom Hogan, Xian Wu +4

Superconducting quantum computers require microwave control lines running from room temperature to the mixing chamber of a dilution refrigerator. Adding more lines without prelimin…

cond-mat.mtrl-sci2022

Pervasive beyond room-temperature ferromagnetism in a doped van der Waals magnet: Ni doped Fe $_{5}$ GeTe $_{2}$ with $T_{C}$ up to 478 K

Xiang Chen, Yu-Tsun Shao, Rui Chen +10

The existence of long range magnetic order in low dimensional magnetic systems, such as the quasi-two-dimensional (2D) van der Waals (vdW) magnets, has attracted intensive studies…

cond-mat.str-el2016

Disordered dimer state in electron-doped Sr $_{3}$ Ir $_{2}$ O $_{7}$

Tom Hogan, Rebecca Dally, Mary Upton +5

Spin excitations are explored in the electron-doped spin-orbit Mott insulator (Sr $_{1 - x}$ La $_{x}$ ) $_{3}$ Ir $_{2}$ O $_{7}$ . As this bilayer square lattice system is doped into the metallic…

cond-mat.str-el2015

The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4

Xiang Chen, Tom Hogan, D. Walkup +11

The evolution of the electronic properties of electron-doped (Sr{1-x}La{x})2IrO4 is experimentally explored as the doping limit of La is approached. As electrons are introduced, th…

cond-mat.str-el2017

Doping driven structural distortion in the bilayer iridate (Sr $_{1 - x}$ La $_{x}$ ) $_{3}$ Ir $_{2}$ O $_{7}$

Tom Hogan, Xiaoping Wang, H. Chu +2

Neutron single crystal diffraction and rotational anisotropy optical second harmonic generation data are presented resolving the nature of the structural distortion realized in ele…

cond-mat.str-el2018

Disorder induced power-law gaps in an insulator-metal Mott transition

Zhenyu Wang, Yoshinori Okada, Jared O'Neal +11

A correlated material in the vicinity of an insulator-metal transition (IMT) exhibits rich phenomenology and variety of interesting phases. A common avenue to induce IMTs in Mott i…

cond-mat.str-el2015

First-order melting of a weak spin-orbit Mott insulator into a correlated metal

Tom Hogan, Z. Yamani, D. Walkup +7

The electronic phase diagram of the weak spin-orbit Mott insulator (Sr(1-x)Lax)3Ir2O7 is determined via an exhaustive experimental study. Upon doping electrons via La substitution,…