@article{Vaitkus2018,

title = {Büttiker probes and the recursive Green's function: An efficient approach to include dissipation in general configurations},

author = {Jesse A. Vaitkus and Jared H. Cole},

doi = {10.1103/physrevb.97.085149},

issn = {2469-9969},

year  = {2018},

date = {2018-02-00},

journal = {Phys. Rev. B},

volume = {97},

number = {8},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Jiang2017,

title = {Broadband Nonlinear Photonics in Few‐Layer MXene Ti_{3}C_{2}T_{x} (T = F, O, or OH)},

author = {Xiantao Jiang and Shunxiang Liu and Weiyuan Liang and Shaojuan Luo and Zhiliang He and Yanqi Ge and Huide Wang and Rui Cao and Feng Zhang and Qiao Wen and Jianqing Li and Qiaoliang Bao and Dianyuan Fan and Han Zhang},

doi = {10.1002/lpor.201700229},

issn = {1863-8899},

year  = {2018},

date = {2018-02-00},

journal = {Laser & Photonics Reviews},

volume = {12},

number = {2},

publisher = {Wiley},

abstract = {AbstractStudies of the nonlinear optical phenomena that describe the light‐matter interactions in 2D crystalline materials have promoted a diverse range of photonic applications. MXene, as a recently developed new 2D material, has attracted considerable attention because of its graphene‐like but highly tunable and tailorable electronic/optical properties. In this study, we systematically characterize the nonlinear optical response of MXene Ti3C2Tx nanosheets over the spectral range of 800 nm to 1800 nm. A large effective nonlinear absorption coefficient (βeff∼‐10−21 m2/V2) due to saturable absorption is observed for all of the testing wavelengths. The contribution of saturable absorption is two orders of magnitude higher than other lossy nonlinear absorption processes, and the amplitude of βeff strongly depends on the light bleaching level. A negative nonlinear refractive index (n2∼‐10−20 m2/W) with value comparable to that of the intensively studied graphene was demonstrated for the first time. These results demonstrate the efficient broadband light signal manipulating capabilities of Ti3C2Tx, which is only one member of the large MXene family. The capability of an efficient broadband optical switch is strongly confirmed using Ti3C2Tx as saturable absorbers for mode‐locking operation at 1066 nm and 1555 nm, respectively. A highly stable femtosecond laser with pulse duration as short as 159 fs in the telecommunication window is readily obtained. Considering the diversity of the MXene family, this study may open a new avenue to advanced photonic

devices.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sando2017,

title = {Revisiting the Optical Band Gap in Epitaxial BiFeO_{3} Thin Films},

author = {Daniel Sando and Cécile Carrétéro and Mathieu N. Grisolia and Agnès Barthélémy and Valanoor Nagarajan and Manuel Bibes},

doi = {10.1002/adom.201700836},

issn = {2195-1071},

year  = {2018},

date = {2018-01-00},

journal = {Advanced Optical Materials},

volume = {6},

number = {2},

publisher = {Wiley},

abstract = {AbstractA detailed structural and optical band gap characterization study for more than 40 epitaxial bismuth ferrite (BiFeO3—BFO) thin films, measured by X‐ray diffraction, atomic force microscopy, and optical transmission spectroscopy, is reported. The films are grown in different deposition systems to varying thicknesses (10–140 nm), on several substrates, and under different growth and cooling conditions. Using the results and literature data, first it is shown that the band gap measured by transmission is systematically lower than the gap found by ellipsometry, suggesting that sufficient caution must be exercised when comparing optical properties of BFO thin films. Then, statistical analysis is used to look for correlations between the band gap and structural parameters. While earlier works show the band gap to be sensitive to epitaxial (homogeneous) strain, it is found that it appears not to exhibit a dependence on inhomogeneous strain, out‐of‐plane lattice constant, or substrate/film interface roughness. Rather, it is found that surface roughness as well as film thickness generally tends to enhance the gap. Overall, the insensitivity of the band gap to structural parameters—aside from homogeneous strain—makes BiFeO3 largely immune to deviations in processing parameters, which should be an asset for photonic devices based on this material.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Atkin2018,

title = {Evolution of 2D tin oxides on the surface of molten tin},

author = {P. Atkin and R. Orrell-Trigg and A. Zavabeti and N. Mahmood and M. R. Field and T. Daeneke and I. S. Cole and K. Kalantar-zadeh},

doi = {10.1039/c7cc09040d},

issn = {1364-548X},

year  = {2018},

date = {2018-00-00},

journal = {Chem. Commun.},

volume = {54},

number = {17},

pages = {2102--2105},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {
The exfoliation of two dimensional (2D) oxides, established on the surface of specific liquid metals, has recently been introduced.
},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Alaal2018,

title = {Tunable electronic properties of partially edge-hydrogenated armchair boron–nitrogen–carbon nanoribbons},

author = {Naresh Alaal and Nikhil Medhekar and Alok Shukla},

doi = {10.1039/c7cp08234g},

issn = {1463-9084},

year  = {2018},

date = {2018-00-00},

journal = {Phys. Chem. Chem. Phys.},

volume = {20},

number = {15},

pages = {10345--10358},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {
We employ a first-principles calculations based density-functional-theory (DFT) approach to study the electronic properties of partially and fully edge-hydrogenated armchair boron–nitrogen–carbon (BNC) nanoribbons (ABNCNRs), with widths between 0.85 nm to 2.3 nm.
},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Messalea2018,

title = {Bi_{2}O_{3} monolayers from elemental liquid bismuth},

author = {Kibret A. Messalea and Benjamin J. Carey and Azmira Jannat and Nitu Syed and Md Mohiuddin and Bao Yue Zhang and Ali Zavabeti and Taimur Ahmed and Nasir Mahmood and Enrico Della Gaspera and Khashayar Khoshmanesh and Kourosh Kalantar-Zadeh and Torben Daeneke},

doi = {10.1039/c8nr03788d},

issn = {2040-3372},

year  = {2018},

date = {2018-00-00},

journal = {Nanoscale},

volume = {10},

number = {33},

pages = {15615--15623},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {
Atomically thin layers of Bi_{2}O_{3} are isolated from liquid bismuth, allowing the development of ultrafast 2D-enabled UV photo-detectors.
},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zhang2018c,

title = {Nonlinear optical absorption and ultrafast carrier dynamics of copper antimony sulfide semiconductor nanocrystals},

author = {Feng Zhang and Keqiang Chen and Xiantao Jiang and Yunzheng Wang and Yanqi Ge and Leimin Wu and Shixiang Xu and Qiaoliang Bao and Han Zhang},

doi = {10.1039/c8tc01606b},

issn = {2050-7534},

year  = {2018},

date = {2018-00-00},

journal = {J. Mater. Chem. C},

volume = {6},

number = {33},

pages = {8977--8983},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {
Ternary copper antimony sulfide nanocrystals (CAS NCs), a promising solar cell candidate, have been proposed and investigated from the perspective of nonlinear optical response and ultrafast photoinduced carrier dynamics.
},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Yuan2017,

title = {Infrared Nanoimaging Reveals the Surface Metallic Plasmons in Topological Insulator},

author = {Jian Yuan and Weiliang Ma and Lei Zhang and Yao Lu and Meng Zhao and Hongli Guo and Jin Zhao and Wenzhi Yu and Yupeng Zhang and Kai Zhang and Hui Ying Hoh and Xiaofeng Li and Kian Ping Loh and Shaojuan Li and Cheng-Wei Qiu and Qiaoliang Bao},

doi = {10.1021/acsphotonics.7b00568},

issn = {2330-4022},

year  = {2017},

date = {2017-12-20},

journal = {ACS Photonics},

volume = {4},

number = {12},

pages = {3055--3062},

publisher = {American Chemical Society (ACS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Wang2017,

title = {Topological-insulator-based terahertz modulator},

author = {X. B. Wang and L. Cheng and Y. Wu and D. P. Zhu and L. Wang and Jian-Xin Zhu and Hyunsoo Yang and Elbert E. M. Chia},

doi = {10.1038/s41598-017-13701-9},

issn = {2045-2322},

year  = {2017},

date = {2017-12-00},

journal = {Sci Rep},

volume = {7},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractThree dimensional topological insulators, as a new phase of quantum matters, are characterized by an insulating gap in the bulk and a metallic state on the surface. Particularly, most of the topological insulators have narrow band gaps, and hence have promising applications in the area of terahertz optoelectronics. In this work, we experimentally demonstrate an electronically-tunable terahertz intensity modulator based on Bi1:5Sb0:5Te1:8Se1:2 single crystal, one of the most insulating topological insulators. A relative frequency-independent modulation depth of ~62% over a wide frequency range from 0.3 to 1.4 THz has been achieved at room temperature, by applying a bias current of 100 mA. The modulation in the low current regime can be further enhanced at low temperature. We propose that the extraordinarily large modulation is a consequence of thermally-activated carrier absorption in the semiconducting bulk states. Our work provides a new application of topological insulators for terahertz technology.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Liu2017c,

title = {Generalized Stoner criterion and versatile spin ordering in two-dimensional spin-orbit coupled electron systems},

author = {Weizhe Edward Liu and Stefano Chesi and David Webb and U. Zülicke and R. Winkler and Robert Joynt and Dimitrie Culcer},

doi = {10.1103/physrevb.96.235425},

issn = {2469-9969},

year  = {2017},

date = {2017-12-00},

journal = {Phys. Rev. B},

volume = {96},

number = {23},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sekine2017,

title = {Quantum kinetic theory of the chiral anomaly},

author = {Akihiko Sekine and Dimitrie Culcer and Allan H. MacDonald},

doi = {10.1103/physrevb.96.235134},

issn = {2469-9969},

year  = {2017},

date = {2017-12-00},

journal = {Phys. Rev. B},

volume = {96},

number = {23},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Liu2017d,

title = {Temperature-dependent 

n−p

 transition in a three-dimensional Dirac semimetal 

Na3Bi

 thin film},

author = {Chang Liu and Jack Hellerstedt and Mark T. Edmonds and Michael S. Fuhrer},

doi = {10.1103/physrevb.96.235412},

issn = {2469-9969},

year  = {2017},

date = {2017-12-00},

journal = {Phys. Rev. B},

volume = {96},

number = {23},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Ramakrishnan2017,

title = {Equivalence of effective medium and random resistor network models for disorder-induced unsaturating linear magnetoresistance},

author = {Navneeth Ramakrishnan and Ying Tong Lai and Silvia Lara and Meera M. Parish and Shaffique Adam},

doi = {10.1103/physrevb.96.224203},

issn = {2469-9969},

year  = {2017},

date = {2017-12-00},

journal = {Phys. Rev. B},

volume = {96},

number = {22},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Edmonds2017,

title = {Spatial charge inhomogeneity and defect states in topological Dirac semimetal thin films of Na

            _{3}

            Bi},

author = {Mark T. Edmonds and James L. Collins and Jack Hellerstedt and Indra Yudhistira and Lídia C. Gomes and João N. B. Rodrigues and Shaffique Adam and Michael S. Fuhrer},

doi = {10.1126/sciadv.aao6661},

issn = {2375-2548},

year  = {2017},

date = {2017-12-00},

journal = {Sci. Adv.},

volume = {3},

number = {12},

publisher = {American Association for the Advancement of Science (AAAS)},

abstract = {

            Small potential variations in 3D semimetal Na

            3

            Bi enable close approach to the Dirac point, allowing exploration of new physics.

          },

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lin2017,

title = {Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cells},

author = {Xiongfeng Lin and Askhat N. Jumabekov and Niraj N. Lal and Alexander R. Pascoe and Daniel E. Gómez and Noel W. Duffy and Anthony S. R. Chesman and Kallista Sears and Maxime Fournier and Yupeng Zhang and Qiaoliang Bao and Yi-Bing Cheng and Leone Spiccia and Udo Bach},

doi = {10.1038/s41467-017-00588-3},

issn = {2041-1723},

year  = {2017},

date = {2017-12-00},

journal = {Nat Commun},

volume = {8},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractHybrid organic-inorganic halide perovskites are low-cost solution-processable solar cell materials with photovoltaic properties that rival those of crystalline silicon. The perovskite films are typically sandwiched between thin layers of hole and electron transport materials, which efficiently extract photogenerated charges. This affords high-energy conversion efficiencies but results in significant performance and fabrication challenges. Herein we present a simple charge transport layer-free perovskite solar cell, comprising only a perovskite layer with two interdigitated gold back-contacts. Charge extraction is achieved via self-assembled monolayers and their associated dipole fields at the metal-perovskite interface. Photovoltages of ~600 mV generated by self-assembled molecular monolayer modified perovskite solar cells are equivalent to the built-in potential generated by individual dipole layers. Efficient charge extraction results in photocurrents of up to 12.1 mA cm−2 under simulated sunlight, despite a large electrode spacing.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Daeneke2017,

title = {Wafer-Scale Synthesis of Semiconducting SnO Monolayers from Interfacial Oxide Layers of Metallic Liquid Tin},

author = {Torben Daeneke and Paul Atkin and Rebecca Orrell-Trigg and Ali Zavabeti and Taimur Ahmed and Sumeet Walia and Maning Liu and Yasuhiro Tachibana and Maria Javaid and Andrew D. Greentree and Salvy P. Russo and Richard B. Kaner and Kourosh Kalantar-Zadeh},

doi = {10.1021/acsnano.7b04856},

issn = {1936-086X},

year  = {2017},

date = {2017-11-28},

journal = {ACS Nano},

volume = {11},

number = {11},

pages = {10974--10983},

publisher = {American Chemical Society (ACS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Cao2017,

title = {Defect introduced paramagnetism and weak localization in two-dimensional metal VSe_{2}},

author = {Qiang Cao and Frank F Yun and Lina Sang and Feixiang Xiang and Guolei Liu and Xiaolin Wang},

doi = {10.1088/1361-6528/aa8f6c},

issn = {1361-6528},

year  = {2017},

date = {2017-11-24},

journal = {Nanotechnology},

volume = {28},

number = {47},

publisher = {IOP Publishing},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sun2017,

title = {Flexible Broadband Graphene Photodetectors Enhanced by Plasmonic Cu_{3−}\textit{_{x}}P Colloidal Nanocrystals},

author = {Tian Sun and Yongjie Wang and Wenzhi Yu and Yusheng Wang and Zhigao Dai and Zeke Liu and Bannur Nanjunda Shivananju and Yupeng Zhang and Kai Fu and Babar Shabbir and Wanli Ma and Shaojuan Li and Qiaoliang Bao},

doi = {10.1002/smll.201701881},

issn = {1613-6829},

year  = {2017},

date = {2017-11-00},

journal = {Small},

volume = {13},

number = {42},

publisher = {Wiley},

abstract = {AbstractThe integration of graphene with colloidal quantum dots (QDs) that have tunable light absorption affords new opportunities for optoelectronic applications as such a hybrid system solves the problem of both quantity and mobility of photocarriers. In this work, a hybrid system comprising of monolayer graphene and self‐doped colloidal copper phosphide (Cu3−xP) QDs is developed for efficient broadband photodetection. Unlike conventional PbS QDs that are toxic, Cu3−xP QDs are environmental friendly and have plasmonic resonant absorption in near‐infrared (NIR) wavelength. The half‐covered graphene with Cu3−xP nanocrystals (NCs) behaves as a self‐driven p–n junction and shows durable photoresponse in NIR range. A comparison experiment reveals that the surface ligand attached to Cu3−xP NCs plays a key role in determining the charge transfer efficiency from Cu3−xP to graphene. The most efficient three‐terminal photodetectors based on graphene‐Cu3−xP exhibit broadband photoresponse from 400 to 1550 nm with an ultrahigh responsivity (1.59 × 105 A W−1) and high photoconductive gain (6.66 × 105) at visible wavelength (405 nm), and a good responsivity of 9.34 A W−1 at 1550 nm. The demonstration of flexible graphene‐Cu3−xP photodetectors operated at NIR wavelengths may find potential applications in optical sensing, biological imaging, and wearable devices.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Capsoni2017,

title = {Selective Hybridization of a Terpyridine-Based Molecule with a Noble Metal},

author = {M. Capsoni and A. Schiffrin and K. A. Cochrane and C.-G. Wang and T. Roussy and A. Q. Shaw and W. Ji and S. A. Burke},

doi = {10.1021/acs.jpcc.7b08576},

issn = {1932-7455},

year  = {2017},

date = {2017-10-26},

journal = {J. Phys. Chem. C},

volume = {121},

number = {42},

pages = {23574--23581},

publisher = {American Chemical Society (ACS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zavabeti2017,

title = {A liquid metal reaction environment for the room-temperature synthesis of atomically thin metal oxides},

author = {Ali Zavabeti and Jian Zhen Ou and Benjamin J. Carey and Nitu Syed and Rebecca Orrell-Trigg and Edwin L. H. Mayes and Chenglong Xu and Omid Kavehei and Anthony P. O’Mullane and Richard B. Kaner and Kourosh Kalantar-zadeh and Torben Daeneke},

doi = {10.1126/science.aao4249},

issn = {1095-9203},

year  = {2017},

date = {2017-10-20},

journal = {Science},

volume = {358},

number = {6361},

pages = {332--335},

publisher = {American Association for the Advancement of Science (AAAS)},

abstract = {Expanding the world of 2D materials

          

            Two-dimensional (2D) materials have a wide variety of potential applications in the electronics industry. However, certain compositions of 2D materials are difficult to obtain owing to the challenges in exfoliating thin sheets from bulk crystals. Zavabeti

            et al.

            exploited liquid metals to synthesize 2D Ga

            2

            O

            3

            , HfO

            2

            , Gd

            2

            O

            3

            , and Al

            2

            O

            3

            . The 2D sheets appear as a surface layer in gallium-based liquid metals after the Hf, Gd, or Al is dissolved into the bulk alloy. The 2D oxide that appears on the surface is the oxide with the lowest energy, suggesting that it should be possible to make other 2D oxides by using the same process.

          

          

            Science

            , this issue p.

            332

          },

keywords = {},

pubstate = {published},

tppubtype = {article}

}